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-rw-r--r--hash.c6
1 files changed, 5 insertions, 1 deletions
diff --git a/hash.c b/hash.c
index fdecb1edad..d6d3752fb7 100644
--- a/hash.c
+++ b/hash.c
@@ -3268,8 +3268,8 @@ rb_hash_transform_keys_bang(int argc, VALUE *argv, VALUE hash)
rb_hash_modify_check(hash);
if (!RHASH_TABLE_EMPTY_P(hash)) {
long i;
+ VALUE new_keys = hash_alloc(0);
VALUE pairs = rb_hash_flatten(0, NULL, hash);
- rb_hash_clear(hash);
for (i = 0; i < RARRAY_LEN(pairs); i += 2) {
VALUE key = RARRAY_AREF(pairs, i), new_key, val;
@@ -3286,7 +3286,11 @@ rb_hash_transform_keys_bang(int argc, VALUE *argv, VALUE hash)
new_key = key;
}
val = RARRAY_AREF(pairs, i+1);
+ if (!hash_stlike_lookup(new_keys, key, NULL)) {
+ rb_hash_stlike_delete(hash, &key, NULL);
+ }
rb_hash_aset(hash, new_key, val);
+ rb_hash_aset(new_keys, new_key, Qnil);
}
}
return hash;