[ObjC][Modules] Don't perform property lookup in hidden class extensions

rdar://30603803

llvm-svn: 295903
diff --git a/clang/test/Modules/objc-categories.m b/clang/test/Modules/objc-categories.m
index 42baf35..fcffe3c 100644
--- a/clang/test/Modules/objc-categories.m
+++ b/clang/test/Modules/objc-categories.m
@@ -53,6 +53,9 @@
   p3p = foo.p3_prop; // expected-error{{property 'p3_prop' not found on object of type 'Foo *'}}
   id p4p = p4.p4_prop; // expected-error{{property 'p4_prop' not found on object of type 'id<P4>'}}
   p4p = foo.p4_prop; // expected-error{{property 'p4_prop' not found on object of type 'Foo *'}}
+
+  if (foo.hiddenPropertyFromExtension) { // expected-error {{property 'hiddenPropertyFromExtension' not found on object of type 'Foo *'}}
+  }
 }
 
 @import category_left.sub;
@@ -74,6 +77,7 @@
   id p4p = p4.p4_prop; // expected-error{{property 'p4_prop' not found on object of type 'id<P4>'}}
   p4p = foo.p4_prop; // expected-error{{property 'p4_prop' not found on object of type 'Foo *'; did you mean 'p3_prop'?}}
   // expected-note@Inputs/category_left_sub.h:7{{'p3_prop' declared here}}
+  int hiddenFromExtension = foo.hiddenPropertyFromExtension; // expected-error {{property 'hiddenPropertyFromExtension' not found on object of type 'Foo *'}}
 }
 
 @import category_right.sub;
@@ -92,4 +96,6 @@
   p3p = foo.p3_prop;
   id p4p = p4.p4_prop;
   p4p = foo.p4_prop;
+  if (foo.hiddenPropertyFromExtension) {
+  }
 }