diff --git a/mrbgems/mruby-compiler/core/codegen.c b/mrbgems/mruby-compiler/core/codegen.c
index 7f7b5bd5b..a5c00c1c4 100644
--- a/mrbgems/mruby-compiler/core/codegen.c
+++ b/mrbgems/mruby-compiler/core/codegen.c
@@ -3578,18 +3578,6 @@ codegen_masgn(codegen_scope *s, node *tree, int val)
   }
 }
 
-static void
-codegen_stmts(codegen_scope *s, node *tree, int val)
-{
-  if (val && !tree) {
-    gen_load_nil(s, 1);
-  }
-  while (tree) {
-    codegen(s, tree->car, tree->cdr ? NOVAL : val);
-    tree = tree->cdr;
-  }
-}
-
 static void
 codegen_lambda(codegen_scope *s, node *tree, int val)
 {
@@ -4881,6 +4869,9 @@ gen_def_var(codegen_scope *s, node *varnode, int val)
 }
 
 /* Helper function for generating class/module/singleton class body */
+/* Forward declaration */
+static mrb_bool is_empty_stmts(node *stmt_node);
+
 static void
 gen_class_body(codegen_scope *s, node *body, int val)
 {
@@ -4892,7 +4883,7 @@ gen_class_body(codegen_scope *s, node *body, int val)
     node *body_stmts = body->cdr;
 
     /* Check for empty body case */
-    if (node_to_int(body_stmts->car) == NODE_STMTS && body_stmts->cdr == NULL) {
+    if (is_empty_stmts(body_stmts)) {
       genop_1(s, OP_LOADNIL, cursp());
     }
     else {
@@ -5876,9 +5867,7 @@ gen_ensure_var(codegen_scope *s, node *varnode, int val)
   node *body = ensure->body;
   node *ensure_clause = ensure->ensure_clause;
 
-  if (!ensure_clause ||
-      (node_to_int(ensure_clause->car) == NODE_STMTS &&
-       ensure_clause->cdr)) {
+  if (!ensure_clause || !is_empty_stmts(ensure_clause)) {
     int catch_entry, begin, end, target;
     int idx;
 
@@ -5901,6 +5890,41 @@ gen_ensure_var(codegen_scope *s, node *varnode, int val)
   }
 }
 
+static void
+gen_stmts_var(codegen_scope *s, node *varnode, int val)
+{
+  struct mrb_ast_stmts_node *stmts = stmts_node(varnode);
+  node *tree = STMTS_NODE_STMTS(stmts);
+
+  if (val && !tree) {
+    gen_load_nil(s, 1);
+  }
+  while (tree) {
+    codegen(s, tree->car, tree->cdr ? NOVAL : val);
+    tree = tree->cdr;
+  }
+}
+
+static mrb_bool
+is_empty_stmts(node *stmt_node)
+{
+  if (!stmt_node) return TRUE;
+
+  if (node_to_int(stmt_node->car) == NODE_VARIABLE) {
+    /* Variable-sized NODE_STMTS with internal cons-list */
+    if (NODE_TYPE(stmt_node) == NODE_STMTS) {
+      struct mrb_ast_stmts_node *stmts = stmts_node(NODE_VAR_NODE_PTR(stmt_node));
+      return STMTS_NODE_STMTS(stmts) == NULL;
+    }
+  }
+  else if (node_to_int(stmt_node->car) == NODE_STMTS) {
+    /* Traditional cons-list NODE_STMTS */
+    return stmt_node->cdr == NULL;
+  }
+
+  return FALSE;
+}
+
 // Group 16: Declarations and Definitions
 
 static void
@@ -6275,6 +6299,10 @@ codegen_variable_node(codegen_scope *s, node *varnode, int val)
     gen_ensure_var(s, varnode, val);
     return TRUE;
 
+  case NODE_STMTS:
+    gen_stmts_var(s, varnode, val);
+    return TRUE;
+
   case NODE_ALIAS:
     gen_alias_var(s, varnode, val);
     return TRUE;
@@ -6334,10 +6362,6 @@ codegen(codegen_scope *s, node *tree, int val)
   s->lineno = head->lineno;
   tree = tree->cdr;
   switch (nt) {
-  case NODE_STMTS:
-    codegen_stmts(s, tree, val);
-    break;
-
   case NODE_LAMBDA:
     codegen_lambda(s, tree, val);
     break;
diff --git a/mrbgems/mruby-compiler/core/node.h b/mrbgems/mruby-compiler/core/node.h
index 2b7b3e854..56535db5a 100644
--- a/mrbgems/mruby-compiler/core/node.h
+++ b/mrbgems/mruby-compiler/core/node.h
@@ -870,6 +870,11 @@ struct mrb_ast_ensure_node {
   struct mrb_ast_node *ensure_clause;
 };
 
+struct mrb_ast_stmts_node {
+  struct mrb_ast_var_header hdr;
+  struct mrb_ast_node *stmts;        /* Cons-list of statements */
+};
+
 struct mrb_ast_iter_node {
   struct mrb_ast_var_header hdr;
   struct mrb_ast_node *vars;
@@ -924,6 +929,7 @@ struct mrb_ast_sdef_node {
 #define scope_node(n) ((struct mrb_ast_scope_node*)(n))
 #define begin_node(n) ((struct mrb_ast_begin_node*)(n))
 #define ensure_node(n) ((struct mrb_ast_ensure_node*)(n))
+#define stmts_node(n) ((struct mrb_ast_stmts_node*)(n))
 #define iter_node(n) ((struct mrb_ast_iter_node*)(n))
 #define when_node(n) ((struct mrb_ast_when_node*)(n))
 #define alias_node(n) ((struct mrb_ast_alias_node*)(n))
diff --git a/mrbgems/mruby-compiler/core/parse.y b/mrbgems/mruby-compiler/core/parse.y
index 962d307e5..91998bd80 100644
--- a/mrbgems/mruby-compiler/core/parse.y
+++ b/mrbgems/mruby-compiler/core/parse.y
@@ -492,16 +492,18 @@ new_scope(parser_state *p, node *body)
 static node*
 new_stmts(parser_state *p, node *body)
 {
-  if (body) {
-    /* If body is already a NODE_STMTS, just return it directly */
-    if (node_to_type(body->car) == NODE_STMTS) {
-      return body;
-    }
-    return list2((node*)NODE_STMTS, body);
-  }
-  return cons_head((node*)NODE_STMTS, 0);
+  size_t total_size = sizeof(struct mrb_ast_stmts_node);
+  enum mrb_ast_size_class class = size_to_class(total_size);
+
+  struct mrb_ast_stmts_node *n = (struct mrb_ast_stmts_node*)parser_alloc_var(p, total_size, class);
+
+  init_var_header(&n->hdr, p, NODE_STMTS, class);
+  n->stmts = body ? list1(body) : 0;  /* Wrap single statement in cons-list */
+
+  return cons_head((node*)NODE_VARIABLE, (node*)n);
 }
 
+
 /* (:begin body) - Always use variable-sized nodes */
 static node*
 new_begin(parser_state *p, node *body)
@@ -2668,7 +2670,9 @@ stmts           : none
                     }
                 | stmts terms stmt
                     {
-                      $$ = push($1, newline_node($3));
+                      /* Update the cons-list inside the existing variable-sized node */
+                      STMTS_NODE_STMTS($1->cdr) = push(STMTS_NODE_STMTS($1->cdr), newline_node($3));
+                      $$ = $1;
                     }
                 | error stmt
                     {
@@ -7652,7 +7656,7 @@ mrb_parser_new(mrb_state *mrb)
     p->var_alloc_counts[i] = 0;
   }
   p->var_total_allocated = 0;
-  p->var_nodes_enabled = TRUE;   /* Enable variable-sized nodes by default */
+  p->var_nodes_enabled = TRUE;
 
   return p;
 }
diff --git a/mrbgems/mruby-compiler/core/y.tab.c b/mrbgems/mruby-compiler/core/y.tab.c
index 0aa18ab52..b9e889566 100644
--- a/mrbgems/mruby-compiler/core/y.tab.c
+++ b/mrbgems/mruby-compiler/core/y.tab.c
@@ -554,16 +554,18 @@ new_scope(parser_state *p, node *body)
 static node*
 new_stmts(parser_state *p, node *body)
 {
-  if (body) {
-    /* If body is already a NODE_STMTS, just return it directly */
-    if (node_to_type(body->car) == NODE_STMTS) {
-      return body;
-    }
-    return list2((node*)NODE_STMTS, body);
-  }
-  return cons_head((node*)NODE_STMTS, 0);
+  size_t total_size = sizeof(struct mrb_ast_stmts_node);
+  enum mrb_ast_size_class class = size_to_class(total_size);
+
+  struct mrb_ast_stmts_node *n = (struct mrb_ast_stmts_node*)parser_alloc_var(p, total_size, class);
+
+  init_var_header(&n->hdr, p, NODE_STMTS, class);
+  n->stmts = body ? list1(body) : 0;  /* Wrap single statement in cons-list */
+
+  return cons_head((node*)NODE_VARIABLE, (node*)n);
 }
 
+
 /* (:begin body) - Always use variable-sized nodes */
 static node*
 new_begin(parser_state *p, node *body)
@@ -2462,7 +2464,7 @@ prohibit_literals(parser_state *p, node *n)
 /* xxx ----------------------------- */
 
 
-#line 2466 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 2468 "mrbgems/mruby-compiler/core/y.tab.c"
 
 # ifndef YY_CAST
 #  ifdef __cplusplus
@@ -2633,7 +2635,7 @@ extern int yydebug;
 #if ! defined YYSTYPE && ! defined YYSTYPE_IS_DECLARED
 union YYSTYPE
 {
-#line 2409 "mrbgems/mruby-compiler/core/parse.y"
+#line 2411 "mrbgems/mruby-compiler/core/parse.y"
 
     node *nd;
     mrb_sym id;
@@ -2641,7 +2643,7 @@ union YYSTYPE
     stack_type stack;
     const struct vtable *vars;
 
-#line 2645 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 2647 "mrbgems/mruby-compiler/core/y.tab.c"
 
 };
 typedef union YYSTYPE YYSTYPE;
@@ -3400,69 +3402,69 @@ static const yytype_uint8 yytranslate[] =
 /* YYRLINE[YYN] -- Source line where rule number YYN was defined.  */
 static const yytype_int16 yyrline[] =
 {
-       0,  2580,  2580,  2580,  2590,  2596,  2600,  2604,  2608,  2614,
-    2616,  2615,  2629,  2655,  2661,  2665,  2669,  2673,  2679,  2679,
-    2683,  2687,  2691,  2695,  2704,  2713,  2717,  2722,  2723,  2727,
-    2731,  2735,  2739,  2745,  2748,  2752,  2756,  2760,  2764,  2768,
-    2773,  2777,  2786,  2795,  2804,  2813,  2820,  2821,  2825,  2828,
-    2829,  2833,  2837,  2841,  2845,  2848,  2858,  2857,  2872,  2881,
-    2882,  2885,  2886,  2893,  2892,  2907,  2911,  2916,  2920,  2925,
-    2929,  2934,  2938,  2942,  2946,  2950,  2956,  2960,  2966,  2967,
-    2973,  2977,  2981,  2985,  2989,  2993,  2997,  3001,  3005,  3009,
-    3015,  3016,  3022,  3026,  3032,  3036,  3042,  3046,  3050,  3054,
-    3058,  3062,  3068,  3074,  3081,  3085,  3089,  3093,  3097,  3101,
-    3107,  3113,  3118,  3124,  3128,  3131,  3135,  3139,  3146,  3147,
-    3148,  3149,  3154,  3161,  3162,  3165,  3169,  3169,  3175,  3176,
-    3177,  3178,  3179,  3180,  3181,  3182,  3183,  3184,  3185,  3186,
-    3187,  3188,  3189,  3190,  3191,  3192,  3193,  3194,  3195,  3196,
-    3197,  3198,  3199,  3200,  3201,  3202,  3203,  3204,  3207,  3207,
-    3207,  3208,  3208,  3209,  3209,  3209,  3210,  3210,  3210,  3210,
-    3211,  3211,  3211,  3212,  3212,  3212,  3213,  3213,  3213,  3213,
-    3214,  3214,  3214,  3214,  3215,  3215,  3215,  3215,  3216,  3216,
-    3216,  3216,  3217,  3217,  3217,  3217,  3218,  3218,  3221,  3225,
-    3229,  3233,  3237,  3241,  3245,  3250,  3255,  3260,  3264,  3268,
-    3272,  3276,  3280,  3284,  3288,  3292,  3296,  3300,  3304,  3308,
-    3312,  3316,  3320,  3324,  3328,  3332,  3336,  3340,  3344,  3348,
-    3352,  3356,  3360,  3364,  3368,  3372,  3376,  3380,  3384,  3388,
-    3392,  3396,  3400,  3404,  3408,  3417,  3426,  3435,  3444,  3450,
-    3451,  3455,  3459,  3465,  3469,  3476,  3480,  3489,  3506,  3507,
-    3510,  3511,  3512,  3516,  3520,  3526,  3531,  3535,  3539,  3543,
-    3549,  3549,  3560,  3564,  3570,  3574,  3580,  3583,  3588,  3592,
-    3596,  3601,  3605,  3611,  3616,  3620,  3626,  3627,  3631,  3635,
-    3636,  3637,  3638,  3639,  3644,  3643,  3655,  3659,  3654,  3664,
-    3664,  3668,  3672,  3676,  3680,  3684,  3688,  3692,  3696,  3700,
-    3704,  3708,  3709,  3715,  3722,  3714,  3735,  3743,  3751,  3751,
-    3751,  3758,  3758,  3758,  3765,  3771,  3776,  3778,  3775,  3787,
-    3785,  3803,  3808,  3801,  3825,  3823,  3839,  3849,  3860,  3864,
-    3868,  3872,  3878,  3885,  3886,  3887,  3890,  3891,  3894,  3895,
-    3903,  3904,  3910,  3914,  3917,  3921,  3925,  3929,  3934,  3938,
-    3942,  3946,  3952,  3951,  3961,  3965,  3969,  3973,  3979,  3984,
-    3989,  3993,  3997,  4001,  4005,  4009,  4013,  4017,  4021,  4025,
-    4029,  4033,  4037,  4041,  4045,  4051,  4056,  4063,  4063,  4067,
-    4072,  4078,  4082,  4088,  4089,  4092,  4097,  4100,  4104,  4110,
-    4114,  4121,  4120,  4137,  4142,  4146,  4151,  4158,  4162,  4166,
-    4170,  4174,  4178,  4182,  4186,  4190,  4197,  4196,  4211,  4210,
-    4226,  4234,  4243,  4246,  4253,  4256,  4260,  4261,  4264,  4268,
-    4271,  4275,  4278,  4279,  4280,  4281,  4284,  4285,  4291,  4296,
-    4301,  4306,  4312,  4313,  4319,  4325,  4324,  4336,  4340,  4346,
-    4350,  4356,  4365,  4376,  4379,  4380,  4383,  4389,  4395,  4396,
-    4399,  4406,  4405,  4420,  4424,  4432,  4436,  4448,  4455,  4462,
-    4463,  4464,  4465,  4466,  4470,  4476,  4480,  4488,  4489,  4490,
-    4494,  4500,  4504,  4508,  4512,  4516,  4522,  4526,  4532,  4536,
-    4540,  4544,  4548,  4552,  4556,  4564,  4571,  4577,  4578,  4582,
-    4586,  4585,  4602,  4603,  4606,  4612,  4616,  4622,  4623,  4627,
-    4631,  4637,  4641,  4647,  4653,  4660,  4666,  4673,  4677,  4683,
-    4687,  4693,  4694,  4697,  4701,  4707,  4711,  4715,  4719,  4725,
-    4730,  4735,  4739,  4743,  4747,  4751,  4755,  4759,  4763,  4767,
-    4771,  4775,  4779,  4783,  4787,  4792,  4798,  4803,  4808,  4813,
-    4818,  4825,  4829,  4836,  4841,  4840,  4852,  4856,  4862,  4870,
-    4878,  4886,  4890,  4896,  4900,  4906,  4907,  4910,  4915,  4922,
-    4923,  4926,  4930,  4936,  4940,  4946,  4952,  4952,  4959,  4960,
-    4966,  4970,  4976,  4982,  4987,  4991,  4996,  5001,  5017,  5022,
-    5028,  5029,  5030,  5033,  5034,  5035,  5036,  5039,  5040,  5041,
-    5044,  5045,  5048,  5052,  5058,  5059,  5065,  5066,  5069,  5070,
-    5073,  5076,  5077,  5078,  5081,  5082,  5085,  5090,  5093,  5094,
-    5098
+       0,  2582,  2582,  2582,  2592,  2598,  2602,  2606,  2610,  2616,
+    2618,  2617,  2631,  2657,  2663,  2667,  2671,  2677,  2683,  2683,
+    2687,  2691,  2695,  2699,  2708,  2717,  2721,  2726,  2727,  2731,
+    2735,  2739,  2743,  2749,  2752,  2756,  2760,  2764,  2768,  2772,
+    2777,  2781,  2790,  2799,  2808,  2817,  2824,  2825,  2829,  2832,
+    2833,  2837,  2841,  2845,  2849,  2852,  2862,  2861,  2876,  2885,
+    2886,  2889,  2890,  2897,  2896,  2911,  2915,  2920,  2924,  2929,
+    2933,  2938,  2942,  2946,  2950,  2954,  2960,  2964,  2970,  2971,
+    2977,  2981,  2985,  2989,  2993,  2997,  3001,  3005,  3009,  3013,
+    3019,  3020,  3026,  3030,  3036,  3040,  3046,  3050,  3054,  3058,
+    3062,  3066,  3072,  3078,  3085,  3089,  3093,  3097,  3101,  3105,
+    3111,  3117,  3122,  3128,  3132,  3135,  3139,  3143,  3150,  3151,
+    3152,  3153,  3158,  3165,  3166,  3169,  3173,  3173,  3179,  3180,
+    3181,  3182,  3183,  3184,  3185,  3186,  3187,  3188,  3189,  3190,
+    3191,  3192,  3193,  3194,  3195,  3196,  3197,  3198,  3199,  3200,
+    3201,  3202,  3203,  3204,  3205,  3206,  3207,  3208,  3211,  3211,
+    3211,  3212,  3212,  3213,  3213,  3213,  3214,  3214,  3214,  3214,
+    3215,  3215,  3215,  3216,  3216,  3216,  3217,  3217,  3217,  3217,
+    3218,  3218,  3218,  3218,  3219,  3219,  3219,  3219,  3220,  3220,
+    3220,  3220,  3221,  3221,  3221,  3221,  3222,  3222,  3225,  3229,
+    3233,  3237,  3241,  3245,  3249,  3254,  3259,  3264,  3268,  3272,
+    3276,  3280,  3284,  3288,  3292,  3296,  3300,  3304,  3308,  3312,
+    3316,  3320,  3324,  3328,  3332,  3336,  3340,  3344,  3348,  3352,
+    3356,  3360,  3364,  3368,  3372,  3376,  3380,  3384,  3388,  3392,
+    3396,  3400,  3404,  3408,  3412,  3421,  3430,  3439,  3448,  3454,
+    3455,  3459,  3463,  3469,  3473,  3480,  3484,  3493,  3510,  3511,
+    3514,  3515,  3516,  3520,  3524,  3530,  3535,  3539,  3543,  3547,
+    3553,  3553,  3564,  3568,  3574,  3578,  3584,  3587,  3592,  3596,
+    3600,  3605,  3609,  3615,  3620,  3624,  3630,  3631,  3635,  3639,
+    3640,  3641,  3642,  3643,  3648,  3647,  3659,  3663,  3658,  3668,
+    3668,  3672,  3676,  3680,  3684,  3688,  3692,  3696,  3700,  3704,
+    3708,  3712,  3713,  3719,  3726,  3718,  3739,  3747,  3755,  3755,
+    3755,  3762,  3762,  3762,  3769,  3775,  3780,  3782,  3779,  3791,
+    3789,  3807,  3812,  3805,  3829,  3827,  3843,  3853,  3864,  3868,
+    3872,  3876,  3882,  3889,  3890,  3891,  3894,  3895,  3898,  3899,
+    3907,  3908,  3914,  3918,  3921,  3925,  3929,  3933,  3938,  3942,
+    3946,  3950,  3956,  3955,  3965,  3969,  3973,  3977,  3983,  3988,
+    3993,  3997,  4001,  4005,  4009,  4013,  4017,  4021,  4025,  4029,
+    4033,  4037,  4041,  4045,  4049,  4055,  4060,  4067,  4067,  4071,
+    4076,  4082,  4086,  4092,  4093,  4096,  4101,  4104,  4108,  4114,
+    4118,  4125,  4124,  4141,  4146,  4150,  4155,  4162,  4166,  4170,
+    4174,  4178,  4182,  4186,  4190,  4194,  4201,  4200,  4215,  4214,
+    4230,  4238,  4247,  4250,  4257,  4260,  4264,  4265,  4268,  4272,
+    4275,  4279,  4282,  4283,  4284,  4285,  4288,  4289,  4295,  4300,
+    4305,  4310,  4316,  4317,  4323,  4329,  4328,  4340,  4344,  4350,
+    4354,  4360,  4369,  4380,  4383,  4384,  4387,  4393,  4399,  4400,
+    4403,  4410,  4409,  4424,  4428,  4436,  4440,  4452,  4459,  4466,
+    4467,  4468,  4469,  4470,  4474,  4480,  4484,  4492,  4493,  4494,
+    4498,  4504,  4508,  4512,  4516,  4520,  4526,  4530,  4536,  4540,
+    4544,  4548,  4552,  4556,  4560,  4568,  4575,  4581,  4582,  4586,
+    4590,  4589,  4606,  4607,  4610,  4616,  4620,  4626,  4627,  4631,
+    4635,  4641,  4645,  4651,  4657,  4664,  4670,  4677,  4681,  4687,
+    4691,  4697,  4698,  4701,  4705,  4711,  4715,  4719,  4723,  4729,
+    4734,  4739,  4743,  4747,  4751,  4755,  4759,  4763,  4767,  4771,
+    4775,  4779,  4783,  4787,  4791,  4796,  4802,  4807,  4812,  4817,
+    4822,  4829,  4833,  4840,  4845,  4844,  4856,  4860,  4866,  4874,
+    4882,  4890,  4894,  4900,  4904,  4910,  4911,  4914,  4919,  4926,
+    4927,  4930,  4934,  4940,  4944,  4950,  4956,  4956,  4963,  4964,
+    4970,  4974,  4980,  4986,  4991,  4995,  5000,  5005,  5021,  5026,
+    5032,  5033,  5034,  5037,  5038,  5039,  5040,  5043,  5044,  5045,
+    5048,  5049,  5052,  5056,  5062,  5063,  5069,  5070,  5073,  5074,
+    5077,  5080,  5081,  5082,  5085,  5086,  5089,  5094,  5097,  5098,
+    5102
 };
 #endif
 
