Fix <rdar://problem/6150376> [sema] crash on invalid message send.

The core fix in Sema::ActOnClassMessage(). All the other changes have to do with passing down the SourceLocation for the receiver (to properly position the cursor when producing an error diagnostic).



git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@59639 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Sema/Sema.h b/lib/Sema/Sema.h
index c60fd35..b10a98f 100644
--- a/lib/Sema/Sema.h
+++ b/lib/Sema/Sema.h
@@ -1050,7 +1050,7 @@
   virtual ExprResult ActOnClassMessage(
     Scope *S,
     IdentifierInfo *receivingClassName, Selector Sel,
-    SourceLocation lbrac, SourceLocation rbrac, 
+    SourceLocation lbrac, SourceLocation receiverLoc, SourceLocation rbrac, 
     ExprTy **ArgExprs, unsigned NumArgs);
 
   // ActOnInstanceMessage - used for both unary and keyword messages.