From 27940d2fb346325d6001a7661e4ada099cd8e59c Mon Sep 17 00:00:00 2001
From: John McCall <rjmccall@apple.com>
Date: Fri, 30 Jul 2010 05:17:22 +0000
Subject: [PATCH] If a TST_typename has a null type, mark the declarator
 invalid.  Prevents some downstream crashes, among them
 rdar://problem/8229840.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@109850 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Sema/SemaType.cpp | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/lib/Sema/SemaType.cpp b/lib/Sema/SemaType.cpp
index d3715aad97..feff524143 100644
--- a/lib/Sema/SemaType.cpp
+++ b/lib/Sema/SemaType.cpp
@@ -298,8 +298,10 @@ static QualType ConvertDeclSpecToType(Sema &TheSema,
            DS.getTypeSpecSign() == 0 &&
            "Can't handle qualifiers on typedef names yet!");
     Result = TheSema.GetTypeFromParser(DS.getTypeRep());
-
-    if (DeclSpec::ProtocolQualifierListTy PQ = DS.getProtocolQualifiers()) {
+    if (Result.isNull())
+      TheDeclarator.setInvalidType(true);
+    else if (DeclSpec::ProtocolQualifierListTy PQ
+               = DS.getProtocolQualifiers()) {
       if (const ObjCObjectType *ObjT = Result->getAs<ObjCObjectType>()) {
         // Silently drop any existing protocol qualifiers.
         // TODO: determine whether that's the right thing to do.
-- 
2.50.1