From 5cb8fabb7d75d90dc6d14b3ed0e16ea174598187 Mon Sep 17 00:00:00 2001
From: Andi Gutmans <andi@php.net>
Date: Sun, 24 Nov 2002 20:15:56 +0000
Subject: [PATCH] - Fix crash

---
 Zend/zend.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/Zend/zend.c b/Zend/zend.c
index 80c1b824a4..17d2cda0c5 100644
--- a/Zend/zend.c
+++ b/Zend/zend.c
@@ -813,7 +813,9 @@ ZEND_API void zend_error(int type, const char *format, ...)
 			orig_user_error_handler = EG(user_error_handler);
 			EG(user_error_handler) = NULL;
 			if (call_user_function_ex(CG(function_table), NULL, orig_user_error_handler, &retval, 5, params, 1, NULL TSRMLS_CC)==SUCCESS) {
-				zval_ptr_dtor(&retval);
+				if (retval) {
+					zval_ptr_dtor(&retval);
+				}
 			} else {
 				/* The user error handler failed, use built-in error handler */
 				zend_error_cb(type, error_filename, error_lineno, format, args);
-- 
2.40.0