@@ -7439,7 +7441,7 @@ YYLTYPE yylloc = yyloc_default;
 
 
 
-#line 7443 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7445 "mrbgems/mruby-compiler/core/y.tab.c"
 
   yylsp[0] = yylloc;
   goto yysetstate;
@@ -7652,84 +7654,84 @@ yyreduce:
   switch (yyn)
     {
   case 2: /* $@1: %empty  */
-#line 2580 "mrbgems/mruby-compiler/core/parse.y"
+#line 2582 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       p->lstate = EXPR_BEG;
                       if (!p->locals) p->locals = cons(0,0);
                     }
-#line 7661 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7663 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 3: /* program: $@1 top_compstmt  */
-#line 2585 "mrbgems/mruby-compiler/core/parse.y"
+#line 2587 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       p->tree = new_scope(p, (yyvsp[0].nd));
                     }
-#line 7669 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7671 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 4: /* top_compstmt: top_stmts opt_terms  */
-#line 2591 "mrbgems/mruby-compiler/core/parse.y"
+#line 2593 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[-1].nd);
                     }
-#line 7677 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7679 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 5: /* top_stmts: none  */
-#line 2597 "mrbgems/mruby-compiler/core/parse.y"
+#line 2599 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_stmts(p, 0);
                     }
-#line 7685 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7687 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 6: /* top_stmts: top_stmt  */
-#line 2601 "mrbgems/mruby-compiler/core/parse.y"
+#line 2603 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_stmts(p, (yyvsp[0].nd));
                     }
-#line 7693 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7695 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 7: /* top_stmts: top_stmts terms top_stmt  */
-#line 2605 "mrbgems/mruby-compiler/core/parse.y"
+#line 2607 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = push((yyvsp[-2].nd), newline_node((yyvsp[0].nd)));
                     }
-#line 7701 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7703 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 8: /* top_stmts: error top_stmt  */
-#line 2609 "mrbgems/mruby-compiler/core/parse.y"
+#line 2611 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_stmts(p, 0);
                     }
-#line 7709 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7711 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 10: /* @2: %empty  */
-#line 2616 "mrbgems/mruby-compiler/core/parse.y"
+#line 2618 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = local_switch(p);
                       nvars_block(p);
                     }
-#line 7718 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7720 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 11: /* top_stmt: "'BEGIN'" @2 '{' top_compstmt '}'  */
-#line 2621 "mrbgems/mruby-compiler/core/parse.y"
+#line 2623 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       yyerror(&(yylsp[-4]), p, "BEGIN not supported");
                       local_resume(p, (yyvsp[-3].nd));
                       nvars_unnest(p);
                       (yyval.nd) = 0;
                     }
-#line 7729 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7731 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 12: /* bodystmt: compstmt opt_rescue opt_else opt_ensure  */
-#line 2633 "mrbgems/mruby-compiler/core/parse.y"
+#line 2635 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       if ((yyvsp[-2].nd)) {
                         (yyval.nd) = new_rescue(p, (yyvsp[-3].nd), (yyvsp[-2].nd), (yyvsp[-1].nd));
@@ -7750,89 +7752,91 @@ yyreduce:
                         }
                       }
                     }
-#line 7754 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7756 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 13: /* compstmt: stmts opt_terms  */
-#line 2656 "mrbgems/mruby-compiler/core/parse.y"
+#line 2658 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[-1].nd);
                     }
-#line 7762 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7764 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 14: /* stmts: none  */
-#line 2662 "mrbgems/mruby-compiler/core/parse.y"
+#line 2664 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_stmts(p, 0);
                     }
-#line 7770 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7772 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 15: /* stmts: stmt  */
-#line 2666 "mrbgems/mruby-compiler/core/parse.y"
+#line 2668 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_stmts(p, (yyvsp[0].nd));
                     }
-#line 7778 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7780 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 16: /* stmts: stmts terms stmt  */
-#line 2670 "mrbgems/mruby-compiler/core/parse.y"
+#line 2672 "mrbgems/mruby-compiler/core/parse.y"
                     {
-                      (yyval.nd) = push((yyvsp[-2].nd), newline_node((yyvsp[0].nd)));
+                      /* Update the cons-list inside the existing variable-sized node */
+                      STMTS_NODE_STMTS((yyvsp[-2].nd)->cdr) = push(STMTS_NODE_STMTS((yyvsp[-2].nd)->cdr), newline_node((yyvsp[0].nd)));
+                      (yyval.nd) = (yyvsp[-2].nd);
                     }
-#line 7786 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7790 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 17: /* stmts: error stmt  */
-#line 2674 "mrbgems/mruby-compiler/core/parse.y"
+#line 2678 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_stmts(p, (yyvsp[0].nd));
                     }
-#line 7794 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7798 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 18: /* $@3: %empty  */
-#line 2679 "mrbgems/mruby-compiler/core/parse.y"
+#line 2683 "mrbgems/mruby-compiler/core/parse.y"
                                      {p->lstate = EXPR_FNAME;}
-#line 7800 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7804 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 19: /* stmt: "'alias'" fsym $@3 fsym  */
-#line 2680 "mrbgems/mruby-compiler/core/parse.y"
+#line 2684 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_alias(p, (yyvsp[-2].id), (yyvsp[0].id));
                     }
-#line 7808 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7812 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 20: /* stmt: "'undef'" undef_list  */
-#line 2684 "mrbgems/mruby-compiler/core/parse.y"
+#line 2688 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_undef(p, (yyvsp[0].nd));
                     }
-#line 7816 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7820 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 21: /* stmt: stmt "'if' modifier" expr_value  */
-#line 2688 "mrbgems/mruby-compiler/core/parse.y"
+#line 2692 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_if(p, cond((yyvsp[0].nd)), (yyvsp[-2].nd), 0);
                     }
-#line 7824 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7828 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 22: /* stmt: stmt "'unless' modifier" expr_value  */
-#line 2692 "mrbgems/mruby-compiler/core/parse.y"
+#line 2696 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_if(p, cond((yyvsp[0].nd)), 0, (yyvsp[-2].nd));
                     }
-#line 7832 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7836 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 23: /* stmt: stmt "'while' modifier" expr_value  */
-#line 2696 "mrbgems/mruby-compiler/core/parse.y"
+#line 2700 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       if ((yyvsp[-2].nd) && node_type_p((yyvsp[-2].nd), NODE_BEGIN)) {
                         (yyval.nd) = new_while_mod(p, cond((yyvsp[0].nd)), (yyvsp[-2].nd));
@@ -7841,11 +7845,11 @@ yyreduce:
                         (yyval.nd) = new_while(p, cond((yyvsp[0].nd)), (yyvsp[-2].nd));
                       }
                     }
-#line 7845 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7849 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 24: /* stmt: stmt "'until' modifier" expr_value  */
-#line 2705 "mrbgems/mruby-compiler/core/parse.y"
+#line 2709 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       if ((yyvsp[-2].nd) && node_type_p((yyvsp[-2].nd), NODE_BEGIN)) {
                         (yyval.nd) = new_until_mod(p, cond((yyvsp[0].nd)), (yyvsp[-2].nd));
@@ -7854,127 +7858,127 @@ yyreduce:
                         (yyval.nd) = new_until(p, cond((yyvsp[0].nd)), (yyvsp[-2].nd));
                       }
                     }
-#line 7858 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7862 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 25: /* stmt: stmt "'rescue' modifier" stmt  */
-#line 2714 "mrbgems/mruby-compiler/core/parse.y"
+#line 2718 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_mod_rescue(p, (yyvsp[-2].nd), (yyvsp[0].nd));
                     }
-#line 7866 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7870 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 26: /* stmt: "'END'" '{' compstmt '}'  */
-#line 2718 "mrbgems/mruby-compiler/core/parse.y"
+#line 2722 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       yyerror(&(yylsp[-3]), p, "END not supported");
                       (yyval.nd) = new_postexe(p, (yyvsp[-1].nd));
                     }
-#line 7875 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7879 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 28: /* stmt: mlhs '=' command_call  */
-#line 2724 "mrbgems/mruby-compiler/core/parse.y"
+#line 2728 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_masgn(p, (yyvsp[-2].nd), (yyvsp[0].nd));
                     }
-#line 7883 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7887 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 29: /* stmt: lhs '=' mrhs  */
-#line 2728 "mrbgems/mruby-compiler/core/parse.y"
+#line 2732 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_asgn(p, (yyvsp[-2].nd), new_array(p, (yyvsp[0].nd)));
                     }
-#line 7891 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7895 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 30: /* stmt: mlhs '=' arg  */
-#line 2732 "mrbgems/mruby-compiler/core/parse.y"
+#line 2736 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_masgn(p, (yyvsp[-2].nd), (yyvsp[0].nd));
                     }
-#line 7899 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7903 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 31: /* stmt: mlhs '=' mrhs  */
-#line 2736 "mrbgems/mruby-compiler/core/parse.y"
+#line 2740 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_masgn(p, (yyvsp[-2].nd), new_array(p, (yyvsp[0].nd)));
                     }
-#line 7907 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7911 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 32: /* stmt: arg "=>" "local variable or method"  */
-#line 2740 "mrbgems/mruby-compiler/core/parse.y"
+#line 2744 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       node *lhs = new_lvar(p, (yyvsp[0].id));
                       assignable(p, lhs);
                       (yyval.nd) = new_asgn(p, lhs, (yyvsp[-2].nd));
                     }
-#line 7917 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7921 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 34: /* command_asgn: lhs '=' command_rhs  */
-#line 2749 "mrbgems/mruby-compiler/core/parse.y"
+#line 2753 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_asgn(p, (yyvsp[-2].nd), (yyvsp[0].nd));
                     }
-#line 7925 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7929 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 35: /* command_asgn: var_lhs tOP_ASGN command_rhs  */
-#line 2753 "mrbgems/mruby-compiler/core/parse.y"
+#line 2757 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_op_asgn(p, (yyvsp[-2].nd), (yyvsp[-1].id), (yyvsp[0].nd));
                     }
-#line 7933 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7937 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 36: /* command_asgn: primary_value '[' opt_call_args ']' tOP_ASGN command_rhs  */
-#line 2757 "mrbgems/mruby-compiler/core/parse.y"
+#line 2761 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_op_asgn(p, new_call(p, (yyvsp[-5].nd), intern_op(aref), (yyvsp[-3].nd), '.'), (yyvsp[-1].id), (yyvsp[0].nd));
                     }
-#line 7941 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7945 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 37: /* command_asgn: primary_value call_op "local variable or method" tOP_ASGN command_rhs  */
-#line 2761 "mrbgems/mruby-compiler/core/parse.y"
-                    {
-                      (yyval.nd) = new_op_asgn(p, new_call(p, (yyvsp[-4].nd), (yyvsp[-2].id), 0, (yyvsp[-3].num)), (yyvsp[-1].id), (yyvsp[0].nd));
-                    }
-#line 7949 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 38: /* command_asgn: primary_value call_op "constant" tOP_ASGN command_rhs  */
 #line 2765 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_op_asgn(p, new_call(p, (yyvsp[-4].nd), (yyvsp[-2].id), 0, (yyvsp[-3].num)), (yyvsp[-1].id), (yyvsp[0].nd));
                     }
-#line 7957 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7953 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 38: /* command_asgn: primary_value call_op "constant" tOP_ASGN command_rhs  */
+#line 2769 "mrbgems/mruby-compiler/core/parse.y"
+                    {
+                      (yyval.nd) = new_op_asgn(p, new_call(p, (yyvsp[-4].nd), (yyvsp[-2].id), 0, (yyvsp[-3].num)), (yyvsp[-1].id), (yyvsp[0].nd));
+                    }
+#line 7961 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 39: /* command_asgn: primary_value "::" "constant" tOP_ASGN command_call  */
-#line 2769 "mrbgems/mruby-compiler/core/parse.y"
+#line 2773 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       yyerror(&(yylsp[-4]), p, "constant re-assignment");
                       (yyval.nd) = 0;
                     }
-#line 7966 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7970 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 40: /* command_asgn: primary_value "::" "local variable or method" tOP_ASGN command_rhs  */
-#line 2774 "mrbgems/mruby-compiler/core/parse.y"
+#line 2778 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_op_asgn(p, new_call(p, (yyvsp[-4].nd), (yyvsp[-2].id), 0, tCOLON2), (yyvsp[-1].id), (yyvsp[0].nd));
                     }
-#line 7974 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7978 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 41: /* command_asgn: defn_head f_opt_arglist_paren '=' command  */
-#line 2778 "mrbgems/mruby-compiler/core/parse.y"
+#line 2782 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[-3].nd);
                       endless_method_name(p, (yyvsp[-3].nd));
@@ -7983,11 +7987,11 @@ yyreduce:
                       nvars_unnest(p);
                       p->in_def--;
                     }
-#line 7987 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7991 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 42: /* command_asgn: defn_head f_opt_arglist_paren '=' command "'rescue' modifier" arg  */
-#line 2787 "mrbgems/mruby-compiler/core/parse.y"
+#line 2791 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[-5].nd);
                       endless_method_name(p, (yyvsp[-5].nd));
@@ -7996,11 +8000,11 @@ yyreduce:
                       nvars_unnest(p);
                       p->in_def--;
                     }
-#line 8000 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8004 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 43: /* command_asgn: defs_head f_opt_arglist_paren '=' command  */
-#line 2796 "mrbgems/mruby-compiler/core/parse.y"
+#line 2800 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[-3].nd);
                       void_expr_error(p, (yyvsp[0].nd));
@@ -8009,11 +8013,11 @@ yyreduce:
                       p->in_def--;
                       p->in_single--;
                     }
-#line 8013 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8017 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 44: /* command_asgn: defs_head f_opt_arglist_paren '=' command "'rescue' modifier" arg  */
-#line 2805 "mrbgems/mruby-compiler/core/parse.y"
+#line 2809 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[-5].nd);
                       void_expr_error(p, (yyvsp[-2].nd));
@@ -8022,79 +8026,79 @@ yyreduce:
                       p->in_def--;
                       p->in_single--;
                     }
-#line 8026 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8030 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 45: /* command_asgn: backref tOP_ASGN command_rhs  */
-#line 2814 "mrbgems/mruby-compiler/core/parse.y"
+#line 2818 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       backref_error(p, (yyvsp[-2].nd));
                       (yyval.nd) = new_stmts(p, 0);
                     }
-#line 8035 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8039 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 47: /* command_rhs: command_call "'rescue' modifier" stmt  */
-#line 2822 "mrbgems/mruby-compiler/core/parse.y"
+#line 2826 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_mod_rescue(p, (yyvsp[-2].nd), (yyvsp[0].nd));
                     }
-#line 8043 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8047 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 50: /* expr: expr "'and'" expr  */
-#line 2830 "mrbgems/mruby-compiler/core/parse.y"
+#line 2834 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_and(p, (yyvsp[-2].nd), (yyvsp[0].nd));
                     }
-#line 8051 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8055 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 51: /* expr: expr "'or'" expr  */
-#line 2834 "mrbgems/mruby-compiler/core/parse.y"
+#line 2838 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_or(p, (yyvsp[-2].nd), (yyvsp[0].nd));
                     }
-#line 8059 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8063 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 52: /* expr: "'not'" opt_nl expr  */
-#line 2838 "mrbgems/mruby-compiler/core/parse.y"
-                    {
-                      (yyval.nd) = call_uni_op(p, cond((yyvsp[0].nd)), "!");
-                    }
-#line 8067 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 53: /* expr: '!' command_call  */
 #line 2842 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = call_uni_op(p, cond((yyvsp[0].nd)), "!");
                     }
-#line 8075 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8071 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 53: /* expr: '!' command_call  */
+#line 2846 "mrbgems/mruby-compiler/core/parse.y"
+                    {
+                      (yyval.nd) = call_uni_op(p, cond((yyvsp[0].nd)), "!");
+                    }
+#line 8079 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 55: /* defn_head: "'def'" fname  */
-#line 2849 "mrbgems/mruby-compiler/core/parse.y"
+#line 2853 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_def(p, (yyvsp[0].id), int_to_node(p->cmdarg_stack), local_switch(p));
                       p->cmdarg_stack = 0;
                       p->in_def++;
                       nvars_block(p);
                     }
-#line 8086 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8090 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 56: /* $@4: %empty  */
-#line 2858 "mrbgems/mruby-compiler/core/parse.y"
+#line 2862 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       p->lstate = EXPR_FNAME;
                     }
-#line 8094 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8098 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 57: /* defs_head: "'def'" singleton dot_or_colon $@4 fname  */
-#line 2862 "mrbgems/mruby-compiler/core/parse.y"
+#line 2866 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_sdef(p, (yyvsp[-3].nd), (yyvsp[0].id), int_to_node(p->cmdarg_stack), local_switch(p));
                       p->cmdarg_stack = 0;
@@ -8103,1054 +8107,1054 @@ yyreduce:
                       nvars_block(p);
                       p->lstate = EXPR_ENDFN; /* force for args */
                     }
-#line 8107 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8111 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 58: /* expr_value: expr  */
-#line 2873 "mrbgems/mruby-compiler/core/parse.y"
+#line 2877 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       if (!(yyvsp[0].nd)) (yyval.nd) = new_nil(p);
                       else {
                         (yyval.nd) = (yyvsp[0].nd);
                       }
                     }
-#line 8118 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8122 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 62: /* block_command: block_call call_op2 operation2 command_args  */
-#line 2887 "mrbgems/mruby-compiler/core/parse.y"
+#line 2891 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_call(p, (yyvsp[-3].nd), (yyvsp[-1].id), (yyvsp[0].nd), (yyvsp[-2].num));
                     }
-#line 8126 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8130 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 63: /* $@5: %empty  */
-#line 2893 "mrbgems/mruby-compiler/core/parse.y"
+#line 2897 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       local_nest(p);
                       nvars_nest(p);
                     }
-#line 8135 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8139 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 64: /* cmd_brace_block: "{" $@5 opt_block_param compstmt '}'  */
-#line 2900 "mrbgems/mruby-compiler/core/parse.y"
+#line 2904 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_block(p, (yyvsp[-2].nd), (yyvsp[-1].nd));
                       local_unnest(p);
                       nvars_unnest(p);
                     }
-#line 8145 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8149 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 65: /* command: operation command_args  */
-#line 2908 "mrbgems/mruby-compiler/core/parse.y"
+#line 2912 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_fcall(p, (yyvsp[-1].id), (yyvsp[0].nd));
                     }
-#line 8153 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8157 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 66: /* command: operation command_args cmd_brace_block  */
-#line 2912 "mrbgems/mruby-compiler/core/parse.y"
+#line 2916 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       args_with_block(p, (yyvsp[-1].nd), (yyvsp[0].nd));
                       (yyval.nd) = new_fcall(p, (yyvsp[-2].id), (yyvsp[-1].nd));
                     }
-#line 8162 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8166 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 67: /* command: primary_value call_op operation2 command_args  */
-#line 2917 "mrbgems/mruby-compiler/core/parse.y"
+#line 2921 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_call(p, (yyvsp[-3].nd), (yyvsp[-1].id), (yyvsp[0].nd), (yyvsp[-2].num));
                     }
-#line 8170 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8174 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 68: /* command: primary_value call_op operation2 command_args cmd_brace_block  */
-#line 2921 "mrbgems/mruby-compiler/core/parse.y"
+#line 2925 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       args_with_block(p, (yyvsp[-1].nd), (yyvsp[0].nd));
                       (yyval.nd) = new_call(p, (yyvsp[-4].nd), (yyvsp[-2].id), (yyvsp[-1].nd), (yyvsp[-3].num));
                    }
-#line 8179 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8183 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 69: /* command: primary_value "::" operation2 command_args  */
-#line 2926 "mrbgems/mruby-compiler/core/parse.y"
+#line 2930 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_call(p, (yyvsp[-3].nd), (yyvsp[-1].id), (yyvsp[0].nd), tCOLON2);
                     }
-#line 8187 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8191 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 70: /* command: primary_value "::" operation2 command_args cmd_brace_block  */
-#line 2930 "mrbgems/mruby-compiler/core/parse.y"
+#line 2934 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       args_with_block(p, (yyvsp[-1].nd), (yyvsp[0].nd));
                       (yyval.nd) = new_call(p, (yyvsp[-4].nd), (yyvsp[-2].id), (yyvsp[-1].nd), tCOLON2);
                     }
