From eca1d097e199c483b38a02026b8c475bf075f542 Mon Sep 17 00:00:00 2001
From: Rhodri James <rhodri@kynesim.co.uk>
Date: Tue, 25 Apr 2017 17:22:19 +0100
Subject: [PATCH] Validate parser parameter to XML_SetDefaultHandlerExpand

---
 expat/lib/xmlparse.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/expat/lib/xmlparse.c b/expat/lib/xmlparse.c
index b91191e6..2de26ba2 100644
--- a/expat/lib/xmlparse.c
+++ b/expat/lib/xmlparse.c
@@ -1465,6 +1465,8 @@ void XMLCALL
 XML_SetDefaultHandlerExpand(XML_Parser parser,
                             XML_DefaultHandler handler)
 {
+  if (parser == NULL)
+    return;
   defaultHandler = handler;
   defaultExpandInternalEntities = XML_TRUE;
 }
-- 
2.40.0