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Check arena_idx before accessing; fix #3934

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This commit is contained in:
Yukihiro "Matz" Matsumoto
2018-01-25 12:30:10 +09:00
parent 0e93f1ff12
commit d895861a30
1 changed files with 2 additions and 1 deletions
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src/error.c
+2 -1
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@@ -229,7 +229,8 @@ mrb_exc_set(mrb_state *mrb, mrb_value exc)
}
else {
mrb->exc = mrb_obj_ptr(exc);
if ((struct RBasic*)mrb->exc == mrb->gc.arena[mrb->gc.arena_idx-1]) {
if (mrb->gc.arena_idx > 0 &&
(struct RBasic*)mrb->exc == mrb->gc.arena[mrb->gc.arena_idx-1]) {
mrb->gc.arena_idx--;
}
if (!mrb->gc.out_of_memory) {