-#line 8196 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8200 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 71: /* command: "'super'" command_args  */
-#line 2935 "mrbgems/mruby-compiler/core/parse.y"
+#line 2939 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_super(p, (yyvsp[0].nd));
                     }
-#line 8204 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8208 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 72: /* command: "'yield'" command_args  */
-#line 2939 "mrbgems/mruby-compiler/core/parse.y"
+#line 2943 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_yield(p, (yyvsp[0].nd));
                     }
-#line 8212 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8216 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 73: /* command: "'return'" call_args  */
-#line 2943 "mrbgems/mruby-compiler/core/parse.y"
+#line 2947 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_return(p, ret_args(p, (yyvsp[0].nd)));
                     }
-#line 8220 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8224 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 74: /* command: "'break'" call_args  */
-#line 2947 "mrbgems/mruby-compiler/core/parse.y"
+#line 2951 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_break(p, ret_args(p, (yyvsp[0].nd)));
                     }
-#line 8228 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8232 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 75: /* command: "'next'" call_args  */
-#line 2951 "mrbgems/mruby-compiler/core/parse.y"
+#line 2955 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_next(p, ret_args(p, (yyvsp[0].nd)));
                     }
-#line 8236 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8240 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 76: /* mlhs: mlhs_basic  */
-#line 2957 "mrbgems/mruby-compiler/core/parse.y"
+#line 2961 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[0].nd);
                     }
-#line 8244 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8248 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 77: /* mlhs: tLPAREN mlhs_inner rparen  */
-#line 2961 "mrbgems/mruby-compiler/core/parse.y"
+#line 2965 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[-1].nd);
                     }
-#line 8252 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8256 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 79: /* mlhs_inner: tLPAREN mlhs_inner rparen  */
-#line 2968 "mrbgems/mruby-compiler/core/parse.y"
+#line 2972 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[-1].nd);
                     }
-#line 8260 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8264 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 80: /* mlhs_basic: mlhs_list  */
-#line 2974 "mrbgems/mruby-compiler/core/parse.y"
+#line 2978 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list1((yyvsp[0].nd));
                     }
-#line 8268 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8272 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 81: /* mlhs_basic: mlhs_list mlhs_item  */
-#line 2978 "mrbgems/mruby-compiler/core/parse.y"
+#line 2982 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list1(push((yyvsp[-1].nd),(yyvsp[0].nd)));
                     }
-#line 8276 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8280 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 82: /* mlhs_basic: mlhs_list "*" mlhs_node  */
-#line 2982 "mrbgems/mruby-compiler/core/parse.y"
+#line 2986 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list2((yyvsp[-2].nd), (yyvsp[0].nd));
                     }
-#line 8284 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8288 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 83: /* mlhs_basic: mlhs_list "*" mlhs_node ',' mlhs_post  */
-#line 2986 "mrbgems/mruby-compiler/core/parse.y"
+#line 2990 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list3((yyvsp[-4].nd), (yyvsp[-2].nd), (yyvsp[0].nd));
                     }
-#line 8292 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8296 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 84: /* mlhs_basic: mlhs_list "*"  */
-#line 2990 "mrbgems/mruby-compiler/core/parse.y"
+#line 2994 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list2((yyvsp[-1].nd), new_nil(p));
                     }
-#line 8300 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8304 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 85: /* mlhs_basic: mlhs_list "*" ',' mlhs_post  */
-#line 2994 "mrbgems/mruby-compiler/core/parse.y"
+#line 2998 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list3((yyvsp[-3].nd), new_nil(p), (yyvsp[0].nd));
                     }
-#line 8308 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8312 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 86: /* mlhs_basic: "*" mlhs_node  */
-#line 2998 "mrbgems/mruby-compiler/core/parse.y"
+#line 3002 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list2(0, (yyvsp[0].nd));
                     }
-#line 8316 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8320 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 87: /* mlhs_basic: "*" mlhs_node ',' mlhs_post  */
-#line 3002 "mrbgems/mruby-compiler/core/parse.y"
+#line 3006 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list3(0, (yyvsp[-2].nd), (yyvsp[0].nd));
                     }
-#line 8324 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8328 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 88: /* mlhs_basic: "*"  */
-#line 3006 "mrbgems/mruby-compiler/core/parse.y"
+#line 3010 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list2(0, new_nil(p));
                     }
-#line 8332 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8336 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 89: /* mlhs_basic: "*" ',' mlhs_post  */
-#line 3010 "mrbgems/mruby-compiler/core/parse.y"
+#line 3014 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list3(0, new_nil(p), (yyvsp[0].nd));
                     }
-#line 8340 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8344 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 91: /* mlhs_item: tLPAREN mlhs_inner rparen  */
-#line 3017 "mrbgems/mruby-compiler/core/parse.y"
+#line 3021 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_masgn(p, (yyvsp[-1].nd), NULL);
                     }
-#line 8348 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8352 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 92: /* mlhs_list: mlhs_item ','  */
-#line 3023 "mrbgems/mruby-compiler/core/parse.y"
+#line 3027 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list1((yyvsp[-1].nd));
                     }
-#line 8356 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8360 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 93: /* mlhs_list: mlhs_list mlhs_item ','  */
-#line 3027 "mrbgems/mruby-compiler/core/parse.y"
+#line 3031 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = push((yyvsp[-2].nd), (yyvsp[-1].nd));
                     }
-#line 8364 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8368 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 94: /* mlhs_post: mlhs_item  */
-#line 3033 "mrbgems/mruby-compiler/core/parse.y"
+#line 3037 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list1((yyvsp[0].nd));
                     }
-#line 8372 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8376 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 95: /* mlhs_post: mlhs_list mlhs_item  */
-#line 3037 "mrbgems/mruby-compiler/core/parse.y"
+#line 3041 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = push((yyvsp[-1].nd), (yyvsp[0].nd));
                     }
-#line 8380 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8384 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 96: /* mlhs_node: variable  */
-#line 3043 "mrbgems/mruby-compiler/core/parse.y"
+#line 3047 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       assignable(p, (yyvsp[0].nd));
                     }
-#line 8388 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8392 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 97: /* mlhs_node: primary_value '[' opt_call_args ']'  */
-#line 3047 "mrbgems/mruby-compiler/core/parse.y"
+#line 3051 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_call(p, (yyvsp[-3].nd), intern_op(aref), (yyvsp[-1].nd), '.');
                     }
-#line 8396 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8400 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 98: /* mlhs_node: primary_value call_op "local variable or method"  */
-#line 3051 "mrbgems/mruby-compiler/core/parse.y"
+#line 3055 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_call(p, (yyvsp[-2].nd), (yyvsp[0].id), 0, (yyvsp[-1].num));
                     }
-#line 8404 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8408 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 99: /* mlhs_node: primary_value "::" "local variable or method"  */
-#line 3055 "mrbgems/mruby-compiler/core/parse.y"
+#line 3059 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_call(p, (yyvsp[-2].nd), (yyvsp[0].id), 0, tCOLON2);
                     }
-#line 8412 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8416 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 100: /* mlhs_node: primary_value call_op "constant"  */
-#line 3059 "mrbgems/mruby-compiler/core/parse.y"
+#line 3063 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_call(p, (yyvsp[-2].nd), (yyvsp[0].id), 0, (yyvsp[-1].num));
                     }
-#line 8420 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8424 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 101: /* mlhs_node: primary_value "::" "constant"  */
-#line 3063 "mrbgems/mruby-compiler/core/parse.y"
+#line 3067 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       if (p->in_def || p->in_single)
                         yyerror(&(yylsp[-2]), p, "dynamic constant assignment");
                       (yyval.nd) = new_colon2(p, (yyvsp[-2].nd), (yyvsp[0].id));
                     }
-#line 8430 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8434 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 102: /* mlhs_node: tCOLON3 "constant"  */
-#line 3069 "mrbgems/mruby-compiler/core/parse.y"
+#line 3073 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       if (p->in_def || p->in_single)
                         yyerror(&(yylsp[-1]), p, "dynamic constant assignment");
                       (yyval.nd) = new_colon3(p, (yyvsp[0].id));
                     }
-#line 8440 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8444 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 103: /* mlhs_node: backref  */
-#line 3075 "mrbgems/mruby-compiler/core/parse.y"
+#line 3079 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       backref_error(p, (yyvsp[0].nd));
                       (yyval.nd) = 0;
                     }
-#line 8449 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8453 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 104: /* lhs: variable  */
-#line 3082 "mrbgems/mruby-compiler/core/parse.y"
+#line 3086 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       assignable(p, (yyvsp[0].nd));
                     }
-#line 8457 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8461 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 105: /* lhs: primary_value '[' opt_call_args ']'  */
-#line 3086 "mrbgems/mruby-compiler/core/parse.y"
+#line 3090 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_call(p, (yyvsp[-3].nd), intern_op(aref), (yyvsp[-1].nd), '.');
                     }
-#line 8465 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8469 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 106: /* lhs: primary_value call_op "local variable or method"  */
-#line 3090 "mrbgems/mruby-compiler/core/parse.y"
+#line 3094 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_call(p, (yyvsp[-2].nd), (yyvsp[0].id), 0, (yyvsp[-1].num));
                     }
-#line 8473 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8477 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 107: /* lhs: primary_value "::" "local variable or method"  */
-#line 3094 "mrbgems/mruby-compiler/core/parse.y"
+#line 3098 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_call(p, (yyvsp[-2].nd), (yyvsp[0].id), 0, tCOLON2);
                     }
-#line 8481 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8485 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 108: /* lhs: primary_value call_op "constant"  */
-#line 3098 "mrbgems/mruby-compiler/core/parse.y"
+#line 3102 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_call(p, (yyvsp[-2].nd), (yyvsp[0].id), 0, (yyvsp[-1].num));
                     }
-#line 8489 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8493 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 109: /* lhs: primary_value "::" "constant"  */
-#line 3102 "mrbgems/mruby-compiler/core/parse.y"
+#line 3106 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       if (p->in_def || p->in_single)
                         yyerror(&(yylsp[-2]), p, "dynamic constant assignment");
                       (yyval.nd) = new_colon2(p, (yyvsp[-2].nd), (yyvsp[0].id));
                     }
-#line 8499 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8503 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 110: /* lhs: tCOLON3 "constant"  */
-#line 3108 "mrbgems/mruby-compiler/core/parse.y"
+#line 3112 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       if (p->in_def || p->in_single)
                         yyerror(&(yylsp[-1]), p, "dynamic constant assignment");
                       (yyval.nd) = new_colon3(p, (yyvsp[0].id));
                     }
-#line 8509 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8513 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 111: /* lhs: backref  */
-#line 3114 "mrbgems/mruby-compiler/core/parse.y"
+#line 3118 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       backref_error(p, (yyvsp[0].nd));
                       (yyval.nd) = 0;
                     }
-#line 8518 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8522 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 112: /* lhs: "numbered parameter"  */
-#line 3119 "mrbgems/mruby-compiler/core/parse.y"
+#line 3123 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       yyerror(&(yylsp[0]), p, "can't assign to numbered parameter");
                     }
-#line 8526 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8530 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 113: /* cname: "local variable or method"  */
-#line 3125 "mrbgems/mruby-compiler/core/parse.y"
+#line 3129 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       yyerror(&(yylsp[0]), p, "class/module name must be CONSTANT");
                     }
-#line 8534 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8538 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 115: /* cpath: tCOLON3 cname  */
-#line 3132 "mrbgems/mruby-compiler/core/parse.y"
+#line 3136 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = cons(int_to_node(1), sym_to_node((yyvsp[0].id)));
                     }
-#line 8542 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8546 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 116: /* cpath: cname  */
-#line 3136 "mrbgems/mruby-compiler/core/parse.y"
+#line 3140 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = cons(int_to_node(0), sym_to_node((yyvsp[0].id)));
                     }
-#line 8550 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8554 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 117: /* cpath: primary_value "::" cname  */
-#line 3140 "mrbgems/mruby-compiler/core/parse.y"
+#line 3144 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       void_expr_error(p, (yyvsp[-2].nd));
                       (yyval.nd) = cons((yyvsp[-2].nd), sym_to_node((yyvsp[0].id)));
                     }
-#line 8559 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8563 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 121: /* fname: op  */
-#line 3150 "mrbgems/mruby-compiler/core/parse.y"
+#line 3154 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       p->lstate = EXPR_ENDFN;
                       (yyval.id) = (yyvsp[0].id);
                     }
-#line 8568 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8572 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 122: /* fname: reswords  */
-#line 3155 "mrbgems/mruby-compiler/core/parse.y"
+#line 3159 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       p->lstate = EXPR_ENDFN;
                       (yyval.id) = (yyvsp[0].id);
                     }
-#line 8577 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8581 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 125: /* undef_list: fsym  */
-#line 3166 "mrbgems/mruby-compiler/core/parse.y"
+#line 3170 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = cons(sym_to_node((yyvsp[0].id)), 0);
                     }
-#line 8585 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8589 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 126: /* $@6: %empty  */
-#line 3169 "mrbgems/mruby-compiler/core/parse.y"
+#line 3173 "mrbgems/mruby-compiler/core/parse.y"
                                  {p->lstate = EXPR_FNAME;}
-#line 8591 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8595 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 127: /* undef_list: undef_list ',' $@6 fsym  */
-#line 3170 "mrbgems/mruby-compiler/core/parse.y"
+#line 3174 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = push((yyvsp[-3].nd), sym_to_node((yyvsp[0].id)));
                     }
-#line 8599 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8603 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 128: /* op: '|'  */
-#line 3175 "mrbgems/mruby-compiler/core/parse.y"
+#line 3179 "mrbgems/mruby-compiler/core/parse.y"
                                 { (yyval.id) = intern_op(or);     }
-#line 8605 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8609 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 129: /* op: '^'  */
-#line 3176 "mrbgems/mruby-compiler/core/parse.y"
+#line 3180 "mrbgems/mruby-compiler/core/parse.y"
                                 { (yyval.id) = intern_op(xor);    }
-#line 8611 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8615 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 130: /* op: '&'  */
-#line 3177 "mrbgems/mruby-compiler/core/parse.y"
+#line 3181 "mrbgems/mruby-compiler/core/parse.y"
                                 { (yyval.id) = intern_op(and);    }
-#line 8617 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8621 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 131: /* op: "<=>"  */
-#line 3178 "mrbgems/mruby-compiler/core/parse.y"
+#line 3182 "mrbgems/mruby-compiler/core/parse.y"
                                 { (yyval.id) = intern_op(cmp);    }
-#line 8623 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8627 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 132: /* op: "=="  */
-#line 3179 "mrbgems/mruby-compiler/core/parse.y"
+#line 3183 "mrbgems/mruby-compiler/core/parse.y"
                                 { (yyval.id) = intern_op(eq);     }
-#line 8629 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8633 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 133: /* op: "==="  */
-#line 3180 "mrbgems/mruby-compiler/core/parse.y"
+#line 3184 "mrbgems/mruby-compiler/core/parse.y"
                                 { (yyval.id) = intern_op(eqq);    }
-#line 8635 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8639 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 134: /* op: "=~"  */
-#line 3181 "mrbgems/mruby-compiler/core/parse.y"
+#line 3185 "mrbgems/mruby-compiler/core/parse.y"
                                 { (yyval.id) = intern_op(match);  }
-#line 8641 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8645 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 135: /* op: "!~"  */
-#line 3182 "mrbgems/mruby-compiler/core/parse.y"
+#line 3186 "mrbgems/mruby-compiler/core/parse.y"
                                 { (yyval.id) = intern_op(nmatch); }
-#line 8647 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8651 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 136: /* op: '>'  */
-#line 3183 "mrbgems/mruby-compiler/core/parse.y"
+#line 3187 "mrbgems/mruby-compiler/core/parse.y"
                                 { (yyval.id) = intern_op(gt);     }
-#line 8653 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8657 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 137: /* op: ">="  */
-#line 3184 "mrbgems/mruby-compiler/core/parse.y"
+#line 3188 "mrbgems/mruby-compiler/core/parse.y"
                                 { (yyval.id) = intern_op(ge);     }
-#line 8659 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8663 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 138: /* op: '<'  */
-#line 3185 "mrbgems/mruby-compiler/core/parse.y"
+#line 3189 "mrbgems/mruby-compiler/core/parse.y"
                                 { (yyval.id) = intern_op(lt);     }
-#line 8665 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8669 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 139: /* op: "<="  */
-#line 3186 "mrbgems/mruby-compiler/core/parse.y"
+#line 3190 "mrbgems/mruby-compiler/core/parse.y"
                                 { (yyval.id) = intern_op(le);     }
-#line 8671 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8675 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 140: /* op: "!="  */
-#line 3187 "mrbgems/mruby-compiler/core/parse.y"
+#line 3191 "mrbgems/mruby-compiler/core/parse.y"
                                 { (yyval.id) = intern_op(neq);    }
-#line 8677 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8681 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 141: /* op: "<<"  */
-#line 3188 "mrbgems/mruby-compiler/core/parse.y"
+#line 3192 "mrbgems/mruby-compiler/core/parse.y"
                                 { (yyval.id) = intern_op(lshift); }
-#line 8683 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8687 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 142: /* op: ">>"  */
-#line 3189 "mrbgems/mruby-compiler/core/parse.y"
+#line 3193 "mrbgems/mruby-compiler/core/parse.y"
                                 { (yyval.id) = intern_op(rshift); }
-#line 8689 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8693 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 143: /* op: '+'  */
-#line 3190 "mrbgems/mruby-compiler/core/parse.y"
+#line 3194 "mrbgems/mruby-compiler/core/parse.y"
                                 { (yyval.id) = intern_op(add);    }
-#line 8695 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8699 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 144: /* op: '-'  */
-#line 3191 "mrbgems/mruby-compiler/core/parse.y"
+#line 3195 "mrbgems/mruby-compiler/core/parse.y"
                                 { (yyval.id) = intern_op(sub);    }
-#line 8701 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8705 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 145: /* op: '*'  */
-#line 3192 "mrbgems/mruby-compiler/core/parse.y"
+#line 3196 "mrbgems/mruby-compiler/core/parse.y"
                                 { (yyval.id) = intern_op(mul);    }
-#line 8707 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8711 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 146: /* op: "*"  */
-#line 3193 "mrbgems/mruby-compiler/core/parse.y"
+#line 3197 "mrbgems/mruby-compiler/core/parse.y"
                                 { (yyval.id) = intern_op(mul);    }
-#line 8713 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8717 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 147: /* op: '/'  */
-#line 3194 "mrbgems/mruby-compiler/core/parse.y"
+#line 3198 "mrbgems/mruby-compiler/core/parse.y"
                                 { (yyval.id) = intern_op(div);    }
-#line 8719 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8723 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 148: /* op: '%'  */
-#line 3195 "mrbgems/mruby-compiler/core/parse.y"
+#line 3199 "mrbgems/mruby-compiler/core/parse.y"
                                 { (yyval.id) = intern_op(mod);    }
-#line 8725 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8729 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 149: /* op: tPOW  */
-#line 3196 "mrbgems/mruby-compiler/core/parse.y"
+#line 3200 "mrbgems/mruby-compiler/core/parse.y"
                                 { (yyval.id) = intern_op(pow);    }
-#line 8731 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8735 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 150: /* op: "**"  */
-#line 3197 "mrbgems/mruby-compiler/core/parse.y"
