From aabb54e1ee8e2c2ef89e7c5cbbb9a89872e96f67 Mon Sep 17 00:00:00 2001
From: Chris Lattner <sabre@nondot.org>
Date: Tue, 18 Nov 2008 17:18:16 +0000
Subject: [PATCH] don't dereference a null pointer

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@59533 91177308-0d34-0410-b5e6-96231b3b80d8
---
 include/clang/Basic/Diagnostic.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/include/clang/Basic/Diagnostic.h b/include/clang/Basic/Diagnostic.h
index fb1d7a629e..fb3e5953da 100644
--- a/include/clang/Basic/Diagnostic.h
+++ b/include/clang/Basic/Diagnostic.h
@@ -214,6 +214,7 @@ class DiagnosticInfo {
 public:
   DiagnosticInfo(Diagnostic *diagObj, FullSourceLoc loc, unsigned diagID) :
     DiagObj(diagObj), Loc(loc), DiagID(diagID) {
+    if (DiagObj == 0) return;
     assert(DiagObj->NumDiagArgs == -1 &&
            "Multiple diagnostics in flight at once!");
     DiagObj->NumDiagArgs = DiagObj->NumDiagRanges = 0;