pkg/front_end/testcases/runtime_checks/generic_covariance_inheritance_setter_field.dart

// Copyright (c) 2017, the Dart project authors.  Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.
// @dart=2.9
/*@testedFeatures=checks*/
library test;

class C<T> {
  void set x(T t) {}
  T y;
}

class D implements C<num> {
  num x;
  num y;
}

class E implements C<num> {
  void set x(num t) {}
  num get y => null;
  void set y(num t) {}
}

void main() {}