From: Chris Lattner <sabre@nondot.org>
Date: Fri, 11 Apr 2008 16:20:41 +0000 (+0000)
Subject: don't read off the front of the buffer.  Thanks to Sam for pointing this out.
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=8fa3078cfe8b25fe8450e7d31dc5500b5888b95e;p=clang

don't read off the front of the buffer.  Thanks to Sam for pointing this out.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@49535 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Lex/Lexer.cpp b/lib/Lex/Lexer.cpp
index 98bbb38630..e3daf31267 100644
--- a/lib/Lex/Lexer.cpp
+++ b/lib/Lex/Lexer.cpp
@@ -1142,7 +1142,7 @@ bool Lexer::LexEndOfFile(Token &Result, const char *CurPtr) {
   }
   
   // If the file was empty or didn't end in a newline, issue a pedwarn.
-  if (CurPtr[-1] != '\n' && CurPtr[-1] != '\r')
+  if (CurPtr == BufferStart || (CurPtr[-1] != '\n' && CurPtr[-1] != '\r'))
     Diag(BufferEnd, diag::ext_no_newline_eof);
   
   BufferPtr = CurPtr;