From 69663666c13050ecb9b31867f9de61aa8d81ce55 Mon Sep 17 00:00:00 2001
From: Felipe Pena <felipe@php.net>
Date: Wed, 12 Mar 2008 19:13:00 +0000
Subject: [PATCH] Fixed bug #42177 (Warning "array_merge_recursive(): recursion
 detected" comes again...)

---
 NEWS                                   |  2 ++
 ext/standard/array.c                   |  2 +-
 ext/standard/tests/array/bug42177.phpt | 34 ++++++++++++++++++++++++++
 3 files changed, 37 insertions(+), 1 deletion(-)
 create mode 100644 ext/standard/tests/array/bug42177.phpt

diff --git a/NEWS b/NEWS
index 924aa482e7..da2e4996b4 100644
--- a/NEWS
+++ b/NEWS
@@ -4,6 +4,8 @@ PHP                                                                        NEWS
 - Fixed bug #44394 (Last two bytes missing from output). (Felipe)
 - Fixed bug #44388 (Crash inside exif_read_data() on invalid images) (Ilia)
 - Fixed bug #44373 (PDO_OCI extension compile failed). (Felipe)
+- Fixed bug #42177 (Warning "array_merge_recursive(): recursion detected" comes 
+  again...). (Felipe)
 
 06 Mar 2008, PHP 5.2.6RC2
 - Fixed bug #44333 (SEGFAULT when using mysql_pconnect() with client_flags).
diff --git a/ext/standard/array.c b/ext/standard/array.c
index 2dbfa0e035..664ee6ccdc 100644
--- a/ext/standard/array.c
+++ b/ext/standard/array.c
@@ -2305,7 +2305,7 @@ 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 && ((*dest_entry)->refcount % 2))) {
+					if ((thash && thash->nApplyCount > 1) || (*src_entry == *dest_entry && (*dest_entry)->is_ref && ((*dest_entry)->refcount % 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