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Make String#replace to check equality before modifying flags.

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ref #3588
This commit is contained in:
Yukihiro "Matz" Matsumoto
2017-04-06 08:25:25 +09:00
parent a7b0ab3769
commit 5e79bc9377
1 changed files with 1 additions and 1 deletions
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src/string.c
+1 -1
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@@ -520,9 +520,9 @@ str_replace(mrb_state *mrb, struct RString *s1, struct RString *s2)
long len;
check_frozen(mrb, s1);
if (s1 == s2) return mrb_obj_value(s1);
s1->flags &= ~MRB_STR_NO_UTF;
s1->flags |= s2->flags&MRB_STR_NO_UTF;
if (s1 == s2) return mrb_obj_value(s1);
len = RSTR_LEN(s2);
if (RSTR_SHARED_P(s1)) {
str_decref(mrb, s1->as.heap.aux.shared);