From e45bb6aefba8766cbcd86db40acca10de468149f Mon Sep 17 00:00:00 2001
From: Douglas Gregor <dgregor@apple.com>
Date: Wed, 22 Sep 2010 16:33:13 +0000
Subject: [PATCH] Fix a hard-to-reproduce crash-on-invalid, where we weren't
 checking for a valid result from ActOnIdExpression

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@114548 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Sema/SemaExpr.cpp | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/lib/Sema/SemaExpr.cpp b/lib/Sema/SemaExpr.cpp
index 79b27273b5..51ef01fce8 100644
--- a/lib/Sema/SemaExpr.cpp
+++ b/lib/Sema/SemaExpr.cpp
@@ -1401,7 +1401,10 @@ Sema::LookupInObjCMethod(LookupResult &Lookup, Scope *S,
       SelfName.setIdentifier(&II, SourceLocation());
       CXXScopeSpec SelfScopeSpec;
       ExprResult SelfExpr = ActOnIdExpression(S, SelfScopeSpec,
-                                                    SelfName, false, false);
+                                              SelfName, false, false);
+      if (SelfExpr.isInvalid())
+        return ExprError();
+
       MarkDeclarationReferenced(Loc, IV);
       return Owned(new (Context)
                    ObjCIvarRefExpr(IV, IV->getType(), Loc,
-- 
2.40.0