From: Fariborz Jahanian <fjahanian@apple.com>
Date: Mon, 18 Feb 2013 17:22:23 +0000 (+0000)
Subject: Prevent crash on multiple user errors (which I cannot reproduce in
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=0dc4ff2209b7b3b5ee479754d12176e43df0cd8e;p=clang

Prevent crash on multiple user errors (which I cannot reproduce in
a small test case). // rdar://13178483.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@175450 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Sema/SemaExpr.cpp b/lib/Sema/SemaExpr.cpp
index 933105e628..86bd7b85cc 100644
--- a/lib/Sema/SemaExpr.cpp
+++ b/lib/Sema/SemaExpr.cpp
@@ -1976,6 +1976,10 @@ Sema::LookupInObjCMethod(LookupResult &Lookup, Scope *S,
                          IdentifierInfo *II, bool AllowBuiltinCreation) {
   SourceLocation Loc = Lookup.getNameLoc();
   ObjCMethodDecl *CurMethod = getCurMethodDecl();
+  
+  // Check for error condition which is already reported.
+  if (!CurMethod)
+    return ExprError();
 
   // There are two cases to handle here.  1) scoped lookup could have failed,
   // in which case we should look for an ivar.  2) scoped lookup could have