From: Chris Lattner <sabre@nondot.org>
Date: Thu, 18 Jun 2009 05:55:53 +0000 (+0000)
Subject: Fix a crash that can occur when a #pragma handler eats to the end of the
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=027cff63321262a5a85a402c39aac06ee66c745d;p=clang

Fix a crash that can occur when a #pragma handler eats to the end of the
line, and when the pragma is at the end of a file.  In this case, the last
token consumed could pop the lexer, invalidating CurPPLexer.  Thanks to
Peter Thoman for pointing it out.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@73689 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Lex/Pragma.cpp b/lib/Lex/Pragma.cpp
index 9776c2cfbd..3227d1cf09 100644
--- a/lib/Lex/Pragma.cpp
+++ b/lib/Lex/Pragma.cpp
@@ -93,7 +93,7 @@ void Preprocessor::HandlePragmaDirective() {
   PragmaHandlers->HandlePragma(*this, Tok);
   
   // If the pragma handler didn't read the rest of the line, consume it now.
-  if (CurPPLexer->ParsingPreprocessorDirective)
+  if (CurPPLexer && CurPPLexer->ParsingPreprocessorDirective)
     DiscardUntilEndOfDirective();
 }