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Merge pull request #2947 from kazuho/kazuho/freeze-hash-key

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freeze the hash keys (fixes #2945)
This commit is contained in:
Yukihiro "Matz" Matsumoto
2015-09-10 22:58:01 +09:00
parent 1cbbb7e11c 8256d77c7f
commit 543ac88eae
1 changed files with 5 additions and 4 deletions
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src/hash.c
+5 -4
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@@ -104,10 +104,11 @@ static void mrb_hash_modify(mrb_state *mrb, mrb_value hash);
static inline mrb_value
mrb_hash_ht_key(mrb_state *mrb, mrb_value key)
{
if (mrb_string_p(key))
return mrb_str_dup(mrb, key);
else
return key;
if (mrb_string_p(key) && !RSTR_FROZEN_P(mrb_str_ptr(key))) {
key = mrb_str_dup(mrb, key);
RSTR_SET_FROZEN_FLAG(mrb_str_ptr(key));
}
return key;
}
#define KEY(key) mrb_hash_ht_key(mrb, key)