From c2a194ead022de1675de2c85eb1a389f7b7ac837 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Daniel=20Marjam=C3=A4ki?= <daniel@daniel-laptop.(none)>
Date: Tue, 4 Jan 2011 18:34:51 +0100
Subject: [PATCH] Fixed #2393 (Token::Match called with varid 0)

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

diff --git a/lib/checkbufferoverrun.cpp b/lib/checkbufferoverrun.cpp
index 85292eef8..dc4ff9d63 100644
--- a/lib/checkbufferoverrun.cpp
+++ b/lib/checkbufferoverrun.cpp
@@ -925,7 +925,7 @@ void CheckBufferOverrun::checkScope(const Token *tok, const std::vector<std::str
         }
 
         // undefined behaviour: result of pointer arithmetic is out of bounds
-        if (Token::Match(tok, "= %varid% + %num% ;", varid))
+        if (varid && Token::Match(tok, "= %varid% + %num% ;", varid))
         {
             const MathLib::bigint index = MathLib::toLongNumber(tok->strAt(3));
             if (index > size && _settings->_checkCodingStyle)