From 25bda5ae3caa6fe3f7d36ca2f8ee0d3070bf2f67 Mon Sep 17 00:00:00 2001
From: Dmitry Stogov <dmitry@zend.com>
Date: Thu, 14 Aug 2014 12:01:28 +0400
Subject: [PATCH] Fixed assignment of reference to itself

---
 Zend/zend_execute.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/Zend/zend_execute.c b/Zend/zend_execute.c
index 700ce4b090c..f3e97d71d05 100644
--- a/Zend/zend_execute.c
+++ b/Zend/zend_execute.c
@@ -933,6 +933,9 @@ static inline zval* zend_assign_to_variable(zval *variable_ptr, zval *value TSRM
 						value = Z_REFVAL_P(value);
 					}
 					if (Z_REFCOUNTED_P(value)) {
+						if (UNEXPECTED(variable_ptr == value)) {
+							return variable_ptr;
+						}
 						Z_ADDREF_P(value);
 					}
 				}