Fix #200: Segmentation fault merging keys of maps containing maps #202
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In `ds_htable_put` when found is true, but value is NULL, the old bucket->value is not cleared out, resulting in a stale value being stored. This means that further operations will keep destroying the stale zval, resulting in a refcount underflow.
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In
ds_htable_putwhen found is true, but value is NULL, the old bucket->value is not cleared out, resulting in a stale value being stored. This means that further operations will keep destroying the stale zval, resulting in a refcount underflow.