From f66e7fb3796072dfcb61e96e97e75b6d890c0223 Mon Sep 17 00:00:00 2001
From: amai2012 <amai@users.sf.net>
Date: Mon, 28 Nov 2016 18:19:19 +0100
Subject: [PATCH] #7833 UB: member call on null pointer when --dumping
 configuration with unknown value

---
 lib/tokenize.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/lib/tokenize.cpp b/lib/tokenize.cpp
index d4ae4028e..4d674bb8f 100644
--- a/lib/tokenize.cpp
+++ b/lib/tokenize.cpp
@@ -3898,7 +3898,8 @@ void Tokenizer::dump(std::ostream &out) const
     out << "  </tokenlist>" << std::endl;
 
     _symbolDatabase->printXml(out);
-    list.front()->printValueFlow(true, out);
+    if (list.front())
+        list.front()->printValueFlow(true, out);
 }
 
 void Tokenizer::removeMacrosInGlobalScope()