pkg/front_end/testcases/nnbd_mixed/type_parameter_nullability_lib.dart

// Copyright (c) 2020, 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=2.6

class D<T extends num> {
  void promoteLegacy(T t) {
    if (t is int) {
      t?.isEven; // Creates T* & int!
    }
  }
}