From 2193e23cd72731c0d46a4ca8f09efe88b1c5f7b2 Mon Sep 17 00:00:00 2001
From: Benjamin Kramer <benny.kra@googlemail.com>
Date: Sat, 13 Feb 2016 13:42:41 +0000
Subject: Fix use after free.

Found by asan.

llvm-svn: 260814
---
 clang/lib/Lex/Pragma.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'clang/lib/Lex/Pragma.cpp')

diff --git a/clang/lib/Lex/Pragma.cpp b/clang/lib/Lex/Pragma.cpp
index f2a7e65e450..ff10acc6adc 100644
--- a/clang/lib/Lex/Pragma.cpp
+++ b/clang/lib/Lex/Pragma.cpp
@@ -1026,7 +1026,7 @@ public:
 
     diag::Flavor Flavor = WarningName[1] == 'W' ? diag::Flavor::WarningOrError
                                                 : diag::Flavor::Remark;
-    StringRef Group = WarningName.substr(2);
+    StringRef Group = StringRef(WarningName).substr(2);
     bool unknownDiag = false;
     if (Group == "everything") {
       // Special handling for pragma clang diagnostic ... "-Weverything".
-- 
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