From 62810af7f359931ab49fe9fc0f21974b638a7fea Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Daniel=20Marjam=C3=A4ki?= <daniel.marjamaki@gmail.com>
Date: Wed, 2 Dec 2020 23:06:11 +0100
Subject: [PATCH] Tokenizer: Avoid null pointer dereference in garbage code

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

diff --git a/lib/tokenize.cpp b/lib/tokenize.cpp
index 2729290b8..d3a3e575a 100644
--- a/lib/tokenize.cpp
+++ b/lib/tokenize.cpp
@@ -5185,7 +5185,7 @@ void Tokenizer::splitTemplateRightAngleBrackets(bool check)
             vars.insert(tok->strAt(2));
 
         // Ticket #6181: normalize C++11 template parameter list closing syntax
-        if (tok->str() == "<" && mTemplateSimplifier->templateParameters(tok) && vars.find(tok->previous()->str()) == vars.end()) {
+        if (tok->previous() && tok->str() == "<" && mTemplateSimplifier->templateParameters(tok) && vars.find(tok->previous()->str()) == vars.end()) {
             Token *endTok = tok->findClosingBracket();
             if (check) {
                 if (Token::Match(endTok, ">>|>>="))