Merge branch 'PHP-7.4'

* PHP-7.4:
  Fixed bug #79477

Author: nikic

Zend/tests/bug79477.phpt

@@ -0,0 +1,20 @@
+--TEST--
+Bug #79477: casting object into array creates references
+--FILE--
+<?php
+
+class Test {
+	public $prop = 'default value';
+}
+
+$obj = new Test;
+$obj->{1} = null;
+
+$arr = (array) $obj;
+$arr['prop'] = 'new value';
+
+echo $obj->prop, "\n";
+
+?>
+--EXPECT--
+default value

Zend/zend_hash.c

@@ -2806,7 +2806,7 @@ ZEND_API HashTable* ZEND_FASTCALL zend_proptable_to_symtable(HashTable *ht, zend
 	{
 		HashTable *new_ht = zend_new_array(zend_hash_num_elements(ht));
 
-		ZEND_HASH_FOREACH_KEY_VAL(ht, num_key, str_key, zv) {
+		ZEND_HASH_FOREACH_KEY_VAL_IND(ht, num_key, str_key, zv) {
 			do {
 				if (Z_OPT_REFCOUNTED_P(zv)) {
 					if (Z_ISREF_P(zv) && Z_REFCOUNT_P(zv) == 1) {