From 581a4c7ccfb5b06b4df41ab2eeae926f45449e0f Mon Sep 17 00:00:00 2001
From: Rhodri James <rhodri@kynesim.co.uk>
Date: Tue, 25 Apr 2017 18:46:51 +0100
Subject: [PATCH] Validate parser parameter to XML_MemFree

---
 expat/lib/xmlparse.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/expat/lib/xmlparse.c b/expat/lib/xmlparse.c
index 95e48fc1..7c91d87a 100644
--- a/expat/lib/xmlparse.c
+++ b/expat/lib/xmlparse.c
@@ -2106,7 +2106,8 @@ XML_MemRealloc(XML_Parser parser, void *ptr, size_t size)
 void XMLCALL
 XML_MemFree(XML_Parser parser, void *ptr)
 {
-  FREE(ptr);
+  if (parser != NULL)
+    FREE(ptr);
 }
 
 void XMLCALL