From 78713d86faeaaabb8aeb1683353e791defd3a3bf Mon Sep 17 00:00:00 2001
From: Douglas Gregor <dgregor@apple.com>
Date: Fri, 9 Apr 2010 21:30:38 +0000
Subject: [PATCH] When upgrading an Objective-C class from a forward
 declaration to a full-fledged @interface, be sure that the declaration has
 the right lexical context. <rdar://problem/7827709>

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@100903 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Sema/SemaDeclObjC.cpp       | 1 +
 test/SemaObjCXX/linkage-spec.mm | 8 ++++++++
 2 files changed, 9 insertions(+)

diff --git a/lib/Sema/SemaDeclObjC.cpp b/lib/Sema/SemaDeclObjC.cpp
index 7e5e40c562..eb3f4222b6 100644
--- a/lib/Sema/SemaDeclObjC.cpp
+++ b/lib/Sema/SemaDeclObjC.cpp
@@ -98,6 +98,7 @@ ActOnStartClassInterface(SourceLocation AtInterfaceLoc,
       // Since this ObjCInterfaceDecl was created by a forward declaration,
       // we now add it to the DeclContext since it wasn't added before
       // (see ActOnForwardClassDeclaration).
+      IDecl->setLexicalDeclContext(CurContext);
       CurContext->addDecl(IDecl);
       
       if (AttrList)
diff --git a/test/SemaObjCXX/linkage-spec.mm b/test/SemaObjCXX/linkage-spec.mm
index b4e809eee1..1454e6a678 100644
--- a/test/SemaObjCXX/linkage-spec.mm
+++ b/test/SemaObjCXX/linkage-spec.mm
@@ -2,3 +2,11 @@
 extern "C" {
 @class Protocol;
 }
+
+// <rdar://problem/7827709>
+extern "C" {
+@class I;
+}
+
+@interface I
+@end
-- 
2.40.0