From 7903276f4c18fcfda06c02785f0b4201421f9c7c Mon Sep 17 00:00:00 2001
From: Xinchen Hui <laruence@gmail.com>
Date: Tue, 12 Jul 2016 12:14:45 +0800
Subject: backport to 5.6 (we should not unset the default value)

---
 Zend/zend_exceptions.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'Zend/zend_exceptions.c')

diff --git a/Zend/zend_exceptions.c b/Zend/zend_exceptions.c
index 66476a1517..fda4d21e03 100644
--- a/Zend/zend_exceptions.c
+++ b/Zend/zend_exceptions.c
@@ -230,7 +230,7 @@ ZEND_METHOD(exception, __construct)
    Exception unserialize checks */
 #define CHECK_EXC_TYPE(name, type) \
 	value = zend_read_property(default_exception_ce, object, name, sizeof(name)-1, 0 TSRMLS_CC); \
-	if(value && Z_TYPE_P(value) != type) { \
+	if (value && Z_TYPE_P(value) != IS_NULL && Z_TYPE_P(value) != type) { \
 		zval *tmp; \
 		MAKE_STD_ZVAL(tmp); \
 		ZVAL_STRINGL(tmp, name, sizeof(name)-1, 1); \
-- 
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