1 files changed, 34 insertions, 0 deletions
diff --git a/gcc/testsuite/objc.dg/super-class-4.m b/gcc/testsuite/objc.dg/super-class-4.m
new file mode 100644
index 000000000..a5ff9088b
--- /dev/null
+++ b/gcc/testsuite/objc.dg/super-class-4.m
@@ -0,0 +1,34 @@
+/* Bail out gracefully if attempting to derive from a class that has only been
+   forward-declared (via @class).  Conversely, @compatibility_alias declarations
+   should be traversed to find the @interface.  */
+/* { dg-do compile } */
+
+#include "../objc-obj-c++-shared/Object1.h"
+
+@class MyWpModule;
+
+@compatibility_alias MyObject Object;
+@compatibility_alias FictitiousModule MyWpModule;
+
+@protocol MySelTarget
+- (id) meth1;
+@end
+
+@protocol Img
+- (id) meth2;
+@end
+
+@interface FunnyModule: FictitiousModule <Img> /* { dg-error ".MyWpModule., superclass of .FunnyModule." } */
+- (id) meth2;
+@end
+
+@interface MyProjWpModule : MyWpModule <MySelTarget, Img> /* { dg-error ".MyWpModule., superclass of .MyProjWpModule." } */ {
+  id i1, i2;
+}
+- (id) meth1;
+- (id) meth2;
+@end
+
+@interface AnotherModule: MyObject <MySelTarget>
+- (id) meth1;
+@end