From 37cf66350cb5a2bb68b0b7c7cca552f7a4867348 Mon Sep 17 00:00:00 2001
From: Douglas Gregor <dgregor@apple.com>
Date: Wed, 6 Oct 2010 21:11:08 +0000
Subject: [PATCH] Fix a double-free error that can occur in rare cases where
 loading of the precompiled preamble (or any PCH file it depends on) fails
 during reparsing.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@115838 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Frontend/ASTUnit.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/lib/Frontend/ASTUnit.cpp b/lib/Frontend/ASTUnit.cpp
index 7b87d3c268..9ae38b134a 100644
--- a/lib/Frontend/ASTUnit.cpp
+++ b/lib/Frontend/ASTUnit.cpp
@@ -798,6 +798,7 @@ error:
     PreprocessorOpts.DisablePCHValidation = true;
     PreprocessorOpts.ImplicitPCHInclude = PriorImplicitPCHInclude;
     delete OverrideMainBuffer;
+    SavedMainFileBuffer = 0;
   }
   
   Clang.takeSourceManager();
-- 
2.40.0