From 342ba4c2440d4c6962782df5fffc29699ff1a9c8 Mon Sep 17 00:00:00 2001
From: Fariborz Jahanian <fjahanian@apple.com>
Date: Thu, 21 Aug 2014 17:06:57 +0000
Subject: [PATCH] Objective-C. Recover from missing interface decl. and
 checking on availability of method declaration instead of crashing. //
 rdar://18059669

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@216191 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Sema/SemaDecl.cpp             |  3 ++-
 test/SemaObjC/attr-availability.m | 27 +++++++++++++++++++++++++++
 2 files changed, 29 insertions(+), 1 deletion(-)

diff --git a/lib/Sema/SemaDecl.cpp b/lib/Sema/SemaDecl.cpp
index b3e92d765f..c8c381518b 100644
--- a/lib/Sema/SemaDecl.cpp
+++ b/lib/Sema/SemaDecl.cpp
@@ -13634,5 +13634,6 @@ AvailabilityResult Sema::getCurContextAvailability() const {
             dyn_cast<ObjCImplementationDecl>(D)) {
     D = ID->getClassInterface();
   }
-  return D->getAvailability();
+  // Recover from user error.
+  return D ? D->getAvailability() : AR_Available;
 }
diff --git a/test/SemaObjC/attr-availability.m b/test/SemaObjC/attr-availability.m
index 7990b1202e..c455bc7acc 100644
--- a/test/SemaObjC/attr-availability.m
+++ b/test/SemaObjC/attr-availability.m
@@ -60,3 +60,30 @@ void f(A *a, B *b) {
 }
 @end
 
+// rdar://18059669
+@class NSMutableArray;
+
+@interface NSDictionary
++ (instancetype)dictionaryWithObjectsAndKeys:(id)firstObject, ... __attribute__((sentinel(0,1)));
+@end
+
+@class NSString;
+
+extern NSString *NSNibTopLevelObjects __attribute__((availability(macosx,introduced=10.0 ,deprecated=10.8,message="" )));
+id NSNibOwner, topNibObjects;
+
+@interface AppDelegate (SIEImport) // expected-error {{cannot find interface declaration for 'AppDelegate'}}
+
+-(void)__attribute__((ibaction))importFromSIE:(id)sender;
+
+@end
+
+@implementation AppDelegate (SIEImport) // expected-error {{cannot find interface declaration for 'AppDelegate'}}
+
+-(void)__attribute__((ibaction))importFromSIE:(id)sender {
+
+ NSMutableArray *topNibObjects;
+ NSDictionary *nibLoadDict = [NSDictionary dictionaryWithObjectsAndKeys:self, NSNibOwner, topNibObjects, NSNibTopLevelObjects, ((void *)0)];
+}
+
+@end
-- 
2.50.1