+#line 3201 "mrbgems/mruby-compiler/core/parse.y"
                                 { (yyval.id) = intern_op(pow);    }
-#line 8737 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8741 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 151: /* op: '!'  */
-#line 3198 "mrbgems/mruby-compiler/core/parse.y"
+#line 3202 "mrbgems/mruby-compiler/core/parse.y"
                                 { (yyval.id) = intern_op(not);    }
-#line 8743 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8747 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 152: /* op: '~'  */
-#line 3199 "mrbgems/mruby-compiler/core/parse.y"
+#line 3203 "mrbgems/mruby-compiler/core/parse.y"
                                 { (yyval.id) = intern_op(neg);    }
-#line 8749 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8753 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 153: /* op: "unary plus"  */
-#line 3200 "mrbgems/mruby-compiler/core/parse.y"
+#line 3204 "mrbgems/mruby-compiler/core/parse.y"
                                 { (yyval.id) = intern_op(plus);   }
-#line 8755 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8759 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 154: /* op: "unary minus"  */
-#line 3201 "mrbgems/mruby-compiler/core/parse.y"
+#line 3205 "mrbgems/mruby-compiler/core/parse.y"
                                 { (yyval.id) = intern_op(minus);  }
-#line 8761 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8765 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 155: /* op: tAREF  */
-#line 3202 "mrbgems/mruby-compiler/core/parse.y"
+#line 3206 "mrbgems/mruby-compiler/core/parse.y"
                                 { (yyval.id) = intern_op(aref);   }
-#line 8767 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8771 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 156: /* op: tASET  */
-#line 3203 "mrbgems/mruby-compiler/core/parse.y"
+#line 3207 "mrbgems/mruby-compiler/core/parse.y"
                                 { (yyval.id) = intern_op(aset);   }
-#line 8773 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8777 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 157: /* op: '`'  */
-#line 3204 "mrbgems/mruby-compiler/core/parse.y"
+#line 3208 "mrbgems/mruby-compiler/core/parse.y"
                                 { (yyval.id) = intern_op(tick);   }
-#line 8779 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8783 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 198: /* arg: lhs '=' arg_rhs  */
-#line 3222 "mrbgems/mruby-compiler/core/parse.y"
+#line 3226 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_asgn(p, (yyvsp[-2].nd), (yyvsp[0].nd));
                     }
-#line 8787 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8791 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 199: /* arg: var_lhs tOP_ASGN arg_rhs  */
-#line 3226 "mrbgems/mruby-compiler/core/parse.y"
+#line 3230 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_op_asgn(p, (yyvsp[-2].nd), (yyvsp[-1].id), (yyvsp[0].nd));
                     }
-#line 8795 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8799 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 200: /* arg: primary_value '[' opt_call_args ']' tOP_ASGN arg_rhs  */
-#line 3230 "mrbgems/mruby-compiler/core/parse.y"
+#line 3234 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_op_asgn(p, new_call(p, (yyvsp[-5].nd), intern_op(aref), (yyvsp[-3].nd), '.'), (yyvsp[-1].id), (yyvsp[0].nd));
                     }
-#line 8803 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8807 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 201: /* arg: primary_value call_op "local variable or method" tOP_ASGN arg_rhs  */
-#line 3234 "mrbgems/mruby-compiler/core/parse.y"
-                    {
-                      (yyval.nd) = new_op_asgn(p, new_call(p, (yyvsp[-4].nd), (yyvsp[-2].id), 0, (yyvsp[-3].num)), (yyvsp[-1].id), (yyvsp[0].nd));
-                    }
-#line 8811 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 202: /* arg: primary_value call_op "constant" tOP_ASGN arg_rhs  */
 #line 3238 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_op_asgn(p, new_call(p, (yyvsp[-4].nd), (yyvsp[-2].id), 0, (yyvsp[-3].num)), (yyvsp[-1].id), (yyvsp[0].nd));
                     }
-#line 8819 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8815 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 202: /* arg: primary_value call_op "constant" tOP_ASGN arg_rhs  */
+#line 3242 "mrbgems/mruby-compiler/core/parse.y"
+                    {
+                      (yyval.nd) = new_op_asgn(p, new_call(p, (yyvsp[-4].nd), (yyvsp[-2].id), 0, (yyvsp[-3].num)), (yyvsp[-1].id), (yyvsp[0].nd));
+                    }
+#line 8823 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 203: /* arg: primary_value "::" "local variable or method" tOP_ASGN arg_rhs  */
-#line 3242 "mrbgems/mruby-compiler/core/parse.y"
+#line 3246 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_op_asgn(p, new_call(p, (yyvsp[-4].nd), (yyvsp[-2].id), 0, tCOLON2), (yyvsp[-1].id), (yyvsp[0].nd));
                     }
-#line 8827 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8831 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 204: /* arg: primary_value "::" "constant" tOP_ASGN arg_rhs  */
-#line 3246 "mrbgems/mruby-compiler/core/parse.y"
+#line 3250 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       yyerror(&(yylsp[-4]), p, "constant re-assignment");
                       (yyval.nd) = new_stmts(p, 0);
                     }
-#line 8836 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8840 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 205: /* arg: tCOLON3 "constant" tOP_ASGN arg_rhs  */
-#line 3251 "mrbgems/mruby-compiler/core/parse.y"
+#line 3255 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       yyerror(&(yylsp[-3]), p, "constant re-assignment");
                       (yyval.nd) = new_stmts(p, 0);
                     }
-#line 8845 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8849 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 206: /* arg: backref tOP_ASGN arg_rhs  */
-#line 3256 "mrbgems/mruby-compiler/core/parse.y"
+#line 3260 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       backref_error(p, (yyvsp[-2].nd));
                       (yyval.nd) = new_stmts(p, 0);
                     }
-#line 8854 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8858 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 207: /* arg: arg ".." arg  */
-#line 3261 "mrbgems/mruby-compiler/core/parse.y"
+#line 3265 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_dot2(p, (yyvsp[-2].nd), (yyvsp[0].nd));
                     }
-#line 8862 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8866 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 208: /* arg: arg ".."  */
-#line 3265 "mrbgems/mruby-compiler/core/parse.y"
+#line 3269 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_dot2(p, (yyvsp[-1].nd), new_nil(p));
                     }
-#line 8870 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8874 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 209: /* arg: tBDOT2 arg  */
-#line 3269 "mrbgems/mruby-compiler/core/parse.y"
+#line 3273 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_dot2(p, new_nil(p), (yyvsp[0].nd));
                     }
-#line 8878 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8882 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 210: /* arg: arg "..." arg  */
-#line 3273 "mrbgems/mruby-compiler/core/parse.y"
+#line 3277 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_dot3(p, (yyvsp[-2].nd), (yyvsp[0].nd));
                     }
-#line 8886 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8890 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 211: /* arg: arg "..."  */
-#line 3277 "mrbgems/mruby-compiler/core/parse.y"
+#line 3281 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_dot3(p, (yyvsp[-1].nd), new_nil(p));
                     }
-#line 8894 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8898 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 212: /* arg: tBDOT3 arg  */
-#line 3281 "mrbgems/mruby-compiler/core/parse.y"
+#line 3285 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_dot3(p, new_nil(p), (yyvsp[0].nd));
                     }
-#line 8902 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8906 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 213: /* arg: arg '+' arg  */
-#line 3285 "mrbgems/mruby-compiler/core/parse.y"
+#line 3289 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = call_bin_op(p, (yyvsp[-2].nd), "+", (yyvsp[0].nd));
                     }
-#line 8910 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8914 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 214: /* arg: arg '-' arg  */
-#line 3289 "mrbgems/mruby-compiler/core/parse.y"
+#line 3293 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = call_bin_op(p, (yyvsp[-2].nd), "-", (yyvsp[0].nd));
                     }
-#line 8918 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8922 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 215: /* arg: arg '*' arg  */
-#line 3293 "mrbgems/mruby-compiler/core/parse.y"
+#line 3297 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = call_bin_op(p, (yyvsp[-2].nd), "*", (yyvsp[0].nd));
                     }
-#line 8926 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8930 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 216: /* arg: arg '/' arg  */
-#line 3297 "mrbgems/mruby-compiler/core/parse.y"
+#line 3301 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = call_bin_op(p, (yyvsp[-2].nd), "/", (yyvsp[0].nd));
                     }
-#line 8934 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8938 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 217: /* arg: arg '%' arg  */
-#line 3301 "mrbgems/mruby-compiler/core/parse.y"
+#line 3305 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = call_bin_op(p, (yyvsp[-2].nd), "%", (yyvsp[0].nd));
                     }
-#line 8942 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8946 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 218: /* arg: arg tPOW arg  */
-#line 3305 "mrbgems/mruby-compiler/core/parse.y"
+#line 3309 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = call_bin_op(p, (yyvsp[-2].nd), "**", (yyvsp[0].nd));
                     }
-#line 8950 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8954 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 219: /* arg: tUMINUS_NUM "integer literal" tPOW arg  */
-#line 3309 "mrbgems/mruby-compiler/core/parse.y"
-                    {
-                      (yyval.nd) = new_negate(p, call_bin_op(p, (yyvsp[-2].nd), "**", (yyvsp[0].nd)));
-                    }
-#line 8958 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 220: /* arg: tUMINUS_NUM "float literal" tPOW arg  */
 #line 3313 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_negate(p, call_bin_op(p, (yyvsp[-2].nd), "**", (yyvsp[0].nd)));
                     }
-#line 8966 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8962 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 220: /* arg: tUMINUS_NUM "float literal" tPOW arg  */
+#line 3317 "mrbgems/mruby-compiler/core/parse.y"
+                    {
+                      (yyval.nd) = new_negate(p, call_bin_op(p, (yyvsp[-2].nd), "**", (yyvsp[0].nd)));
+                    }
+#line 8970 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 221: /* arg: "unary plus" arg  */
-#line 3317 "mrbgems/mruby-compiler/core/parse.y"
+#line 3321 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = call_uni_op(p, (yyvsp[0].nd), "+@");
                     }
-#line 8974 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8978 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 222: /* arg: "unary minus" arg  */
-#line 3321 "mrbgems/mruby-compiler/core/parse.y"
+#line 3325 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_negate(p, (yyvsp[0].nd));
                     }
-#line 8982 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8986 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 223: /* arg: arg '|' arg  */
-#line 3325 "mrbgems/mruby-compiler/core/parse.y"
+#line 3329 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = call_bin_op(p, (yyvsp[-2].nd), "|", (yyvsp[0].nd));
                     }
-#line 8990 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8994 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 224: /* arg: arg '^' arg  */
-#line 3329 "mrbgems/mruby-compiler/core/parse.y"
+#line 3333 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = call_bin_op(p, (yyvsp[-2].nd), "^", (yyvsp[0].nd));
                     }
-#line 8998 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9002 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 225: /* arg: arg '&' arg  */
-#line 3333 "mrbgems/mruby-compiler/core/parse.y"
+#line 3337 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = call_bin_op(p, (yyvsp[-2].nd), "&", (yyvsp[0].nd));
                     }
-#line 9006 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9010 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 226: /* arg: arg "<=>" arg  */
-#line 3337 "mrbgems/mruby-compiler/core/parse.y"
+#line 3341 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = call_bin_op(p, (yyvsp[-2].nd), "<=>", (yyvsp[0].nd));
                     }
-#line 9014 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9018 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 227: /* arg: arg '>' arg  */
-#line 3341 "mrbgems/mruby-compiler/core/parse.y"
+#line 3345 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = call_bin_op(p, (yyvsp[-2].nd), ">", (yyvsp[0].nd));
                     }
-#line 9022 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9026 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 228: /* arg: arg ">=" arg  */
-#line 3345 "mrbgems/mruby-compiler/core/parse.y"
+#line 3349 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = call_bin_op(p, (yyvsp[-2].nd), ">=", (yyvsp[0].nd));
                     }
-#line 9030 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9034 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 229: /* arg: arg '<' arg  */
-#line 3349 "mrbgems/mruby-compiler/core/parse.y"
+#line 3353 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = call_bin_op(p, (yyvsp[-2].nd), "<", (yyvsp[0].nd));
                     }
-#line 9038 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9042 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 230: /* arg: arg "<=" arg  */
-#line 3353 "mrbgems/mruby-compiler/core/parse.y"
+#line 3357 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = call_bin_op(p, (yyvsp[-2].nd), "<=", (yyvsp[0].nd));
                     }
-#line 9046 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9050 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 231: /* arg: arg "==" arg  */
-#line 3357 "mrbgems/mruby-compiler/core/parse.y"
+#line 3361 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = call_bin_op(p, (yyvsp[-2].nd), "==", (yyvsp[0].nd));
                     }
-#line 9054 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9058 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 232: /* arg: arg "===" arg  */
-#line 3361 "mrbgems/mruby-compiler/core/parse.y"
+#line 3365 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = call_bin_op(p, (yyvsp[-2].nd), "===", (yyvsp[0].nd));
                     }
-#line 9062 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9066 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 233: /* arg: arg "!=" arg  */
-#line 3365 "mrbgems/mruby-compiler/core/parse.y"
+#line 3369 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = call_bin_op(p, (yyvsp[-2].nd), "!=", (yyvsp[0].nd));
                     }
-#line 9070 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9074 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 234: /* arg: arg "=~" arg  */
-#line 3369 "mrbgems/mruby-compiler/core/parse.y"
+#line 3373 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = call_bin_op(p, (yyvsp[-2].nd), "=~", (yyvsp[0].nd));
                     }
-#line 9078 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9082 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 235: /* arg: arg "!~" arg  */
-#line 3373 "mrbgems/mruby-compiler/core/parse.y"
+#line 3377 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = call_bin_op(p, (yyvsp[-2].nd), "!~", (yyvsp[0].nd));
                     }
-#line 9086 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9090 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 236: /* arg: '!' arg  */
-#line 3377 "mrbgems/mruby-compiler/core/parse.y"
+#line 3381 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = call_uni_op(p, cond((yyvsp[0].nd)), "!");
                     }
-#line 9094 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9098 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 237: /* arg: '~' arg  */
-#line 3381 "mrbgems/mruby-compiler/core/parse.y"
+#line 3385 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = call_uni_op(p, cond((yyvsp[0].nd)), "~");
                     }
-#line 9102 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9106 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 238: /* arg: arg "<<" arg  */
-#line 3385 "mrbgems/mruby-compiler/core/parse.y"
+#line 3389 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = call_bin_op(p, (yyvsp[-2].nd), "<<", (yyvsp[0].nd));
                     }
-#line 9110 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9114 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 239: /* arg: arg ">>" arg  */
-#line 3389 "mrbgems/mruby-compiler/core/parse.y"
+#line 3393 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = call_bin_op(p, (yyvsp[-2].nd), ">>", (yyvsp[0].nd));
                     }
-#line 9118 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9122 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 240: /* arg: arg "&&" arg  */
-#line 3393 "mrbgems/mruby-compiler/core/parse.y"
+#line 3397 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_and(p, (yyvsp[-2].nd), (yyvsp[0].nd));
                     }
-#line 9126 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9130 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 241: /* arg: arg "||" arg  */
-#line 3397 "mrbgems/mruby-compiler/core/parse.y"
+#line 3401 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_or(p, (yyvsp[-2].nd), (yyvsp[0].nd));
                     }
-#line 9134 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9138 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 242: /* arg: arg '?' arg opt_nl ':' arg  */
-#line 3401 "mrbgems/mruby-compiler/core/parse.y"
-                    {
-                      (yyval.nd) = new_if(p, cond((yyvsp[-5].nd)), (yyvsp[-3].nd), (yyvsp[0].nd));
-                    }
-#line 9142 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 243: /* arg: arg '?' arg opt_nl "label" arg  */
 #line 3405 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_if(p, cond((yyvsp[-5].nd)), (yyvsp[-3].nd), (yyvsp[0].nd));
                     }
-#line 9150 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9146 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 243: /* arg: arg '?' arg opt_nl "label" arg  */
+#line 3409 "mrbgems/mruby-compiler/core/parse.y"
+                    {
+                      (yyval.nd) = new_if(p, cond((yyvsp[-5].nd)), (yyvsp[-3].nd), (yyvsp[0].nd));
+                    }
+#line 9154 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 244: /* arg: defn_head f_opt_arglist_paren '=' arg  */
-#line 3409 "mrbgems/mruby-compiler/core/parse.y"
+#line 3413 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[-3].nd);
                       endless_method_name(p, (yyvsp[-3].nd));
@@ -9159,11 +9163,11 @@ yyreduce:
                       nvars_unnest(p);
                       p->in_def--;
                     }
-#line 9163 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9167 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 245: /* arg: defn_head f_opt_arglist_paren '=' arg "'rescue' modifier" arg  */
-#line 3418 "mrbgems/mruby-compiler/core/parse.y"
+#line 3422 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[-5].nd);
                       endless_method_name(p, (yyvsp[-5].nd));
@@ -9172,11 +9176,11 @@ yyreduce:
                       nvars_unnest(p);
                       p->in_def--;
                     }
-#line 9176 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9180 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 246: /* arg: defs_head f_opt_arglist_paren '=' arg  */
-#line 3427 "mrbgems/mruby-compiler/core/parse.y"
+#line 3431 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[-3].nd);
                       void_expr_error(p, (yyvsp[0].nd));
@@ -9185,11 +9189,11 @@ yyreduce:
                       p->in_def--;
                       p->in_single--;
                     }
-#line 9189 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9193 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 247: /* arg: defs_head f_opt_arglist_paren '=' arg "'rescue' modifier" arg  */
-#line 3436 "mrbgems/mruby-compiler/core/parse.y"
+#line 3440 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[-5].nd);
                       void_expr_error(p, (yyvsp[-2].nd));
@@ -9198,68 +9202,68 @@ yyreduce:
                       p->in_def--;
                       p->in_single--;
                     }
-#line 9202 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9206 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 248: /* arg: primary  */
-#line 3445 "mrbgems/mruby-compiler/core/parse.y"
+#line 3449 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[0].nd);
                     }
-#line 9210 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9214 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 250: /* aref_args: args trailer  */
-#line 3452 "mrbgems/mruby-compiler/core/parse.y"
+#line 3456 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[-1].nd);
                     }
-#line 9218 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9222 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 251: /* aref_args: args comma assocs trailer  */
-#line 3456 "mrbgems/mruby-compiler/core/parse.y"
+#line 3460 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = push((yyvsp[-3].nd), new_hash(p, (yyvsp[-1].nd)));
                     }
-#line 9226 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9230 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 252: /* aref_args: assocs trailer  */
-#line 3460 "mrbgems/mruby-compiler/core/parse.y"
+#line 3464 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = cons(new_kw_hash(p, (yyvsp[-1].nd)), 0);
                     }
-#line 9234 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9238 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 253: /* arg_rhs: arg  */
-#line 3466 "mrbgems/mruby-compiler/core/parse.y"
+#line 3470 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[0].nd);
                     }
-#line 9242 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9246 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 254: /* arg_rhs: arg "'rescue' modifier" arg  */
-#line 3470 "mrbgems/mruby-compiler/core/parse.y"
+#line 3474 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       void_expr_error(p, (yyvsp[-2].nd));
                       (yyval.nd) = new_mod_rescue(p, (yyvsp[-2].nd), (yyvsp[0].nd));
                     }
-#line 9251 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9255 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 255: /* paren_args: '(' opt_call_args ')'  */
-#line 3477 "mrbgems/mruby-compiler/core/parse.y"
+#line 3481 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[-1].nd);
                     }
-#line 9259 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9263 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 256: /* paren_args: '(' args comma tBDOT3 rparen  */
-#line 3481 "mrbgems/mruby-compiler/core/parse.y"
+#line 3485 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       mrb_sym r = intern_op(mul);
                       mrb_sym k = intern_op(pow);
@@ -9268,11 +9272,11 @@ yyreduce:
                                         new_kw_hash(p, list1(cons(new_kw_rest_args(p, 0), new_lvar(p, k)))),
                                         new_block_arg(p, new_lvar(p, b)));
                     }
-#line 9272 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9276 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 257: /* paren_args: '(' tBDOT3 rparen  */
-#line 3490 "mrbgems/mruby-compiler/core/parse.y"
