From eea093b47c52297d50764c8a952ca9ed899d6bd7 Mon Sep 17 00:00:00 2001
From: Felipe Pena <felipe@php.net>
Date: Wed, 12 Mar 2008 19:18:42 +0000
Subject: [PATCH] MFB: Fixed bug #42177 (Warning "array_merge_recursive():
 recursion detected" comes again...)

---
 ext/standard/array.c                   |  2 +-
 ext/standard/tests/array/bug42177.phpt | 34 ++++++++++++++++++++++++++
 2 files changed, 35 insertions(+), 1 deletion(-)
 create mode 100644 ext/standard/tests/array/bug42177.phpt

diff --git a/ext/standard/array.c b/ext/standard/array.c
index 9d926ecd1e..6b4db94d8b 100644
--- a/ext/standard/array.c
+++ b/ext/standard/array.c
@@ -2210,7 +2210,7 @@ PHPAPI int php_array_merge(HashTable *dest, HashTable *src, int recursive TSRMLS
 				if (recursive && zend_hash_find(dest, string_key, string_key_len, (void **)&dest_entry) == SUCCESS) {
 					HashTable *thash = HASH_OF(*dest_entry);
 
-					if ((thash && thash->nApplyCount > 1) || (*src_entry == *dest_entry && (Z_REFCOUNT_PP(dest_entry) % 2))) {
+					if ((thash && thash->nApplyCount > 1) || (*src_entry == *dest_entry && Z_ISREF_PP(dest_entry) && (Z_REFCOUNT_PP(dest_entry) % 2))) {
 						php_error_docref(NULL TSRMLS_CC, E_WARNING, "recursion detected");
 						return 0;
 					}
diff --git a/ext/standard/tests/array/bug42177.phpt b/ext/standard/tests/array/bug42177.phpt
new file mode 100644
index 0000000000..5678ca3cac
--- /dev/null
+++ b/ext/standard/tests/array/bug42177.phpt
@@ -0,0 +1,34 @@
+--TEST--
+Bug #42177 (Warning "array_merge_recursive(): recursion detected" comes again...)
+--FILE--
+<?php
+
+$a1 = array( 'key1' => 1, 'key3' => 2 );
+$a2 = array();
+$a1 = array_merge_recursive( $a1, $a2 );
+$a1 = array_merge_recursive( $a1, $a2 );
+unset( $a1, $a2 );
+
+$a1 = array();
+$a2 = array( 'key1' => 1, 'key3' => 2 );
+$a1 = array_merge_recursive( $a1, $a2 );
+$a1 = array_merge_recursive( $a1, $a2 );
+unset( $a1, $a2 );
+
+$a1 = array();
+$a2 = array( 'key1' => &$a1 );
+$a1 = array_merge_recursive( $a1, $a2 );
+$a1 = array_merge_recursive( $a1, $a2 );
+unset( $a1, $a2 );
+
+$x = 'foo';
+$y =& $x;
+$a1 = array($x, $y, $x, $y);
+$a2 = array( 'key1' => $a1, $x, $y );
+$a1 = array_merge_recursive( $a1, $a2 );
+$a1 = array_merge_recursive( $a1, $a2 );
+unset( $a1, $a2 );
+
+?>
+--EXPECTF--
+Warning: array_merge_recursive(): recursion detected in %s on line 18
-- 
2.40.0