In MeasureTokenLength, the FileLoc supplied to the lexer must point to the start of the buffer, or we risk overflow.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@115117 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Lex/Lexer.cpp b/lib/Lex/Lexer.cpp
index 917829b..519dd82 100644
--- a/lib/Lex/Lexer.cpp
+++ b/lib/Lex/Lexer.cpp
@@ -242,7 +242,8 @@
return 0;
// Create a lexer starting at the beginning of this token.
- Lexer TheLexer(Loc, LangOpts, Buffer.begin(), StrData, Buffer.end());
+ Lexer TheLexer(SM.getLocForStartOfFile(LocInfo.first), LangOpts,
+ Buffer.begin(), StrData, Buffer.end());
TheLexer.SetCommentRetentionState(true);
Token TheTok;
TheLexer.LexFromRawLexer(TheTok);