From: Chris Lattner <sabre@nondot.org>
Date: Tue, 31 Jan 2012 18:53:44 +0000 (+0000)
Subject: fix a crash on:
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=2831092e8063c01aa307bc62ff5e9eb8db2ceedc;p=clang

fix a crash on:

__has_builtin

in an empty file, as we were overwriting the EOF token.  Overwriting an arbitrary token
never seems like a good idea in the error case.  This fixes a bug reported on the GCC
list :)


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@149397 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Lex/PPMacroExpansion.cpp b/lib/Lex/PPMacroExpansion.cpp
index 035272279d..d8cd440391 100644
--- a/lib/Lex/PPMacroExpansion.cpp
+++ b/lib/Lex/PPMacroExpansion.cpp
@@ -1032,7 +1032,8 @@ void Preprocessor::ExpandBuiltinMacro(Token &Tok) {
     }
 
     OS << (int)Value;
-    Tok.setKind(tok::numeric_constant);
+    if (IsValid)
+      Tok.setKind(tok::numeric_constant);
   } else if (II == Ident__has_include ||
              II == Ident__has_include_next) {
     // The argument to these two builtins should be a parenthesized