From fd2571b27a1b953315b439d82ccb40a263d249f2 Mon Sep 17 00:00:00 2001
From: Rhodri James <rhodri@kynesim.co.uk>
Date: Tue, 25 Apr 2017 18:30:29 +0100
Subject: [PATCH] Validate parser parameter to XML_GetCurrentByteCount

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

diff --git a/expat/lib/xmlparse.c b/expat/lib/xmlparse.c
index c3df6ce6..571918d4 100644
--- a/expat/lib/xmlparse.c
+++ b/expat/lib/xmlparse.c
@@ -2034,6 +2034,8 @@ XML_GetCurrentByteIndex(XML_Parser parser)
 int XMLCALL
 XML_GetCurrentByteCount(XML_Parser parser)
 {
+  if (parser == NULL)
+    return 0;
   if (eventEndPtr && eventPtr)
     return (int)(eventEndPtr - eventPtr);
   return 0;