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Merge pull request #3940 from take-cheeze/fix_proc_ctx_access

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Fix possible memory access error.
This commit is contained in:
Yukihiro "Matz" Matsumoto
2018-02-02 14:16:10 +09:00
committed by GitHub
parent 6f1e1777cb 3c18ec27e9
commit cafe6ce4f4
1 changed files with 1 additions and 1 deletions
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src/gc.c
+1 -1
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@@ -658,7 +658,7 @@ 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->fib) {
if (MRB_ENV_STACK_SHARED_P(e) && e->cxt && e->cxt->fib) {
mrb_gc_mark(mrb, (struct RBasic*)e->cxt->fib);
}
len = MRB_ENV_STACK_LEN(e);