From 95658030bce151c1ddaf2ef353b424191099b813 Mon Sep 17 00:00:00 2001
From: Alexander Mai <amai@users.sf.net>
Date: Sun, 9 Aug 2015 07:49:34 +0200
Subject: [PATCH] Avoid UB in Tokenizer::printDebugOutput in case of empty
 tokenlist (see #6913)

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

diff --git a/lib/tokenize.cpp b/lib/tokenize.cpp
index 9adc5214d..c64273fbb 100644
--- a/lib/tokenize.cpp
+++ b/lib/tokenize.cpp
@@ -3799,7 +3799,7 @@ void Tokenizer::printDebugOutput(unsigned int simplification) const
     const bool debug = (simplification != 1U && _settings->debug) ||
                        (simplification != 2U && _settings->debugnormal);
 
-    if (debug) {
+    if (debug && list.front()) {
         list.front()->printOut(0, list.getFiles());
 
         if (_settings->_xml)