+#line 3494 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       mrb_sym r = intern_op(mul);
                       mrb_sym k = intern_op(pow);
@@ -9287,390 +9291,390 @@ yyreduce:
                         (yyval.nd) = 0;
                       }
                     }
-#line 9291 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9295 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 262: /* opt_call_args: args comma  */
-#line 3513 "mrbgems/mruby-compiler/core/parse.y"
+#line 3517 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_callargs(p,(yyvsp[-1].nd),0,0);
                     }
-#line 9299 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9303 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 263: /* opt_call_args: args comma assocs comma  */
-#line 3517 "mrbgems/mruby-compiler/core/parse.y"
+#line 3521 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_callargs(p,(yyvsp[-3].nd),new_kw_hash(p,(yyvsp[-1].nd)),0);
                     }
-#line 9307 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9311 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 264: /* opt_call_args: assocs comma  */
-#line 3521 "mrbgems/mruby-compiler/core/parse.y"
+#line 3525 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_callargs(p,0,new_kw_hash(p,(yyvsp[-1].nd)),0);
                     }
-#line 9315 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9319 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 265: /* call_args: command  */
-#line 3527 "mrbgems/mruby-compiler/core/parse.y"
+#line 3531 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       void_expr_error(p, (yyvsp[0].nd));
                       (yyval.nd) = new_callargs(p, list1((yyvsp[0].nd)), 0, 0);
                     }
-#line 9324 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9328 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 266: /* call_args: args opt_block_arg  */
-#line 3532 "mrbgems/mruby-compiler/core/parse.y"
+#line 3536 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_callargs(p, (yyvsp[-1].nd), 0, (yyvsp[0].nd));
                     }
-#line 9332 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9336 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 267: /* call_args: assocs opt_block_arg  */
-#line 3536 "mrbgems/mruby-compiler/core/parse.y"
+#line 3540 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_callargs(p, 0, new_kw_hash(p, (yyvsp[-1].nd)), (yyvsp[0].nd));
                     }
-#line 9340 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9344 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 268: /* call_args: args comma assocs opt_block_arg  */
-#line 3540 "mrbgems/mruby-compiler/core/parse.y"
+#line 3544 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_callargs(p, (yyvsp[-3].nd), new_kw_hash(p, (yyvsp[-1].nd)), (yyvsp[0].nd));
                     }
-#line 9348 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9352 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 269: /* call_args: block_arg  */
-#line 3544 "mrbgems/mruby-compiler/core/parse.y"
+#line 3548 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_callargs(p, 0, 0, (yyvsp[0].nd));
                     }
-#line 9356 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9360 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 270: /* @7: %empty  */
-#line 3549 "mrbgems/mruby-compiler/core/parse.y"
+#line 3553 "mrbgems/mruby-compiler/core/parse.y"
                    {
                       (yyval.stack) = p->cmdarg_stack;
                       CMDARG_PUSH(1);
                     }
-#line 9365 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9369 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 271: /* command_args: @7 call_args  */
-#line 3554 "mrbgems/mruby-compiler/core/parse.y"
+#line 3558 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       p->cmdarg_stack = (yyvsp[-1].stack);
                       (yyval.nd) = (yyvsp[0].nd);
                     }
-#line 9374 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9378 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 272: /* block_arg: "&" arg  */
-#line 3561 "mrbgems/mruby-compiler/core/parse.y"
+#line 3565 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_block_arg(p, (yyvsp[0].nd));
                     }
-#line 9382 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9386 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 273: /* block_arg: "&"  */
-#line 3565 "mrbgems/mruby-compiler/core/parse.y"
+#line 3569 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_block_arg(p, 0);
                     }
-#line 9390 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9394 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 274: /* opt_block_arg: comma block_arg  */
-#line 3571 "mrbgems/mruby-compiler/core/parse.y"
+#line 3575 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[0].nd);
                     }
-#line 9398 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9402 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 275: /* opt_block_arg: none  */
-#line 3575 "mrbgems/mruby-compiler/core/parse.y"
+#line 3579 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = 0;
                     }
-#line 9406 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9410 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 277: /* args: arg  */
-#line 3584 "mrbgems/mruby-compiler/core/parse.y"
+#line 3588 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       void_expr_error(p, (yyvsp[0].nd));
                       (yyval.nd) = list1((yyvsp[0].nd));
                     }
-#line 9415 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9419 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 278: /* args: "*"  */
-#line 3589 "mrbgems/mruby-compiler/core/parse.y"
+#line 3593 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list1(new_splat(p, new_lvar(p, intern_op(mul))));
                     }
-#line 9423 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9427 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 279: /* args: "*" arg  */
-#line 3593 "mrbgems/mruby-compiler/core/parse.y"
+#line 3597 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list1(new_splat(p, (yyvsp[0].nd)));
                     }
-#line 9431 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9435 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 280: /* args: args comma arg  */
-#line 3597 "mrbgems/mruby-compiler/core/parse.y"
+#line 3601 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       void_expr_error(p, (yyvsp[0].nd));
                       (yyval.nd) = push((yyvsp[-2].nd), (yyvsp[0].nd));
                     }
-#line 9440 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9444 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 281: /* args: args comma "*"  */
-#line 3602 "mrbgems/mruby-compiler/core/parse.y"
+#line 3606 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = push((yyvsp[-2].nd), new_splat(p, new_lvar(p, intern_op(mul))));
                     }
-#line 9448 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9452 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 282: /* args: args comma "*" arg  */
-#line 3606 "mrbgems/mruby-compiler/core/parse.y"
+#line 3610 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = push((yyvsp[-3].nd), new_splat(p, (yyvsp[0].nd)));
                     }
-#line 9456 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9460 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 283: /* mrhs: args comma arg  */
-#line 3612 "mrbgems/mruby-compiler/core/parse.y"
+#line 3616 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       void_expr_error(p, (yyvsp[0].nd));
                       (yyval.nd) = push((yyvsp[-2].nd), (yyvsp[0].nd));
                     }
-#line 9465 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9469 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 284: /* mrhs: args comma "*" arg  */
-#line 3617 "mrbgems/mruby-compiler/core/parse.y"
+#line 3621 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = push((yyvsp[-3].nd), new_splat(p, (yyvsp[0].nd)));
                     }
-#line 9473 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9477 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 285: /* mrhs: "*" arg  */
-#line 3621 "mrbgems/mruby-compiler/core/parse.y"
+#line 3625 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list1(new_splat(p, (yyvsp[0].nd)));
                     }
-#line 9481 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9485 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 287: /* primary: string  */
-#line 3628 "mrbgems/mruby-compiler/core/parse.y"
+#line 3632 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_str(p, (yyvsp[0].nd));
                     }
-#line 9489 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9493 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 288: /* primary: xstring  */
-#line 3632 "mrbgems/mruby-compiler/core/parse.y"
+#line 3636 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_xstr(p, (yyvsp[0].nd));
                     }
-#line 9497 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9501 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 293: /* primary: "method"  */
-#line 3640 "mrbgems/mruby-compiler/core/parse.y"
+#line 3644 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_fcall(p, (yyvsp[0].id), 0);
                     }
-#line 9505 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9509 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 294: /* @8: %empty  */
-#line 3644 "mrbgems/mruby-compiler/core/parse.y"
+#line 3648 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.stack) = p->cmdarg_stack;
                       p->cmdarg_stack = 0;
                     }
-#line 9514 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9518 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 295: /* primary: "'begin'" @8 bodystmt "'end'"  */
-#line 3650 "mrbgems/mruby-compiler/core/parse.y"
+#line 3654 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       p->cmdarg_stack = (yyvsp[-2].stack);
                       (yyval.nd) = new_begin(p, (yyvsp[-1].nd));
                     }
-#line 9523 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9527 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 296: /* @9: %empty  */
-#line 3655 "mrbgems/mruby-compiler/core/parse.y"
+#line 3659 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.stack) = p->cmdarg_stack;
                       p->cmdarg_stack = 0;
                     }
-#line 9532 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9536 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 297: /* $@10: %empty  */
-#line 3659 "mrbgems/mruby-compiler/core/parse.y"
+#line 3663 "mrbgems/mruby-compiler/core/parse.y"
                        {p->lstate = EXPR_ENDARG;}
-#line 9538 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9542 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 298: /* primary: "(" @9 stmt $@10 rparen  */
-#line 3660 "mrbgems/mruby-compiler/core/parse.y"
+#line 3664 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       p->cmdarg_stack = (yyvsp[-3].stack);
                       (yyval.nd) = (yyvsp[-2].nd);
                     }
-#line 9547 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9551 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 299: /* $@11: %empty  */
-#line 3664 "mrbgems/mruby-compiler/core/parse.y"
+#line 3668 "mrbgems/mruby-compiler/core/parse.y"
                               {p->lstate = EXPR_ENDARG;}
-#line 9553 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9557 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 300: /* primary: "(" $@11 rparen  */
-#line 3665 "mrbgems/mruby-compiler/core/parse.y"
+#line 3669 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_nil(p);
                     }
-#line 9561 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9565 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 301: /* primary: tLPAREN compstmt ')'  */
-#line 3669 "mrbgems/mruby-compiler/core/parse.y"
+#line 3673 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[-1].nd);
                     }
-#line 9569 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9573 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 302: /* primary: primary_value "::" "constant"  */
-#line 3673 "mrbgems/mruby-compiler/core/parse.y"
+#line 3677 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_colon2(p, (yyvsp[-2].nd), (yyvsp[0].id));
                     }
-#line 9577 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9581 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 303: /* primary: tCOLON3 "constant"  */
-#line 3677 "mrbgems/mruby-compiler/core/parse.y"
+#line 3681 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_colon3(p, (yyvsp[0].id));
                     }
-#line 9585 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9589 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 304: /* primary: "[" aref_args ']'  */
-#line 3681 "mrbgems/mruby-compiler/core/parse.y"
+#line 3685 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_array(p, (yyvsp[-1].nd));
                     }
-#line 9593 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9597 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 305: /* primary: tLBRACE assoc_list '}'  */
-#line 3685 "mrbgems/mruby-compiler/core/parse.y"
+#line 3689 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_hash(p, (yyvsp[-1].nd));
                     }
-#line 9601 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9605 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 306: /* primary: "'return'"  */
-#line 3689 "mrbgems/mruby-compiler/core/parse.y"
+#line 3693 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_return(p, 0);
                     }
-#line 9609 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9613 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 307: /* primary: "'yield'" opt_paren_args  */
-#line 3693 "mrbgems/mruby-compiler/core/parse.y"
+#line 3697 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_yield(p, (yyvsp[0].nd));
                     }
-#line 9617 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9621 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 308: /* primary: "'not'" '(' expr rparen  */
-#line 3697 "mrbgems/mruby-compiler/core/parse.y"
+#line 3701 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = call_uni_op(p, cond((yyvsp[-1].nd)), "!");
                     }
-#line 9625 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9629 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 309: /* primary: "'not'" '(' rparen  */
-#line 3701 "mrbgems/mruby-compiler/core/parse.y"
+#line 3705 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = call_uni_op(p, new_nil(p), "!");
                     }
-#line 9633 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9637 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 310: /* primary: operation brace_block  */
-#line 3705 "mrbgems/mruby-compiler/core/parse.y"
+#line 3709 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_fcall(p, (yyvsp[-1].id), new_callargs(p, 0, 0, (yyvsp[0].nd)));
                     }
-#line 9641 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9645 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 312: /* primary: method_call brace_block  */
-#line 3710 "mrbgems/mruby-compiler/core/parse.y"
+#line 3714 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       call_with_block(p, (yyvsp[-1].nd), (yyvsp[0].nd));
                       (yyval.nd) = (yyvsp[-1].nd);
                     }
-#line 9650 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9654 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 313: /* @12: %empty  */
-#line 3715 "mrbgems/mruby-compiler/core/parse.y"
+#line 3719 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       local_nest(p);
                       nvars_nest(p);
                       (yyval.num) = p->lpar_beg;
                       p->lpar_beg = ++p->paren_nest;
                     }
-#line 9661 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9665 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 314: /* @13: %empty  */
-#line 3722 "mrbgems/mruby-compiler/core/parse.y"
+#line 3726 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.stack) = p->cmdarg_stack;
                       p->cmdarg_stack = 0;
                     }
-#line 9670 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9674 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 315: /* primary: "->" @12 f_larglist @13 lambda_body  */
-#line 3727 "mrbgems/mruby-compiler/core/parse.y"
+#line 3731 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       p->lpar_beg = (yyvsp[-3].num);
                       (yyval.nd) = new_lambda(p, (yyvsp[-2].nd), (yyvsp[0].nd));
@@ -9679,149 +9683,149 @@ yyreduce:
                       p->cmdarg_stack = (yyvsp[-1].stack);
                       CMDARG_LEXPOP();
                     }
-#line 9683 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9687 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 316: /* primary: "'if'" expr_value then compstmt if_tail "'end'"  */
-#line 3739 "mrbgems/mruby-compiler/core/parse.y"
+#line 3743 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_if(p, cond((yyvsp[-4].nd)), (yyvsp[-2].nd), (yyvsp[-1].nd));
                       SET_LINENO((yyval.nd), (yyvsp[-5].num));
                     }
-#line 9692 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9696 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 317: /* primary: "'unless'" expr_value then compstmt opt_else "'end'"  */
-#line 3747 "mrbgems/mruby-compiler/core/parse.y"
+#line 3751 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_if(p, cond((yyvsp[-4].nd)), (yyvsp[-1].nd), (yyvsp[-2].nd));
                       SET_LINENO((yyval.nd), (yyvsp[-5].num));
                     }
-#line 9701 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9705 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 318: /* $@14: %empty  */
-#line 3751 "mrbgems/mruby-compiler/core/parse.y"
+#line 3755 "mrbgems/mruby-compiler/core/parse.y"
                                 {COND_PUSH(1);}
-#line 9707 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9711 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 319: /* $@15: %empty  */
-#line 3751 "mrbgems/mruby-compiler/core/parse.y"
+#line 3755 "mrbgems/mruby-compiler/core/parse.y"
                                                               {COND_POP();}
-#line 9713 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9717 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 320: /* primary: "'while'" $@14 expr_value do $@15 compstmt "'end'"  */
-#line 3754 "mrbgems/mruby-compiler/core/parse.y"
+#line 3758 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_while(p, cond((yyvsp[-4].nd)), (yyvsp[-1].nd));
                       SET_LINENO((yyval.nd), (yyvsp[-6].num));
                     }
-#line 9722 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9726 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 321: /* $@16: %empty  */
-#line 3758 "mrbgems/mruby-compiler/core/parse.y"
+#line 3762 "mrbgems/mruby-compiler/core/parse.y"
                                 {COND_PUSH(1);}
-#line 9728 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9732 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 322: /* $@17: %empty  */
-#line 3758 "mrbgems/mruby-compiler/core/parse.y"
+#line 3762 "mrbgems/mruby-compiler/core/parse.y"
                                                               {COND_POP();}
-#line 9734 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9738 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 323: /* primary: "'until'" $@16 expr_value do $@17 compstmt "'end'"  */
-#line 3761 "mrbgems/mruby-compiler/core/parse.y"
+#line 3765 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_until(p, cond((yyvsp[-4].nd)), (yyvsp[-1].nd));
                       SET_LINENO((yyval.nd), (yyvsp[-6].num));
                     }
-#line 9743 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9747 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 324: /* primary: "'case'" expr_value opt_terms case_body "'end'"  */
-#line 3768 "mrbgems/mruby-compiler/core/parse.y"
+#line 3772 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_case(p, (yyvsp[-3].nd), (yyvsp[-1].nd));
                     }
-#line 9751 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9755 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 325: /* primary: "'case'" opt_terms case_body "'end'"  */
-#line 3772 "mrbgems/mruby-compiler/core/parse.y"
+#line 3776 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_case(p, 0, (yyvsp[-1].nd));
                     }
-#line 9759 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9763 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 326: /* $@18: %empty  */
-#line 3776 "mrbgems/mruby-compiler/core/parse.y"
+#line 3780 "mrbgems/mruby-compiler/core/parse.y"
                   {COND_PUSH(1);}
-#line 9765 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9769 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 327: /* $@19: %empty  */
-#line 3778 "mrbgems/mruby-compiler/core/parse.y"
+#line 3782 "mrbgems/mruby-compiler/core/parse.y"
                   {COND_POP();}
-#line 9771 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9775 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 328: /* primary: "'for'" for_var "'in'" $@18 expr_value do $@19 compstmt "'end'"  */
-#line 3781 "mrbgems/mruby-compiler/core/parse.y"
+#line 3785 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_for(p, (yyvsp[-7].nd), (yyvsp[-4].nd), (yyvsp[-1].nd));
                       SET_LINENO((yyval.nd), (yyvsp[-8].num));
                     }
-#line 9780 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9784 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 329: /* @20: %empty  */
-#line 3787 "mrbgems/mruby-compiler/core/parse.y"
+#line 3791 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       if (p->in_def || p->in_single)
                         yyerror(&(yylsp[-2]), p, "class definition in method body");
                       (yyval.nd) = local_switch(p);
                       nvars_block(p);
                     }
-#line 9791 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9795 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 330: /* primary: "'class'" cpath superclass @20 bodystmt "'end'"  */
-#line 3795 "mrbgems/mruby-compiler/core/parse.y"
+#line 3799 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_class(p, (yyvsp[-4].nd), (yyvsp[-3].nd), (yyvsp[-1].nd));
                       SET_LINENO((yyval.nd), (yyvsp[-5].num));
                       local_resume(p, (yyvsp[-2].nd));
                       nvars_unnest(p);
                     }
-#line 9802 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9806 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 331: /* @21: %empty  */
-#line 3803 "mrbgems/mruby-compiler/core/parse.y"
+#line 3807 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.num) = p->in_def;
                       p->in_def = 0;
                     }
-#line 9811 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9815 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 332: /* @22: %empty  */
-#line 3808 "mrbgems/mruby-compiler/core/parse.y"
+#line 3812 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = cons(local_switch(p), int_to_node(p->in_single));
                       nvars_block(p);
                       p->in_single = 0;
                     }
-#line 9821 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9825 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 333: /* primary: "'class'" "<<" expr @21 term @22 bodystmt "'end'"  */
-#line 3815 "mrbgems/mruby-compiler/core/parse.y"
+#line 3819 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_sclass(p, (yyvsp[-5].nd), (yyvsp[-1].nd));
                       SET_LINENO((yyval.nd), (yyvsp[-7].num));
@@ -9830,44 +9834,44 @@ yyreduce:
                       p->in_def = (yyvsp[-4].num);
                       p->in_single = node_to_int((yyvsp[-2].nd)->cdr);
                     }
-#line 9834 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9838 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 334: /* @23: %empty  */
-#line 3825 "mrbgems/mruby-compiler/core/parse.y"
+#line 3829 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       if (p->in_def || p->in_single)
                         yyerror(&(yylsp[-1]), p, "module definition in method body");
                       (yyval.nd) = local_switch(p);
                       nvars_block(p);
                     }
