From a1239f65af457fab06dc81279f05422c82dd7210 Mon Sep 17 00:00:00 2001
From: Remi Gacogne <remi.gacogne@powerdns.com>
Date: Fri, 22 Apr 2016 16:56:46 +0200
Subject: [PATCH] Fix null pointer dereference on parsing error in
 ZoneParserTNG

For example when parsing an unmatched '('
---
 pdns/zoneparser-tng.cc | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/pdns/zoneparser-tng.cc b/pdns/zoneparser-tng.cc
index 1e8c3ccb4b..0de245dcc8 100644
--- a/pdns/zoneparser-tng.cc
+++ b/pdns/zoneparser-tng.cc
@@ -250,6 +250,9 @@ string ZoneParserTNG::getLineOfFile()
   if (d_zonedata.size() > 0)
     return "on line "+std::to_string(std::distance(d_zonedata.begin(), d_zonedataline))+" of given string";
 
+  if (d_filestates.empty())
+    return "";
+
   return "on line "+std::to_string(d_filestates.top().d_lineno)+" of file '"+d_filestates.top().d_filename+"'";
 }
 
-- 
2.47.2