--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/clang/test/Sema/attr-osobject.mm	Thu Feb 13 15:10:13 2020 +0900
@@ -0,0 +1,15 @@
+// RUN: %clang_cc1 -fsyntax-only -verify -fblocks %s
+
+struct S {};
+
+@interface I
+  @property (readonly) S* prop __attribute__((os_returns_retained));
+  - (S*) generateS __attribute__((os_returns_retained));
+  - (void) takeS:(S*) __attribute__((os_consumed)) s;
+@end
+
+typedef __attribute__((os_returns_retained)) id (^blockType)(); // expected-warning{{'os_returns_retained' attribute only applies to functions, Objective-C methods, Objective-C properties, and parameters}}
+
+__auto_type b = ^ id (id filter)  __attribute__((os_returns_retained))  { // expected-warning{{'os_returns_retained' attribute only applies to functions, Objective-C methods, Objective-C properties, and parameters}}
+  return filter;
+};