-#line 9845 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9849 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 335: /* primary: "'module'" cpath @23 bodystmt "'end'"  */
-#line 3833 "mrbgems/mruby-compiler/core/parse.y"
+#line 3837 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_module(p, (yyvsp[-3].nd), (yyvsp[-1].nd));
                       SET_LINENO((yyval.nd), (yyvsp[-4].num));
                       local_resume(p, (yyvsp[-2].nd));
                       nvars_unnest(p);
                     }
-#line 9856 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9860 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 336: /* primary: defn_head f_arglist bodystmt "'end'"  */
-#line 3843 "mrbgems/mruby-compiler/core/parse.y"
+#line 3847 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[-3].nd);
                       defn_setup(p, (yyval.nd), (yyvsp[-2].nd), (yyvsp[-1].nd));
                       nvars_unnest(p);
                       p->in_def--;
                     }
-#line 9867 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9871 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 337: /* primary: defs_head f_arglist bodystmt "'end'"  */
-#line 3853 "mrbgems/mruby-compiler/core/parse.y"
+#line 3857 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[-3].nd);
                       defs_setup(p, (yyval.nd), (yyvsp[-2].nd), (yyvsp[-1].nd));
@@ -9875,610 +9879,610 @@ yyreduce:
                       p->in_def--;
                       p->in_single--;
                     }
-#line 9879 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9883 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 338: /* primary: "'break'"  */
-#line 3861 "mrbgems/mruby-compiler/core/parse.y"
+#line 3865 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_break(p, 0);
                     }
-#line 9887 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9891 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 339: /* primary: "'next'"  */
-#line 3865 "mrbgems/mruby-compiler/core/parse.y"
+#line 3869 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_next(p, 0);
                     }
-#line 9895 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9899 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 340: /* primary: "'redo'"  */
-#line 3869 "mrbgems/mruby-compiler/core/parse.y"
+#line 3873 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_redo(p);
                     }
-#line 9903 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9907 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 341: /* primary: "'retry'"  */
-#line 3873 "mrbgems/mruby-compiler/core/parse.y"
+#line 3877 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_retry(p);
                     }
-#line 9911 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9915 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 342: /* primary_value: primary  */
-#line 3879 "mrbgems/mruby-compiler/core/parse.y"
+#line 3883 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[0].nd);
                       if (!(yyval.nd)) (yyval.nd) = new_nil(p);
                     }
-#line 9920 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9924 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 349: /* if_tail: "'elsif'" expr_value then compstmt if_tail  */
-#line 3898 "mrbgems/mruby-compiler/core/parse.y"
+#line 3902 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_if(p, cond((yyvsp[-3].nd)), (yyvsp[-1].nd), (yyvsp[0].nd));
                     }
-#line 9928 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9932 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 351: /* opt_else: "'else'" compstmt  */
-#line 3905 "mrbgems/mruby-compiler/core/parse.y"
+#line 3909 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[0].nd);
                     }
-#line 9936 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9940 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 352: /* for_var: lhs  */
-#line 3911 "mrbgems/mruby-compiler/core/parse.y"
+#line 3915 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list1(list1((yyvsp[0].nd)));
                     }
-#line 9944 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9948 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 354: /* f_margs: f_arg  */
-#line 3918 "mrbgems/mruby-compiler/core/parse.y"
+#line 3922 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list3((yyvsp[0].nd),0,0);
                     }
-#line 9952 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9956 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 355: /* f_margs: f_arg ',' "*" f_norm_arg  */
-#line 3922 "mrbgems/mruby-compiler/core/parse.y"
+#line 3926 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list3((yyvsp[-3].nd), new_arg(p, (yyvsp[0].id)), 0);
                     }
-#line 9960 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9964 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 356: /* f_margs: f_arg ',' "*" f_norm_arg ',' f_arg  */
-#line 3926 "mrbgems/mruby-compiler/core/parse.y"
+#line 3930 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list3((yyvsp[-5].nd), new_arg(p, (yyvsp[-2].id)), (yyvsp[0].nd));
                     }
-#line 9968 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9972 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 357: /* f_margs: f_arg ',' "*"  */
-#line 3930 "mrbgems/mruby-compiler/core/parse.y"
+#line 3934 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       local_add_f(p, intern_op(mul));
                       (yyval.nd) = list3((yyvsp[-2].nd), int_to_node(-1), 0);
                     }
-#line 9977 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9981 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 358: /* f_margs: f_arg ',' "*" ',' f_arg  */
-#line 3935 "mrbgems/mruby-compiler/core/parse.y"
+#line 3939 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list3((yyvsp[-4].nd), int_to_node(-1), (yyvsp[0].nd));
                     }
-#line 9985 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9989 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 359: /* f_margs: "*" f_norm_arg  */
-#line 3939 "mrbgems/mruby-compiler/core/parse.y"
+#line 3943 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list3(0, new_arg(p, (yyvsp[0].id)), 0);
                     }
-#line 9993 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9997 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 360: /* f_margs: "*" f_norm_arg ',' f_arg  */
-#line 3943 "mrbgems/mruby-compiler/core/parse.y"
+#line 3947 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list3(0, new_arg(p, (yyvsp[-2].id)), (yyvsp[0].nd));
                     }
-#line 10001 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10005 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 361: /* f_margs: "*"  */
-#line 3947 "mrbgems/mruby-compiler/core/parse.y"
+#line 3951 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       local_add_f(p, intern_op(mul));
                       (yyval.nd) = list3(0, int_to_node(-1), 0);
                     }
-#line 10010 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10014 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 362: /* $@24: %empty  */
-#line 3952 "mrbgems/mruby-compiler/core/parse.y"
+#line 3956 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       local_add_f(p, intern_op(mul));
                     }
-#line 10018 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10022 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 363: /* f_margs: "*" ',' $@24 f_arg  */
-#line 3956 "mrbgems/mruby-compiler/core/parse.y"
+#line 3960 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list3(0, int_to_node(-1), (yyvsp[0].nd));
                     }
-#line 10026 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10030 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 364: /* block_args_tail: f_block_kwarg ',' f_kwrest opt_f_block_arg  */
-#line 3962 "mrbgems/mruby-compiler/core/parse.y"
+#line 3966 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args_tail(p, (yyvsp[-3].nd), (yyvsp[-1].nd), (yyvsp[0].id));
                     }
-#line 10034 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10038 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 365: /* block_args_tail: f_block_kwarg opt_f_block_arg  */
-#line 3966 "mrbgems/mruby-compiler/core/parse.y"
+#line 3970 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args_tail(p, (yyvsp[-1].nd), 0, (yyvsp[0].id));
                     }
-#line 10042 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10046 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 366: /* block_args_tail: f_kwrest opt_f_block_arg  */
-#line 3970 "mrbgems/mruby-compiler/core/parse.y"
+#line 3974 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args_tail(p, 0, (yyvsp[-1].nd), (yyvsp[0].id));
                     }
-#line 10050 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10054 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 367: /* block_args_tail: f_block_arg  */
-#line 3974 "mrbgems/mruby-compiler/core/parse.y"
+#line 3978 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args_tail(p, 0, 0, (yyvsp[0].id));
                     }
-#line 10058 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10062 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 368: /* opt_block_args_tail: ',' block_args_tail  */
-#line 3980 "mrbgems/mruby-compiler/core/parse.y"
+#line 3984 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[0].nd);
                     }
-#line 10066 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10070 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 369: /* opt_block_args_tail: %empty  */
-#line 3984 "mrbgems/mruby-compiler/core/parse.y"
+#line 3988 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args_tail(p, 0, 0, 0);
                     }
-#line 10074 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10078 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 370: /* block_param: f_arg ',' f_block_optarg ',' f_rest_arg opt_block_args_tail  */
-#line 3990 "mrbgems/mruby-compiler/core/parse.y"
+#line 3994 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args(p, (yyvsp[-5].nd), (yyvsp[-3].nd), (yyvsp[-1].id), 0, (yyvsp[0].nd));
                     }
-#line 10082 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10086 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 371: /* block_param: f_arg ',' f_block_optarg ',' f_rest_arg ',' f_arg opt_block_args_tail  */
-#line 3994 "mrbgems/mruby-compiler/core/parse.y"
+#line 3998 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args(p, (yyvsp[-7].nd), (yyvsp[-5].nd), (yyvsp[-3].id), (yyvsp[-1].nd), (yyvsp[0].nd));
                     }
-#line 10090 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10094 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 372: /* block_param: f_arg ',' f_block_optarg opt_block_args_tail  */
-#line 3998 "mrbgems/mruby-compiler/core/parse.y"
+#line 4002 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args(p, (yyvsp[-3].nd), (yyvsp[-1].nd), 0, 0, (yyvsp[0].nd));
                     }
-#line 10098 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10102 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 373: /* block_param: f_arg ',' f_block_optarg ',' f_arg opt_block_args_tail  */
-#line 4002 "mrbgems/mruby-compiler/core/parse.y"
+#line 4006 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args(p, (yyvsp[-5].nd), (yyvsp[-3].nd), 0, (yyvsp[-1].nd), (yyvsp[0].nd));
                     }
-#line 10106 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10110 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 374: /* block_param: f_arg ',' f_rest_arg opt_block_args_tail  */
-#line 4006 "mrbgems/mruby-compiler/core/parse.y"
+#line 4010 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args(p, (yyvsp[-3].nd), 0, (yyvsp[-1].id), 0, (yyvsp[0].nd));
                     }
-#line 10114 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10118 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 375: /* block_param: f_arg ',' opt_block_args_tail  */
-#line 4010 "mrbgems/mruby-compiler/core/parse.y"
+#line 4014 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args(p, (yyvsp[-2].nd), 0, 0, 0, (yyvsp[0].nd));
                     }
-#line 10122 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10126 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 376: /* block_param: f_arg ',' f_rest_arg ',' f_arg opt_block_args_tail  */
-#line 4014 "mrbgems/mruby-compiler/core/parse.y"
+#line 4018 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args(p, (yyvsp[-5].nd), 0, (yyvsp[-3].id), (yyvsp[-1].nd), (yyvsp[0].nd));
                     }
-#line 10130 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10134 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 377: /* block_param: f_arg opt_block_args_tail  */
-#line 4018 "mrbgems/mruby-compiler/core/parse.y"
+#line 4022 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args(p, (yyvsp[-1].nd), 0, 0, 0, (yyvsp[0].nd));
                     }
-#line 10138 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10142 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 378: /* block_param: f_block_optarg ',' f_rest_arg opt_block_args_tail  */
-#line 4022 "mrbgems/mruby-compiler/core/parse.y"
+#line 4026 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args(p, 0, (yyvsp[-3].nd), (yyvsp[-1].id), 0, (yyvsp[0].nd));
                     }
-#line 10146 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10150 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 379: /* block_param: f_block_optarg ',' f_rest_arg ',' f_arg opt_block_args_tail  */
-#line 4026 "mrbgems/mruby-compiler/core/parse.y"
+#line 4030 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args(p, 0, (yyvsp[-5].nd), (yyvsp[-3].id), (yyvsp[-1].nd), (yyvsp[0].nd));
                     }
-#line 10154 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10158 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 380: /* block_param: f_block_optarg opt_block_args_tail  */
-#line 4030 "mrbgems/mruby-compiler/core/parse.y"
+#line 4034 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args(p, 0, (yyvsp[-1].nd), 0, 0, (yyvsp[0].nd));
                     }
-#line 10162 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10166 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 381: /* block_param: f_block_optarg ',' f_arg opt_block_args_tail  */
-#line 4034 "mrbgems/mruby-compiler/core/parse.y"
+#line 4038 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args(p, 0, (yyvsp[-3].nd), 0, (yyvsp[-1].nd), (yyvsp[0].nd));
                     }
-#line 10170 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10174 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 382: /* block_param: f_rest_arg opt_block_args_tail  */
-#line 4038 "mrbgems/mruby-compiler/core/parse.y"
+#line 4042 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args(p, 0, 0, (yyvsp[-1].id), 0, (yyvsp[0].nd));
                     }
-#line 10178 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10182 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 383: /* block_param: f_rest_arg ',' f_arg opt_block_args_tail  */
-#line 4042 "mrbgems/mruby-compiler/core/parse.y"
+#line 4046 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args(p, 0, 0, (yyvsp[-3].id), (yyvsp[-1].nd), (yyvsp[0].nd));
                     }
-#line 10186 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10190 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 384: /* block_param: block_args_tail  */
-#line 4046 "mrbgems/mruby-compiler/core/parse.y"
+#line 4050 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args(p, 0, 0, 0, 0, (yyvsp[0].nd));
                     }
-#line 10194 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10198 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 385: /* opt_block_param: none  */
-#line 4052 "mrbgems/mruby-compiler/core/parse.y"
+#line 4056 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       local_add_blk(p);
                       (yyval.nd) = 0;
                     }
-#line 10203 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10207 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 386: /* opt_block_param: block_param_def  */
-#line 4057 "mrbgems/mruby-compiler/core/parse.y"
+#line 4061 "mrbgems/mruby-compiler/core/parse.y"
                    {
                       p->cmd_start = TRUE;
                       (yyval.nd) = (yyvsp[0].nd);
                     }
-#line 10212 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10216 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 387: /* $@25: %empty  */
-#line 4063 "mrbgems/mruby-compiler/core/parse.y"
+#line 4067 "mrbgems/mruby-compiler/core/parse.y"
                       {local_add_blk(p);}
-#line 10218 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10222 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 388: /* block_param_def: '|' $@25 opt_bv_decl '|'  */
-#line 4064 "mrbgems/mruby-compiler/core/parse.y"
+#line 4068 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = 0;
                     }
-#line 10226 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10230 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 389: /* block_param_def: "||"  */
-#line 4068 "mrbgems/mruby-compiler/core/parse.y"
+#line 4072 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       local_add_blk(p);
                       (yyval.nd) = 0;
                     }
-#line 10235 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10239 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 390: /* block_param_def: '|' block_param opt_bv_decl '|'  */
-#line 4073 "mrbgems/mruby-compiler/core/parse.y"
+#line 4077 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[-2].nd);
                     }
-#line 10243 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10247 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 391: /* opt_bv_decl: opt_nl  */
-#line 4079 "mrbgems/mruby-compiler/core/parse.y"
-                    {
-                      (yyval.nd) = 0;
-                    }
-#line 10251 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 392: /* opt_bv_decl: opt_nl ';' bv_decls opt_nl  */
 #line 4083 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = 0;
                     }
-#line 10259 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10255 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 392: /* opt_bv_decl: opt_nl ';' bv_decls opt_nl  */
+#line 4087 "mrbgems/mruby-compiler/core/parse.y"
+                    {
+                      (yyval.nd) = 0;
+                    }
+#line 10263 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 395: /* bvar: "local variable or method"  */
-#line 4093 "mrbgems/mruby-compiler/core/parse.y"
+#line 4097 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       local_add_f(p, (yyvsp[0].id));
                       new_bv(p, (yyvsp[0].id));
                     }
-#line 10268 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10272 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 397: /* f_larglist: '(' f_args opt_bv_decl ')'  */
-#line 4101 "mrbgems/mruby-compiler/core/parse.y"
+#line 4105 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[-2].nd);
                     }
-#line 10276 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10280 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 398: /* f_larglist: f_args  */
-#line 4105 "mrbgems/mruby-compiler/core/parse.y"
+#line 4109 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[0].nd);
                     }
-#line 10284 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10288 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 399: /* lambda_body: tLAMBEG compstmt '}'  */
-#line 4111 "mrbgems/mruby-compiler/core/parse.y"
-                    {
-                      (yyval.nd) = (yyvsp[-1].nd);
-                    }
-#line 10292 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 400: /* lambda_body: "'do' for lambda" bodystmt "'end'"  */
 #line 4115 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[-1].nd);
                     }
-#line 10300 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10296 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 400: /* lambda_body: "'do' for lambda" bodystmt "'end'"  */
+#line 4119 "mrbgems/mruby-compiler/core/parse.y"
+                    {
+                      (yyval.nd) = (yyvsp[-1].nd);
+                    }
+#line 10304 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 401: /* @26: %empty  */
-#line 4121 "mrbgems/mruby-compiler/core/parse.y"
+#line 4125 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       local_nest(p);
                       nvars_nest(p);
                       (yyval.num) = p->lineno;
                     }
-#line 10310 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10314 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 402: /* do_block: "'do' for block" @26 opt_block_param bodystmt "'end'"  */
-#line 4129 "mrbgems/mruby-compiler/core/parse.y"
+#line 4133 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_block(p,(yyvsp[-2].nd),(yyvsp[-1].nd));
                       SET_LINENO((yyval.nd), (yyvsp[-3].num));
                       local_unnest(p);
                       nvars_unnest(p);
                     }
-#line 10321 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10325 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 403: /* block_call: command do_block  */
-#line 4138 "mrbgems/mruby-compiler/core/parse.y"
+#line 4142 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       call_with_block(p, (yyvsp[-1].nd), (yyvsp[0].nd));
                       (yyval.nd) = (yyvsp[-1].nd);
                     }
-#line 10330 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10334 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 404: /* block_call: block_call call_op2 operation2 opt_paren_args  */
-#line 4143 "mrbgems/mruby-compiler/core/parse.y"
+#line 4147 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_call(p, (yyvsp[-3].nd), (yyvsp[-1].id), (yyvsp[0].nd), (yyvsp[-2].num));
                     }
-#line 10338 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10342 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 405: /* block_call: block_call call_op2 operation2 opt_paren_args brace_block  */
-#line 4147 "mrbgems/mruby-compiler/core/parse.y"
+#line 4151 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_call(p, (yyvsp[-4].nd), (yyvsp[-2].id), (yyvsp[-1].nd), (yyvsp[-3].num));
                       call_with_block(p, (yyval.nd), (yyvsp[0].nd));
                     }
-#line 10347 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10351 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 406: /* block_call: block_call call_op2 operation2 command_args do_block  */
-#line 4152 "mrbgems/mruby-compiler/core/parse.y"
+#line 4156 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_call(p, (yyvsp[-4].nd), (yyvsp[-2].id), (yyvsp[-1].nd), (yyvsp[-3].num));
                       call_with_block(p, (yyval.nd), (yyvsp[0].nd));
                     }
-#line 10356 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10360 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 407: /* method_call: operation paren_args  */
-#line 4159 "mrbgems/mruby-compiler/core/parse.y"
+#line 4163 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_fcall(p, (yyvsp[-1].id), (yyvsp[0].nd));
                     }
-#line 10364 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10368 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 408: /* method_call: primary_value call_op operation2 opt_paren_args  */
-#line 4163 "mrbgems/mruby-compiler/core/parse.y"
+#line 4167 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_call(p, (yyvsp[-3].nd), (yyvsp[-1].id), (yyvsp[0].nd), (yyvsp[-2].num));
                     }
-#line 10372 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10376 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 409: /* method_call: primary_value "::" operation2 paren_args  */
-#line 4167 "mrbgems/mruby-compiler/core/parse.y"
+#line 4171 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_call(p, (yyvsp[-3].nd), (yyvsp[-1].id), (yyvsp[0].nd), tCOLON2);
                     }
-#line 10380 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10384 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 410: /* method_call: primary_value "::" operation3  */
-#line 4171 "mrbgems/mruby-compiler/core/parse.y"
+#line 4175 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_call(p, (yyvsp[-2].nd), (yyvsp[0].id), 0, tCOLON2);
                     }
