- Fixed missing NULL check in SimpleXMLElement::xpath()

ext/simplexml/simplexml.c

@@ -1270,6 +1270,9 @@ SXE_METHOD(xpath)
 	if (!sxe->node) {
 		php_libxml_increment_node_ptr((php_libxml_node_object *)sxe, xmlDocGetRootElement((xmlDocPtr) sxe->document->ptr), NULL TSRMLS_CC);
 	}
+	if (!sxe->node) {
+		RETURN_FALSE;
+	}
 
 	nodeptr = php_sxe_get_first_node(sxe, sxe->node->node TSRMLS_CC);
 

ext/simplexml/tests/SimpleXMLElement_xpath.phpt

@@ -0,0 +1,8 @@
+--TEST--
+Testing xpath() with invalid XML
+--FILE--
+<?php
+$xml = @simplexml_load_string("XXXXXXX^",$x,0x6000000000000001);
+var_dump($xml->xpath("BBBB"));
+--EXPECT--
+bool(false)