Validate parser parameter to XML_SetNotStandaloneHandler

diff --git a/expat/lib/xmlparse.c b/expat/lib/xmlparse.c
index c45afaa24b18d447769a0df4ee8225da07155d70..9cd124ba20278fb26bff0d978a185409b2c6049c 100644 (file)
--- a/expat/lib/xmlparse.c
+++ b/expat/lib/xmlparse.c
@@ -1541,7 +1541,8 @@ void XMLCALL
 XML_SetNotStandaloneHandler(XML_Parser parser,
                             XML_NotStandaloneHandler handler)
 {
-  notStandaloneHandler = handler;
+  if (parser != NULL)
+    notStandaloneHandler = handler;
 }
 
 void XMLCALL