-#line 10388 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10392 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 411: /* method_call: primary_value call_op paren_args  */
-#line 4175 "mrbgems/mruby-compiler/core/parse.y"
+#line 4179 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_call(p, (yyvsp[-2].nd), MRB_SYM_2(p->mrb, call), (yyvsp[0].nd), (yyvsp[-1].num));
                     }
-#line 10396 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10400 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 412: /* method_call: primary_value "::" paren_args  */
-#line 4179 "mrbgems/mruby-compiler/core/parse.y"
+#line 4183 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_call(p, (yyvsp[-2].nd), MRB_SYM_2(p->mrb, call), (yyvsp[0].nd), tCOLON2);
                     }
-#line 10404 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10408 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 413: /* method_call: "'super'" paren_args  */
-#line 4183 "mrbgems/mruby-compiler/core/parse.y"
+#line 4187 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_super(p, (yyvsp[0].nd));
                     }
-#line 10412 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10416 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 414: /* method_call: "'super'"  */
-#line 4187 "mrbgems/mruby-compiler/core/parse.y"
+#line 4191 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_zsuper(p);
                     }
-#line 10420 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10424 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 415: /* method_call: primary_value '[' opt_call_args ']'  */
-#line 4191 "mrbgems/mruby-compiler/core/parse.y"
+#line 4195 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_call(p, (yyvsp[-3].nd), intern_op(aref), (yyvsp[-1].nd), '.');
                     }
-#line 10428 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10432 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 416: /* @27: %empty  */
-#line 4197 "mrbgems/mruby-compiler/core/parse.y"
+#line 4201 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       local_nest(p);
                       nvars_nest(p);
                       (yyval.num) = p->lineno;
                     }
-#line 10438 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10442 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 417: /* brace_block: '{' @27 opt_block_param compstmt '}'  */
-#line 4204 "mrbgems/mruby-compiler/core/parse.y"
+#line 4208 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_block(p,(yyvsp[-2].nd),(yyvsp[-1].nd));
                       SET_LINENO((yyval.nd), (yyvsp[-3].num));
                       local_unnest(p);
                       nvars_unnest(p);
                     }
-#line 10449 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10453 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 418: /* @28: %empty  */
-#line 4211 "mrbgems/mruby-compiler/core/parse.y"
+#line 4215 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       local_nest(p);
                       nvars_nest(p);
                       (yyval.num) = p->lineno;
                     }
-#line 10459 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10463 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 419: /* brace_block: "'do'" @28 opt_block_param bodystmt "'end'"  */
-#line 4218 "mrbgems/mruby-compiler/core/parse.y"
+#line 4222 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_block(p,(yyvsp[-2].nd),(yyvsp[-1].nd));
                       SET_LINENO((yyval.nd), (yyvsp[-3].num));
                       local_unnest(p);
                       nvars_unnest(p);
                     }
-#line 10470 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10474 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 420: /* case_body: "'when'" args then compstmt cases  */
-#line 4229 "mrbgems/mruby-compiler/core/parse.y"
+#line 4233 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = cons(cons((yyvsp[-3].nd), (yyvsp[-1].nd)), (yyvsp[0].nd));
                     }
-#line 10478 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10482 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 421: /* cases: opt_else  */
-#line 4235 "mrbgems/mruby-compiler/core/parse.y"
+#line 4239 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       if ((yyvsp[0].nd)) {
                         (yyval.nd) = cons(cons(0, (yyvsp[0].nd)), 0);
@@ -10487,155 +10491,155 @@ yyreduce:
                         (yyval.nd) = 0;
                       }
                     }
-#line 10491 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10495 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 423: /* opt_rescue: "'rescue'" exc_list exc_var then compstmt opt_rescue  */
-#line 4249 "mrbgems/mruby-compiler/core/parse.y"
+#line 4253 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list1(list3((yyvsp[-4].nd), (yyvsp[-3].nd), (yyvsp[-1].nd)));
                       if ((yyvsp[0].nd)) (yyval.nd) = append((yyval.nd), (yyvsp[0].nd));
                     }
-#line 10500 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10504 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 425: /* exc_list: arg  */
-#line 4257 "mrbgems/mruby-compiler/core/parse.y"
+#line 4261 "mrbgems/mruby-compiler/core/parse.y"
                     {
                         (yyval.nd) = list1((yyvsp[0].nd));
                     }
-#line 10508 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10512 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 428: /* exc_var: "=>" lhs  */
-#line 4265 "mrbgems/mruby-compiler/core/parse.y"
+#line 4269 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[0].nd);
                     }
-#line 10516 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10520 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 430: /* opt_ensure: "'ensure'" compstmt  */
-#line 4272 "mrbgems/mruby-compiler/core/parse.y"
+#line 4276 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[0].nd);
                     }
-#line 10524 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10528 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 437: /* string: string string_fragment  */
-#line 4286 "mrbgems/mruby-compiler/core/parse.y"
+#line 4290 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = append((yyvsp[-1].nd), (yyvsp[0].nd));
                     }
-#line 10532 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10536 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 438: /* string_fragment: "character literal"  */
-#line 4292 "mrbgems/mruby-compiler/core/parse.y"
+#line 4296 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       /* tCHAR is (len . str), wrap as cons list */
                       (yyval.nd) = list1((yyvsp[0].nd));
                     }
-#line 10541 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10545 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 439: /* string_fragment: tSTRING  */
-#line 4297 "mrbgems/mruby-compiler/core/parse.y"
+#line 4301 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       /* tSTRING is (len . str), wrap as cons list */
                       (yyval.nd) = list1((yyvsp[0].nd));
                     }
-#line 10550 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10554 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 440: /* string_fragment: "string literal" tSTRING  */
-#line 4302 "mrbgems/mruby-compiler/core/parse.y"
+#line 4306 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       /* $2 is (len . str), wrap as cons list */
                       (yyval.nd) = list1((yyvsp[0].nd));
                     }
-#line 10559 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10563 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 441: /* string_fragment: "string literal" string_rep tSTRING  */
-#line 4307 "mrbgems/mruby-compiler/core/parse.y"
+#line 4311 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = push((yyvsp[-1].nd), (yyvsp[0].nd));
                     }
-#line 10567 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10571 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 443: /* string_rep: string_rep string_interp  */
-#line 4314 "mrbgems/mruby-compiler/core/parse.y"
+#line 4318 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = append((yyvsp[-1].nd), (yyvsp[0].nd));
                     }
-#line 10575 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10579 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 444: /* string_interp: tSTRING_MID  */
-#line 4320 "mrbgems/mruby-compiler/core/parse.y"
+#line 4324 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       /* $1 is already in (len . str) format */
                       (yyval.nd) = list1((yyvsp[0].nd));
                     }
-#line 10584 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10588 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 445: /* @29: %empty  */
-#line 4325 "mrbgems/mruby-compiler/core/parse.y"
+#line 4329 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = push_strterm(p);
                     }
-#line 10592 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10596 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 446: /* string_interp: tSTRING_PART @29 compstmt '}'  */
-#line 4330 "mrbgems/mruby-compiler/core/parse.y"
+#line 4334 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       pop_strterm(p,(yyvsp[-2].nd));
                       /* $1 is already in (len . str) format, create (-1 . node) for expression */
                       node *expr_elem = cons(int_to_node(-1), (yyvsp[-1].nd));
                       (yyval.nd) = list2((yyvsp[-3].nd), expr_elem);
                     }
-#line 10603 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10607 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 447: /* string_interp: tLITERAL_DELIM  */
-#line 4337 "mrbgems/mruby-compiler/core/parse.y"
-                    {
-                      (yyval.nd) = list1(new_literal_delim(p));
-                    }
-#line 10611 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 448: /* string_interp: tHD_LITERAL_DELIM heredoc_bodies  */
 #line 4341 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list1(new_literal_delim(p));
                     }
-#line 10619 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10615 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 448: /* string_interp: tHD_LITERAL_DELIM heredoc_bodies  */
+#line 4345 "mrbgems/mruby-compiler/core/parse.y"
+                    {
+                      (yyval.nd) = list1(new_literal_delim(p));
+                    }
+#line 10623 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 449: /* xstring: tXSTRING_BEG tXSTRING  */
-#line 4347 "mrbgems/mruby-compiler/core/parse.y"
+#line 4351 "mrbgems/mruby-compiler/core/parse.y"
                     {
                         (yyval.nd) = cons((yyvsp[0].nd), (node*)NULL);
                     }
-#line 10627 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10631 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 450: /* xstring: tXSTRING_BEG string_rep tXSTRING  */
-#line 4351 "mrbgems/mruby-compiler/core/parse.y"
+#line 4355 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = push((yyvsp[-1].nd), (yyvsp[0].nd));
                     }
-#line 10635 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10639 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 451: /* regexp: tREGEXP_BEG tREGEXP  */
-#line 4357 "mrbgems/mruby-compiler/core/parse.y"
+#line 4361 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       node *data = (yyvsp[0].nd);  /* ((len . pattern) . (flags . encoding)) */
                       const char *flags = (const char*)data->cdr->car;
@@ -10644,11 +10648,11 @@ yyreduce:
                       node *pattern_list = cons(data->car, (node*)NULL);
                       (yyval.nd) = new_dregx(p, pattern_list, flags, encoding);
                     }
-#line 10648 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10652 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 452: /* regexp: tREGEXP_BEG string_rep tREGEXP  */
-#line 4366 "mrbgems/mruby-compiler/core/parse.y"
+#line 4370 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       node *data = (yyvsp[0].nd);  /* ((len . pattern) . (flags . encoding)) */
                       const char *flags = (const char*)data->cdr->car;
@@ -10657,47 +10661,47 @@ yyreduce:
                       node *complete_list = push((yyvsp[-1].nd), data->car);
                       (yyval.nd) = new_dregx(p, complete_list, flags, encoding);
                     }
-#line 10661 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10665 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 456: /* heredoc_body: tHEREDOC_END  */
-#line 4384 "mrbgems/mruby-compiler/core/parse.y"
+#line 4388 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       parser_heredoc_info *info = parsing_heredoc_info(p);
                       info->doc = push(info->doc, new_str_empty(p));
                       heredoc_end(p);
                     }
-#line 10671 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10675 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 457: /* heredoc_body: heredoc_string_rep tHEREDOC_END  */
-#line 4390 "mrbgems/mruby-compiler/core/parse.y"
+#line 4394 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       heredoc_end(p);
                     }
-#line 10679 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10683 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 460: /* heredoc_string_interp: tHD_STRING_MID  */
-#line 4400 "mrbgems/mruby-compiler/core/parse.y"
+#line 4404 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       parser_heredoc_info *info = parsing_heredoc_info(p);
                       info->doc = push(info->doc, (yyvsp[0].nd));
                       heredoc_treat_nextline(p);
                     }
-#line 10689 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10693 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 461: /* @30: %empty  */
-#line 4406 "mrbgems/mruby-compiler/core/parse.y"
+#line 4410 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = push_strterm(p);
                     }
-#line 10697 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10701 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 462: /* heredoc_string_interp: tHD_STRING_PART @30 compstmt '}'  */
-#line 4411 "mrbgems/mruby-compiler/core/parse.y"
+#line 4415 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       pop_strterm(p, (yyvsp[-2].nd));
                       parser_heredoc_info *info = parsing_heredoc_info(p);
@@ -10705,37 +10709,37 @@ yyreduce:
                       node *expr_elem = cons(int_to_node(-1), (yyvsp[-1].nd));
                       info->doc = push(push(info->doc, (yyvsp[-3].nd)), expr_elem);
                     }
-#line 10709 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10713 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 463: /* words: tWORDS_BEG tSTRING  */
-#line 4421 "mrbgems/mruby-compiler/core/parse.y"
+#line 4425 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_words(p, list1((yyvsp[0].nd)));
                     }
-#line 10717 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10721 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 464: /* words: tWORDS_BEG string_rep tSTRING  */
-#line 4425 "mrbgems/mruby-compiler/core/parse.y"
+#line 4429 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       node *n = (yyvsp[-1].nd);
                       n = push(n, (yyvsp[0].nd));
                       (yyval.nd) = new_words(p, n);
                     }
-#line 10727 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10731 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 465: /* symbol: basic_symbol  */
-#line 4433 "mrbgems/mruby-compiler/core/parse.y"
+#line 4437 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_sym(p, (yyvsp[0].id));
                     }
-#line 10735 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10739 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 466: /* symbol: "symbol" "string literal" string_rep tSTRING  */
-#line 4437 "mrbgems/mruby-compiler/core/parse.y"
+#line 4441 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       node *n = (yyvsp[-1].nd);
                       p->lstate = EXPR_ENDARG;
@@ -10747,183 +10751,183 @@ yyreduce:
                       }
                       (yyval.nd) = new_dsym(p, new_str(p, n));
                     }
-#line 10751 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10755 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 467: /* symbol: "symbol" "numbered parameter"  */
-#line 4449 "mrbgems/mruby-compiler/core/parse.y"
+#line 4453 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       mrb_sym sym = intern_numparam((yyvsp[0].num));
                       (yyval.nd) = new_sym(p, sym);
                     }
-#line 10760 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10764 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 468: /* basic_symbol: "symbol" sym  */
-#line 4456 "mrbgems/mruby-compiler/core/parse.y"
+#line 4460 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       p->lstate = EXPR_END;
                       (yyval.id) = (yyvsp[0].id);
                     }
-#line 10769 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10773 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 473: /* sym: tSTRING  */
-#line 4467 "mrbgems/mruby-compiler/core/parse.y"
-                    {
-                      (yyval.id) = new_strsym(p, (yyvsp[0].nd));
-                    }
-#line 10777 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 474: /* sym: "string literal" tSTRING  */
 #line 4471 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.id) = new_strsym(p, (yyvsp[0].nd));
                     }
-#line 10785 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10781 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 474: /* sym: "string literal" tSTRING  */
+#line 4475 "mrbgems/mruby-compiler/core/parse.y"
+                    {
+                      (yyval.id) = new_strsym(p, (yyvsp[0].nd));
+                    }
+#line 10789 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 475: /* symbols: tSYMBOLS_BEG tSTRING  */
-#line 4477 "mrbgems/mruby-compiler/core/parse.y"
+#line 4481 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_symbols(p, list1((yyvsp[0].nd)));
                     }
-#line 10793 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10797 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 476: /* symbols: tSYMBOLS_BEG string_rep tSTRING  */
-#line 4481 "mrbgems/mruby-compiler/core/parse.y"
+#line 4485 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       node *n = (yyvsp[-1].nd);
                       n = push(n, (yyvsp[0].nd));
                       (yyval.nd) = new_symbols(p, n);
                     }
-#line 10803 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10807 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 479: /* numeric: tUMINUS_NUM "integer literal"  */
-#line 4491 "mrbgems/mruby-compiler/core/parse.y"
-                    {
-                      (yyval.nd) = new_negate(p, (yyvsp[0].nd));
-                    }
-#line 10811 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 480: /* numeric: tUMINUS_NUM "float literal"  */
 #line 4495 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_negate(p, (yyvsp[0].nd));
                     }
-#line 10819 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10815 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 480: /* numeric: tUMINUS_NUM "float literal"  */
+#line 4499 "mrbgems/mruby-compiler/core/parse.y"
+                    {
+                      (yyval.nd) = new_negate(p, (yyvsp[0].nd));
+                    }
+#line 10823 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 481: /* variable: "local variable or method"  */
-#line 4501 "mrbgems/mruby-compiler/core/parse.y"
+#line 4505 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_lvar(p, (yyvsp[0].id));
                     }
-#line 10827 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10831 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 482: /* variable: "instance variable"  */
-#line 4505 "mrbgems/mruby-compiler/core/parse.y"
+#line 4509 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_ivar(p, (yyvsp[0].id));
                     }
-#line 10835 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10839 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 483: /* variable: "global variable"  */
-#line 4509 "mrbgems/mruby-compiler/core/parse.y"
+#line 4513 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_gvar(p, (yyvsp[0].id));
                     }
-#line 10843 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10847 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 484: /* variable: "class variable"  */
-#line 4513 "mrbgems/mruby-compiler/core/parse.y"
+#line 4517 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_cvar(p, (yyvsp[0].id));
                     }
-#line 10851 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10855 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 485: /* variable: "constant"  */
-#line 4517 "mrbgems/mruby-compiler/core/parse.y"
+#line 4521 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_const(p, (yyvsp[0].id));
                     }
-#line 10859 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10863 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 486: /* var_lhs: variable  */
-#line 4523 "mrbgems/mruby-compiler/core/parse.y"
+#line 4527 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       assignable(p, (yyvsp[0].nd));
                     }
-#line 10867 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10871 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 487: /* var_lhs: "numbered parameter"  */
-#line 4527 "mrbgems/mruby-compiler/core/parse.y"
+#line 4531 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       yyerror(&(yylsp[0]), p, "can't assign to numbered parameter");
                     }
-#line 10875 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10879 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 488: /* var_ref: variable  */
-#line 4533 "mrbgems/mruby-compiler/core/parse.y"
+#line 4537 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = var_reference(p, (yyvsp[0].nd));
                     }
-#line 10883 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10887 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 489: /* var_ref: "numbered parameter"  */
-#line 4537 "mrbgems/mruby-compiler/core/parse.y"
+#line 4541 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_nvar(p, (yyvsp[0].num));
                     }
-#line 10891 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10895 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 490: /* var_ref: "'nil'"  */
-#line 4541 "mrbgems/mruby-compiler/core/parse.y"
+#line 4545 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_nil(p);
                     }
-#line 10899 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10903 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 491: /* var_ref: "'self'"  */
-#line 4545 "mrbgems/mruby-compiler/core/parse.y"
+#line 4549 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_self(p);
                     }
-#line 10907 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10911 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 492: /* var_ref: "'true'"  */
-#line 4549 "mrbgems/mruby-compiler/core/parse.y"
+#line 4553 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_true(p);
                     }
-#line 10915 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10919 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 493: /* var_ref: "'false'"  */
-#line 4553 "mrbgems/mruby-compiler/core/parse.y"
+#line 4557 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_false(p);
                     }
-#line 10923 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10927 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 494: /* var_ref: "'__FILE__'"  */
-#line 4557 "mrbgems/mruby-compiler/core/parse.y"
+#line 4561 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       const char *fn = mrb_sym_name_len(p->mrb, p->filename_sym, NULL);
                       if (!fn) {
@@ -10931,686 +10935,686 @@ yyreduce:
                       }
                       (yyval.nd) = new_str(p, cons(cons(int_to_node(strlen(fn)), (node*)fn), (node*)NULL));
                     }
-#line 10935 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10939 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 495: /* var_ref: "'__LINE__'"  */
-#line 4565 "mrbgems/mruby-compiler/core/parse.y"
+#line 4569 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       char buf[16];
 
