Fixed segfault while OOM in pack_to_hash

Author: laruence

Zend/zend_hash.c

@@ -191,14 +191,15 @@ ZEND_API void ZEND_FASTCALL zend_hash_real_init(HashTable *ht, zend_bool packed)
 
 ZEND_API void ZEND_FASTCALL zend_hash_packed_to_hash(HashTable *ht)
 {
-	void *old_data = HT_GET_DATA_ADDR(ht);
+	void *new_data, *old_data = HT_GET_DATA_ADDR(ht);
 	Bucket *old_buckets = ht->arData;
 
 	HT_ASSERT(GC_REFCOUNT(ht) == 1);
 	HANDLE_BLOCK_INTERRUPTIONS();
 	ht->u.flags &= ~HASH_FLAG_PACKED;
+	new_data = pemalloc(HT_SIZE(ht), (ht)->u.flags & HASH_FLAG_PERSISTENT);
 	ht->nTableMask = -ht->nTableSize;
-	HT_SET_DATA_ADDR(ht, pemalloc(HT_SIZE(ht), (ht)->u.flags & HASH_FLAG_PERSISTENT));
+	HT_SET_DATA_ADDR(ht, new_data);
 	memcpy(ht->arData, old_buckets, sizeof(Bucket) * ht->nNumUsed);
 	pefree(old_data, (ht)->u.flags & HASH_FLAG_PERSISTENT);
 	zend_hash_rehash(ht);