library;
//
// Problems in library:
//
// pkg/front_end/testcases/override_check_after_inference.dart:22:12: Error: The parameter 'x' of the method 'F.f' has type 'B', which does not match the corresponding type, 'A', in the overridden method, 'D.f'.
//  - 'B' is from 'pkg/front_end/testcases/override_check_after_inference.dart'.
//  - 'A' is from 'pkg/front_end/testcases/override_check_after_inference.dart'.
// Change to a supertype of 'A', or, for a covariant parameter, a subtype.
//   void f(B x) {}
//            ^
// pkg/front_end/testcases/override_check_after_inference.dart:14:8: Context: This is the overridden method ('f').
//   void f(x) {} // Inferred type: (A) -> void
//        ^
//
import self as self;
import "dart:core" as core;

class A extends core::Object {
  synthetic constructor •() → self::A
    : super core::Object::•()
    ;
}
class B extends self::A {
  synthetic constructor •() → self::B
    : super self::A::•()
    ;
}
class C extends core::Object {
  synthetic constructor •() → self::C
    : super core::Object::•()
    ;
  method f(self::A x) → void {}
}
class D extends self::C {
  synthetic constructor •() → self::D
    : super self::C::•()
    ;
  method f(self::A x) → void {}
}
class E extends self::D {
  synthetic constructor •() → self::E
    : super self::D::•()
    ;
  method f(self::A x) → void {}
}
class F extends self::D {
  synthetic constructor •() → self::F
    : super self::D::•()
    ;
  method f(self::B x) → void {}
}
static method main() → dynamic {}