From c934de67e0c6f2b8000ecdfe66ecac37a5b78006 Mon Sep 17 00:00:00 2001
From: Fariborz Jahanian <fjahanian@apple.com>
Date: Fri, 3 Feb 2012 01:02:44 +0000
Subject: objc: Issue diagnostic when receiver type is a forward class
 declaration and it is treated as of 'id' type resulting in multiple method
 lookup. // rdar://10686120

llvm-svn: 149653
---
 clang/lib/Sema/SemaExprObjC.cpp | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

(limited to 'clang/lib/Sema/SemaExprObjC.cpp')

diff --git a/clang/lib/Sema/SemaExprObjC.cpp b/clang/lib/Sema/SemaExprObjC.cpp
index 82e8171d666..7e2180fe0ef 100644
--- a/clang/lib/Sema/SemaExprObjC.cpp
+++ b/clang/lib/Sema/SemaExprObjC.cpp
@@ -1380,11 +1380,15 @@ ExprResult Sema::BuildInstanceMessage(Expr *Receiver,
                 ? PDiag(diag::err_arc_receiver_forward_instance)
                     << (Receiver ? Receiver->getSourceRange() 
                                  : SourceRange(SuperLoc))
-                : PDiag())) {
+                : PDiag(diag::warn_receiver_forward_instance)
+                    << (Receiver ? Receiver->getSourceRange() 
+                                 : SourceRange(SuperLoc)))) {
           if (getLangOptions().ObjCAutoRefCount)
             return ExprError();
           
           forwardClass = OCIType->getInterfaceDecl();
+          Diag(Receiver ? Receiver->getLocStart() 
+                        : SuperLoc, diag::note_receiver_is_id);
           Method = 0;
         } else {
           Method = ClassDecl->lookupInstanceMethod(Sel);
-- 
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