commit 9fe0828d8fc56103ada2a68f0f8d13fe56d449e2
author Chris Lattner <sabre@nondot.org> Fri Apr 11 16:20:41 2008 +0000
committer Chris Lattner <sabre@nondot.org> Fri Apr 11 16:20:41 2008 +0000
tree 40b00f3f6179706b62fa2c11800dd930614318fa
parent 274366f8e637c55be456dfc7bb4ea54fe5e5af97

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

lib/Lex/Lexer.cpp

diff --git a/lib/Lex/Lexer.cpp b/lib/Lex/Lexer.cpp
index 98bbb38..e3daf31 100644
--- a/lib/Lex/Lexer.cpp
+++ b/lib/Lex/Lexer.cpp
@@ -1142,7 +1142,7 @@
   }
   
   // 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;