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Avoid marking possibly freed stack; #3550 #3612

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This commit is contained in:
Yukihiro "Matz" Matsumoto
2017-05-25 19:55:53 +09:00
parent c53747dbdf
commit de48d95c6d
1 changed files with 5 additions and 2 deletions
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src/gc.c
+5 -2
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@@ -648,8 +648,11 @@ gc_mark_children(mrb_state *mrb, mrb_gc *gc, struct RBasic *obj)
struct REnv *e = (struct REnv*)obj;
mrb_int i, len;
if (MRB_ENV_STACK_SHARED_P(e) && e->cxt.c->fib) {
mrb_gc_mark(mrb, (struct RBasic*)e->cxt.c->fib);
if (MRB_ENV_STACK_SHARED_P(e)) {
if (e->cxt.c->fib) {
mrb_gc_mark(mrb, (struct RBasic*)e->cxt.c->fib);
}
break;
}
len = MRB_ENV_STACK_LEN(e);
for (i=0; i<len; i++) {