| library; | 
 | // | 
 | // Problems in library: | 
 | // | 
 | // pkg/front_end/testcases/general/issue45490.dart:7:29: Error: Expected '>' after this. | 
 | // class test<X extends A> = A<X extends A<X>>; | 
 | //                             ^ | 
 | // | 
 | // pkg/front_end/testcases/general/issue45490.dart:7:44: Error: Expected 'with' before this. | 
 | // class test<X extends A> = A<X extends A<X>>; | 
 | //                                            ^ | 
 | // | 
 | import self as self; | 
 | import "dart:core" as core; | 
 |  | 
 | class A<X extends core::Object? = dynamic> extends core::Object { | 
 |   synthetic constructor •() → self::A<self::A::X%> | 
 |     : super core::Object::•() | 
 |     ; | 
 | } | 
 | static method main() → dynamic {} |