                       dump_int(p->lineno, buf);
                       (yyval.nd) = new_int(p, buf, 10, 0);
                     }
-#line 10946 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10950 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 496: /* var_ref: "'__ENCODING__'"  */
-#line 4572 "mrbgems/mruby-compiler/core/parse.y"
+#line 4576 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_fcall(p, MRB_SYM_2(p->mrb, __ENCODING__), 0);
                     }
-#line 10954 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10958 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 499: /* superclass: %empty  */
-#line 4582 "mrbgems/mruby-compiler/core/parse.y"
+#line 4586 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = 0;
                     }
-#line 10962 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10966 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 500: /* $@31: %empty  */
-#line 4586 "mrbgems/mruby-compiler/core/parse.y"
+#line 4590 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       p->lstate = EXPR_BEG;
                       p->cmd_start = TRUE;
                     }
-#line 10971 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10975 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 501: /* superclass: '<' $@31 expr_value term  */
-#line 4591 "mrbgems/mruby-compiler/core/parse.y"
+#line 4595 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[-1].nd);
                     }
-#line 10979 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10983 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 504: /* f_arglist_paren: '(' f_args rparen  */
-#line 4607 "mrbgems/mruby-compiler/core/parse.y"
+#line 4611 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[-1].nd);
                       p->lstate = EXPR_BEG;
                       p->cmd_start = TRUE;
                     }
-#line 10989 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10993 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 505: /* f_arglist_paren: '(' f_arg ',' tBDOT3 rparen  */
-#line 4613 "mrbgems/mruby-compiler/core/parse.y"
+#line 4617 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args_dots(p, (yyvsp[-3].nd));
                     }
-#line 10997 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11001 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 506: /* f_arglist_paren: '(' tBDOT3 rparen  */
-#line 4617 "mrbgems/mruby-compiler/core/parse.y"
+#line 4621 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args_dots(p, 0);
                     }
-#line 11005 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11009 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 508: /* f_arglist: f_args term  */
-#line 4624 "mrbgems/mruby-compiler/core/parse.y"
+#line 4628 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[-1].nd);
                     }
-#line 11013 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11017 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 509: /* f_arglist: f_arg ',' tBDOT3 term  */
-#line 4628 "mrbgems/mruby-compiler/core/parse.y"
+#line 4632 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args_dots(p, (yyvsp[-3].nd));
                     }
-#line 11021 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11025 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 510: /* f_arglist: "..." term  */
-#line 4632 "mrbgems/mruby-compiler/core/parse.y"
+#line 4636 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args_dots(p, 0);
                     }
-#line 11029 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11033 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 511: /* f_label: "local variable or method" "label"  */
-#line 4638 "mrbgems/mruby-compiler/core/parse.y"
-                    {
-                      local_nest(p);
-                    }
-#line 11037 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 512: /* f_label: "numbered parameter" "label"  */
 #line 4642 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       local_nest(p);
                     }
-#line 11045 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11041 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 512: /* f_label: "numbered parameter" "label"  */
+#line 4646 "mrbgems/mruby-compiler/core/parse.y"
+                    {
+                      local_nest(p);
+                    }
+#line 11049 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 513: /* f_kw: f_label arg  */
-#line 4648 "mrbgems/mruby-compiler/core/parse.y"
+#line 4652 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       void_expr_error(p, (yyvsp[0].nd));
                       (yyval.nd) = new_kw_arg(p, (yyvsp[-1].id), cons((yyvsp[0].nd), locals_node(p)));
                       local_unnest(p);
                     }
-#line 11055 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11059 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 514: /* f_kw: f_label  */
-#line 4654 "mrbgems/mruby-compiler/core/parse.y"
+#line 4658 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_kw_arg(p, (yyvsp[0].id), 0);
                       local_unnest(p);
                     }
-#line 11064 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11068 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 515: /* f_block_kw: f_label primary_value  */
-#line 4661 "mrbgems/mruby-compiler/core/parse.y"
+#line 4665 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       void_expr_error(p, (yyvsp[0].nd));
                       (yyval.nd) = new_kw_arg(p, (yyvsp[-1].id), cons((yyvsp[0].nd), locals_node(p)));
                       local_unnest(p);
                     }
-#line 11074 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11078 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 516: /* f_block_kw: f_label  */
-#line 4667 "mrbgems/mruby-compiler/core/parse.y"
+#line 4671 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_kw_arg(p, (yyvsp[0].id), 0);
                       local_unnest(p);
                     }
-#line 11083 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11087 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 517: /* f_block_kwarg: f_block_kw  */
-#line 4674 "mrbgems/mruby-compiler/core/parse.y"
+#line 4678 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list1((yyvsp[0].nd));
                     }
-#line 11091 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11095 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 518: /* f_block_kwarg: f_block_kwarg ',' f_block_kw  */
-#line 4678 "mrbgems/mruby-compiler/core/parse.y"
+#line 4682 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = push((yyvsp[-2].nd), (yyvsp[0].nd));
                     }
-#line 11099 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11103 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 519: /* f_kwarg: f_kw  */
-#line 4684 "mrbgems/mruby-compiler/core/parse.y"
+#line 4688 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list1((yyvsp[0].nd));
                     }
-#line 11107 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11111 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 520: /* f_kwarg: f_kwarg ',' f_kw  */
-#line 4688 "mrbgems/mruby-compiler/core/parse.y"
+#line 4692 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = push((yyvsp[-2].nd), (yyvsp[0].nd));
                     }
-#line 11115 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11119 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 523: /* f_kwrest: kwrest_mark "local variable or method"  */
-#line 4698 "mrbgems/mruby-compiler/core/parse.y"
+#line 4702 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_kw_rest_args(p, (yyvsp[0].id));
                     }
-#line 11123 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11127 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 524: /* f_kwrest: kwrest_mark  */
-#line 4702 "mrbgems/mruby-compiler/core/parse.y"
+#line 4706 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_kw_rest_args(p, 0);
                     }
-#line 11131 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11135 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 525: /* args_tail: f_kwarg ',' f_kwrest opt_f_block_arg  */
-#line 4708 "mrbgems/mruby-compiler/core/parse.y"
+#line 4712 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args_tail(p, (yyvsp[-3].nd), (yyvsp[-1].nd), (yyvsp[0].id));
                     }
-#line 11139 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11143 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 526: /* args_tail: f_kwarg opt_f_block_arg  */
-#line 4712 "mrbgems/mruby-compiler/core/parse.y"
+#line 4716 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args_tail(p, (yyvsp[-1].nd), 0, (yyvsp[0].id));
                     }
-#line 11147 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11151 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 527: /* args_tail: f_kwrest opt_f_block_arg  */
-#line 4716 "mrbgems/mruby-compiler/core/parse.y"
+#line 4720 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args_tail(p, 0, (yyvsp[-1].nd), (yyvsp[0].id));
                     }
-#line 11155 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11159 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 528: /* args_tail: f_block_arg  */
-#line 4720 "mrbgems/mruby-compiler/core/parse.y"
+#line 4724 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args_tail(p, 0, 0, (yyvsp[0].id));
                     }
-#line 11163 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11167 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 529: /* opt_args_tail: ',' args_tail  */
-#line 4726 "mrbgems/mruby-compiler/core/parse.y"
+#line 4730 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[0].nd);
                     }
-#line 11171 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11175 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 530: /* opt_args_tail: %empty  */
-#line 4730 "mrbgems/mruby-compiler/core/parse.y"
+#line 4734 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args_tail(p, 0, 0, 0);
                     }
-#line 11179 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11183 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 531: /* f_args: f_arg ',' f_optarg ',' f_rest_arg opt_args_tail  */
-#line 4736 "mrbgems/mruby-compiler/core/parse.y"
+#line 4740 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args(p, (yyvsp[-5].nd), (yyvsp[-3].nd), (yyvsp[-1].id), 0, (yyvsp[0].nd));
                     }
-#line 11187 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11191 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 532: /* f_args: f_arg ',' f_optarg ',' f_rest_arg ',' f_arg opt_args_tail  */
-#line 4740 "mrbgems/mruby-compiler/core/parse.y"
+#line 4744 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args(p, (yyvsp[-7].nd), (yyvsp[-5].nd), (yyvsp[-3].id), (yyvsp[-1].nd), (yyvsp[0].nd));
                     }
-#line 11195 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11199 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 533: /* f_args: f_arg ',' f_optarg opt_args_tail  */
-#line 4744 "mrbgems/mruby-compiler/core/parse.y"
+#line 4748 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args(p, (yyvsp[-3].nd), (yyvsp[-1].nd), 0, 0, (yyvsp[0].nd));
                     }
-#line 11203 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11207 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 534: /* f_args: f_arg ',' f_optarg ',' f_arg opt_args_tail  */
-#line 4748 "mrbgems/mruby-compiler/core/parse.y"
+#line 4752 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args(p, (yyvsp[-5].nd), (yyvsp[-3].nd), 0, (yyvsp[-1].nd), (yyvsp[0].nd));
                     }
-#line 11211 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11215 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 535: /* f_args: f_arg ',' f_rest_arg opt_args_tail  */
-#line 4752 "mrbgems/mruby-compiler/core/parse.y"
+#line 4756 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args(p, (yyvsp[-3].nd), 0, (yyvsp[-1].id), 0, (yyvsp[0].nd));
                     }
-#line 11219 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11223 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 536: /* f_args: f_arg ',' f_rest_arg ',' f_arg opt_args_tail  */
-#line 4756 "mrbgems/mruby-compiler/core/parse.y"
+#line 4760 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args(p, (yyvsp[-5].nd), 0, (yyvsp[-3].id), (yyvsp[-1].nd), (yyvsp[0].nd));
                     }
-#line 11227 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11231 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 537: /* f_args: f_arg opt_args_tail  */
-#line 4760 "mrbgems/mruby-compiler/core/parse.y"
+#line 4764 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args(p, (yyvsp[-1].nd), 0, 0, 0, (yyvsp[0].nd));
                     }
-#line 11235 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11239 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 538: /* f_args: f_optarg ',' f_rest_arg opt_args_tail  */
-#line 4764 "mrbgems/mruby-compiler/core/parse.y"
+#line 4768 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args(p, 0, (yyvsp[-3].nd), (yyvsp[-1].id), 0, (yyvsp[0].nd));
                     }
-#line 11243 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11247 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 539: /* f_args: f_optarg ',' f_rest_arg ',' f_arg opt_args_tail  */
-#line 4768 "mrbgems/mruby-compiler/core/parse.y"
+#line 4772 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args(p, 0, (yyvsp[-5].nd), (yyvsp[-3].id), (yyvsp[-1].nd), (yyvsp[0].nd));
                     }
-#line 11251 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11255 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 540: /* f_args: f_optarg opt_args_tail  */
-#line 4772 "mrbgems/mruby-compiler/core/parse.y"
+#line 4776 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args(p, 0, (yyvsp[-1].nd), 0, 0, (yyvsp[0].nd));
                     }
-#line 11259 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11263 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 541: /* f_args: f_optarg ',' f_arg opt_args_tail  */
-#line 4776 "mrbgems/mruby-compiler/core/parse.y"
+#line 4780 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args(p, 0, (yyvsp[-3].nd), 0, (yyvsp[-1].nd), (yyvsp[0].nd));
                     }
-#line 11267 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11271 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 542: /* f_args: f_rest_arg opt_args_tail  */
-#line 4780 "mrbgems/mruby-compiler/core/parse.y"
+#line 4784 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args(p, 0, 0, (yyvsp[-1].id), 0, (yyvsp[0].nd));
                     }
-#line 11275 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11279 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 543: /* f_args: f_rest_arg ',' f_arg opt_args_tail  */
-#line 4784 "mrbgems/mruby-compiler/core/parse.y"
+#line 4788 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args(p, 0, 0, (yyvsp[-3].id), (yyvsp[-1].nd), (yyvsp[0].nd));
                     }
-#line 11283 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11287 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 544: /* f_args: args_tail  */
-#line 4788 "mrbgems/mruby-compiler/core/parse.y"
+#line 4792 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args(p, 0, 0, 0, 0, (yyvsp[0].nd));
                     }
-#line 11291 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11295 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 545: /* f_args: %empty  */
-#line 4792 "mrbgems/mruby-compiler/core/parse.y"
+#line 4796 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       local_add_f(p, 0);
                       (yyval.nd) = new_args(p, 0, 0, 0, 0, 0);
                     }
-#line 11300 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11304 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 546: /* f_bad_arg: "constant"  */
-#line 4799 "mrbgems/mruby-compiler/core/parse.y"
+#line 4803 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       yyerror(&(yylsp[0]), p, "formal argument cannot be a constant");
                       (yyval.nd) = 0;
                     }
-#line 11309 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11313 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 547: /* f_bad_arg: "instance variable"  */
-#line 4804 "mrbgems/mruby-compiler/core/parse.y"
+#line 4808 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       yyerror(&(yylsp[0]), p, "formal argument cannot be an instance variable");
                       (yyval.nd) = 0;
                     }
-#line 11318 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11322 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 548: /* f_bad_arg: "global variable"  */
-#line 4809 "mrbgems/mruby-compiler/core/parse.y"
+#line 4813 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       yyerror(&(yylsp[0]), p, "formal argument cannot be a global variable");
                       (yyval.nd) = 0;
                     }
-#line 11327 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11331 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 549: /* f_bad_arg: "class variable"  */
-#line 4814 "mrbgems/mruby-compiler/core/parse.y"
+#line 4818 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       yyerror(&(yylsp[0]), p, "formal argument cannot be a class variable");
                       (yyval.nd) = 0;
                     }
-#line 11336 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11340 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 550: /* f_bad_arg: "numbered parameter"  */
-#line 4819 "mrbgems/mruby-compiler/core/parse.y"
+#line 4823 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       yyerror(&(yylsp[0]), p, "formal argument cannot be a numbered parameter");
                       (yyval.nd) = 0;
                     }
-#line 11345 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11349 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 551: /* f_norm_arg: f_bad_arg  */
-#line 4826 "mrbgems/mruby-compiler/core/parse.y"
+#line 4830 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.id) = 0;
                     }
-#line 11353 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11357 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 552: /* f_norm_arg: "local variable or method"  */
-#line 4830 "mrbgems/mruby-compiler/core/parse.y"
+#line 4834 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       local_add_f(p, (yyvsp[0].id));
                       (yyval.id) = (yyvsp[0].id);
                     }
-#line 11362 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11366 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 553: /* f_arg_item: f_norm_arg  */
-#line 4837 "mrbgems/mruby-compiler/core/parse.y"
+#line 4841 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_arg(p, (yyvsp[0].id));
                     }
-#line 11370 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11374 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 554: /* @32: %empty  */
-#line 4841 "mrbgems/mruby-compiler/core/parse.y"
+#line 4845 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = local_switch(p);
                     }
-#line 11378 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11382 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 555: /* f_arg_item: tLPAREN @32 f_margs rparen  */
-#line 4845 "mrbgems/mruby-compiler/core/parse.y"
+#line 4849 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_masgn_param(p, (yyvsp[-1].nd), p->locals->car);
                       local_resume(p, (yyvsp[-2].nd));
                       local_add_f(p, 0);
                     }
-#line 11388 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11392 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 556: /* f_arg: f_arg_item  */
-#line 4853 "mrbgems/mruby-compiler/core/parse.y"
+#line 4857 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list1((yyvsp[0].nd));
                     }
-#line 11396 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11400 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 557: /* f_arg: f_arg ',' f_arg_item  */
-#line 4857 "mrbgems/mruby-compiler/core/parse.y"
+#line 4861 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = push((yyvsp[-2].nd), (yyvsp[0].nd));
                     }
-#line 11404 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11408 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 558: /* f_opt_asgn: "local variable or method" '='  */
-#line 4863 "mrbgems/mruby-compiler/core/parse.y"
+#line 4867 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       local_add_f(p, (yyvsp[-1].id));
                       local_nest(p);
                       (yyval.id) = (yyvsp[-1].id);
                     }
-#line 11414 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11418 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 559: /* f_opt: f_opt_asgn arg  */
-#line 4871 "mrbgems/mruby-compiler/core/parse.y"
+#line 4875 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       void_expr_error(p, (yyvsp[0].nd));
                       (yyval.nd) = cons(sym_to_node((yyvsp[-1].id)), cons((yyvsp[0].nd), locals_node(p)));
                       local_unnest(p);
                     }
-#line 11424 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11428 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 560: /* f_block_opt: f_opt_asgn primary_value  */
-#line 4879 "mrbgems/mruby-compiler/core/parse.y"
+#line 4883 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       void_expr_error(p, (yyvsp[0].nd));
                       (yyval.nd) = cons(sym_to_node((yyvsp[-1].id)), cons((yyvsp[0].nd), locals_node(p)));
                       local_unnest(p);
                     }
-#line 11434 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11438 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 561: /* f_block_optarg: f_block_opt  */
-#line 4887 "mrbgems/mruby-compiler/core/parse.y"
+#line 4891 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list1((yyvsp[0].nd));
                     }
-#line 11442 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11446 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 562: /* f_block_optarg: f_block_optarg ',' f_block_opt  */
-#line 4891 "mrbgems/mruby-compiler/core/parse.y"
+#line 4895 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = push((yyvsp[-2].nd), (yyvsp[0].nd));
                     }
-#line 11450 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11454 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 563: /* f_optarg: f_opt  */
-#line 4897 "mrbgems/mruby-compiler/core/parse.y"
+#line 4901 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list1((yyvsp[0].nd));
                     }
-#line 11458 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11462 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 564: /* f_optarg: f_optarg ',' f_opt  */
-#line 4901 "mrbgems/mruby-compiler/core/parse.y"
+#line 4905 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = push((yyvsp[-2].nd), (yyvsp[0].nd));
                     }
-#line 11466 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11470 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 567: /* f_rest_arg: restarg_mark "local variable or method"  */
-#line 4911 "mrbgems/mruby-compiler/core/parse.y"
+#line 4915 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       local_add_f(p, (yyvsp[0].id));
                       (yyval.id) = (yyvsp[0].id);
                     }
-#line 11475 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11479 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 568: /* f_rest_arg: restarg_mark  */
-#line 4916 "mrbgems/mruby-compiler/core/parse.y"
+#line 4920 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.id) = intern_op(mul);
                       local_add_f(p, (yyval.id));
                     }
-#line 11484 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11488 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 571: /* f_block_arg: blkarg_mark "local variable or method"  */
-#line 4927 "mrbgems/mruby-compiler/core/parse.y"
+#line 4931 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.id) = (yyvsp[0].id);
                     }
-#line 11492 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11496 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 572: /* f_block_arg: blkarg_mark  */
-#line 4931 "mrbgems/mruby-compiler/core/parse.y"
+#line 4935 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.id) = intern_op(and);
                     }
-#line 11500 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11504 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 573: /* opt_f_block_arg: ',' f_block_arg  */
-#line 4937 "mrbgems/mruby-compiler/core/parse.y"
+#line 4941 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.id) = (yyvsp[0].id);
                     }
-#line 11508 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11512 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 574: /* opt_f_block_arg: none  */
-#line 4941 "mrbgems/mruby-compiler/core/parse.y"
+#line 4945 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.id) = 0;
                     }
-#line 11516 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11520 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 575: /* singleton: var_ref  */
-#line 4947 "mrbgems/mruby-compiler/core/parse.y"
+#line 4951 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       prohibit_literals(p, (yyvsp[0].nd));
                       (yyval.nd) = (yyvsp[0].nd);
                       if (!(yyval.nd)) (yyval.nd) = new_nil(p);
                     }
-#line 11526 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11530 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 576: /* $@33: %empty  */
-#line 4952 "mrbgems/mruby-compiler/core/parse.y"
+#line 4956 "mrbgems/mruby-compiler/core/parse.y"
                       {p->lstate = EXPR_BEG;}
-#line 11532 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11536 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 577: /* singleton: '(' $@33 expr rparen  */
-#line 4953 "mrbgems/mruby-compiler/core/parse.y"
+#line 4957 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       prohibit_literals(p, (yyvsp[-1].nd));
                       (yyval.nd) = (yyvsp[-1].nd);
                     }
-#line 11541 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11545 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 579: /* assoc_list: assocs trailer  */
-#line 4961 "mrbgems/mruby-compiler/core/parse.y"
+#line 4965 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[-1].nd);
                     }
-#line 11549 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11553 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 580: /* assocs: assoc  */
-#line 4967 "mrbgems/mruby-compiler/core/parse.y"
+#line 4971 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list1((yyvsp[0].nd));
                     }
-#line 11557 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11561 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 581: /* assocs: assocs comma assoc  */
-#line 4971 "mrbgems/mruby-compiler/core/parse.y"
+#line 4975 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = push((yyvsp[-2].nd), (yyvsp[0].nd));
                     }
-#line 11565 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11569 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 582: /* assoc: arg "=>" arg  */
-#line 4977 "mrbgems/mruby-compiler/core/parse.y"
+#line 4981 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       void_expr_error(p, (yyvsp[-2].nd));
                       void_expr_error(p, (yyvsp[0].nd));
                       (yyval.nd) = cons((yyvsp[-2].nd), (yyvsp[0].nd));
                     }
-#line 11575 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11579 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 583: /* assoc: "local variable or method" "label" arg  */
-#line 4983 "mrbgems/mruby-compiler/core/parse.y"
+#line 4987 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       void_expr_error(p, (yyvsp[0].nd));
                       (yyval.nd) = cons(new_sym(p, (yyvsp[-2].id)), (yyvsp[0].nd));
                     }
-#line 11584 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11588 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 584: /* assoc: "local variable or method" "label"  */
-#line 4988 "mrbgems/mruby-compiler/core/parse.y"
+#line 4992 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = cons(new_sym(p, (yyvsp[-1].id)), label_reference(p, (yyvsp[-1].id)));
                     }
-#line 11592 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11596 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 585: /* assoc: "numbered parameter" "label"  */
-#line 4992 "mrbgems/mruby-compiler/core/parse.y"
+#line 4996 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       mrb_sym sym = intern_numparam((yyvsp[-1].num));
                       (yyval.nd) = cons(new_sym(p, sym), label_reference(p, sym));
                     }
-#line 11601 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11605 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 586: /* assoc: "numbered parameter" "label" arg  */
-#line 4997 "mrbgems/mruby-compiler/core/parse.y"
+#line 5001 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       void_expr_error(p, (yyvsp[0].nd));
                       (yyval.nd) = cons(new_sym(p, intern_numparam((yyvsp[-2].num))), (yyvsp[0].nd));
                     }
-#line 11610 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11614 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 587: /* assoc: string_fragment "label" arg  */
-#line 5002 "mrbgems/mruby-compiler/core/parse.y"
+#line 5006 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       void_expr_error(p, (yyvsp[0].nd));
                       if ((yyvsp[-2].nd)->cdr) {
@@ -11626,75 +11630,75 @@ yyreduce:
                         (yyval.nd) = cons(new_sym(p, new_strsym(p, (yyvsp[-2].nd)->car)), (yyvsp[0].nd));
                       }
                     }
-#line 11630 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11634 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 588: /* assoc: "**" arg  */
-#line 5018 "mrbgems/mruby-compiler/core/parse.y"
+#line 5022 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       void_expr_error(p, (yyvsp[0].nd));
                       (yyval.nd) = cons(new_kw_rest_args(p, 0), (yyvsp[0].nd));
                     }
-#line 11639 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11643 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 589: /* assoc: "**"  */
-#line 5023 "mrbgems/mruby-compiler/core/parse.y"
+#line 5027 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = cons(new_kw_rest_args(p, 0), new_lvar(p, intern_op(pow)));
                     }
-#line 11647 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11651 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 602: /* call_op: '.'  */
-#line 5049 "mrbgems/mruby-compiler/core/parse.y"
+#line 5053 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.num) = '.';
                     }
-#line 11655 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11659 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 603: /* call_op: "&."  */
-#line 5053 "mrbgems/mruby-compiler/core/parse.y"
+#line 5057 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.num) = 0;
                     }
-#line 11663 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11667 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 605: /* call_op2: "::"  */
-#line 5060 "mrbgems/mruby-compiler/core/parse.y"
+#line 5064 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.num) = tCOLON2;
                     }
-#line 11671 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11675 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 614: /* term: ';'  */
-#line 5081 "mrbgems/mruby-compiler/core/parse.y"
+#line 5085 "mrbgems/mruby-compiler/core/parse.y"
                       {yyerrok;}
-#line 11677 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11681 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 616: /* nl: '\n'  */
-#line 5086 "mrbgems/mruby-compiler/core/parse.y"
+#line 5090 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       p->lineno += (yyvsp[0].num);
                       p->column = 0;
                     }
-#line 11686 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11690 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 620: /* none: %empty  */
-#line 5098 "mrbgems/mruby-compiler/core/parse.y"
+#line 5102 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = 0;
                     }
-#line 11694 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11698 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
 
-#line 11698 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11702 "mrbgems/mruby-compiler/core/y.tab.c"
 
       default: break;
     }
@@ -11927,7 +11931,7 @@ yyreturnlab:
   return yyresult;
 }
 
-#line 5102 "mrbgems/mruby-compiler/core/parse.y"
+#line 5106 "mrbgems/mruby-compiler/core/parse.y"
 
 #define pylval  (*((YYSTYPE*)(p->ylval)))
 
@@ -14481,7 +14485,7 @@ mrb_parser_new(mrb_state *mrb)
     p->var_alloc_counts[i] = 0;
   }
   p->var_total_allocated = 0;
-  p->var_nodes_enabled = TRUE;   /* Enable variable-sized nodes by default */
+  p->var_nodes_enabled = TRUE;
 
   return p;
 }