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OP_ASGN vsp may be negative

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reported by https://gist.github.com/miura1729/53fbd8af889c289a79108e38635b2378
fix proposed by @miura1729 in
https://github.com/miura1729/mruby/commit/b1b7933f7aa950cfb747b06327a0d0340f3e4ff8
This commit is contained in:
Yukihiro "Matz" Matsumoto
2016-07-25 11:34:55 +09:00
parent 417092360d
commit 34ac707ea3
1 changed files with 3 additions and 3 deletions
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mrbgems/mruby-compiler/core/codegen.c
+3 -3
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@@ -1785,7 +1785,7 @@ codegen(codegen_scope *s, node *tree, int val)
int pos;
pop();
if (val) {
if (val && vsp >= 0) {
genop(s, MKOP_AB(OP_MOVE, vsp, cursp()));
pos = genop(s, MKOP_AsBx(name[0]=='|'?OP_JMPIF:OP_JMPNOT, cursp(), 0));
}
@@ -1794,7 +1794,7 @@ codegen(codegen_scope *s, node *tree, int val)
}
codegen(s, tree->cdr->cdr->car, VAL);
pop();
if (val) {
if (val && vsp >= 0) {
genop(s, MKOP_AB(OP_MOVE, vsp, cursp()));
}
if ((intptr_t)tree->car->car == NODE_CALL) {
@@ -1855,7 +1855,7 @@ codegen(codegen_scope *s, node *tree, int val)
gen_assignment(s, tree->car, cursp(), val);
}
else {
if (val) {
if (val && vsp >= 0) {
genop(s, MKOP_AB(OP_MOVE, vsp, cursp()));
}
if (callargs == CALL_MAXARGS) {