--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/clang/test/SemaObjC/opaque-is-access.m	Thu Feb 13 15:10:13 2020 +0900
@@ -0,0 +1,23 @@
+// RUN: %clang -target x86_64-apple-darwin -arch arm64 -mios-version-min=7 -fsyntax-only %s -Xclang -verify
+// RUN: %clang -target x86_64-apple-darwin -arch x86_64 -mios-simulator-version-min=7 -fsyntax-only %s -Xclang -verify
+// rdar://10709102
+
+typedef struct objc_object {
+  struct objc_class *isa;
+} *id;
+
+@interface NSObject {
+  struct objc_class *isa;
+}
+@end
+@interface Whatever : NSObject
++self;
+@end
+
+static void func() {
+
+  id x;
+
+  [(*x).isa self]; // expected-error {{direct access to Objective-C's isa is deprecated in favor of object_getClass()}}
+  [x->isa self];   // expected-error {{direct access to Objective-C's isa is deprecated in favor of object_getClass()}}
+}