/* 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/Object.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