|  | library; | 
|  | // | 
|  | // Problems in library: | 
|  | // | 
|  | // pkg/front_end/testcases/inference/mixin_inference_non_trivial_constraints.dart:7:27: Error: The class 'M0' can't be used as a mixin because it extends a class other than 'Object'. | 
|  | // mixin class M0<T> extends I<List<T>> {} | 
|  | //                           ^ | 
|  | // | 
|  | // pkg/front_end/testcases/inference/mixin_inference_non_trivial_constraints.dart:14:30: Error: The class 'M0' can't be used as a mixin because it extends a class other than 'Object'. | 
|  | // class A extends M2<int> with M0 {} | 
|  | //                              ^ | 
|  | // | 
|  | import self as self; | 
|  | import "dart:core" as core; | 
|  |  | 
|  | class I<X extends core::Object? = dynamic> extends core::Object { | 
|  | synthetic constructor •() → self::I<self::I::X%> | 
|  | : super core::Object::•() | 
|  | ; | 
|  | } | 
|  | mixin class M0<T extends core::Object? = dynamic> extends self::I<core::List<self::M0::T%>> { | 
|  | synthetic constructor •() → self::M0<self::M0::T%> | 
|  | : super self::I::•() | 
|  | ; | 
|  | } | 
|  | class M1<T extends core::Object? = dynamic> extends self::I<core::List<self::M1::T%>> { | 
|  | synthetic constructor •() → self::M1<self::M1::T%> | 
|  | : super self::I::•() | 
|  | ; | 
|  | } | 
|  | class M2<T extends core::Object? = dynamic> extends self::M1<core::Map<self::M2::T%, self::M2::T%>> { | 
|  | synthetic constructor •() → self::M2<self::M2::T%> | 
|  | : super self::M1::•() | 
|  | ; | 
|  | } | 
|  | class A extends self::_A&M2&M0 { | 
|  | synthetic constructor •() → self::A | 
|  | : super self::_A&M2&M0::•() | 
|  | ; | 
|  | } | 
|  | abstract class _A&M2&M0 = self::M2<core::int> with self::M0<core::Map<core::int, core::int>> /*isAnonymousMixin*/  { | 
|  | synthetic constructor •() → self::_A&M2&M0 | 
|  | : super self::M2::•() | 
|  | ; | 
|  | } | 
|  | static method main() → dynamic {} |