From: Benjamin Kramer <benny.kra@googlemail.com>
Date: Sat, 13 Feb 2016 13:42:41 +0000 (+0000)
Subject: Fix use after free.
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=2aa010ad2ec237793d92028b110fca62d6bd1518;p=clang

Fix use after free.

Found by asan.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@260814 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Lex/Pragma.cpp b/lib/Lex/Pragma.cpp
index f2a7e65e45..ff10acc6ad 100644
--- a/lib/Lex/Pragma.cpp
+++ b/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".