pkg/front_end/testcases/general/invalid_super_initializer.dart

// Copyright (c) 2021, 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.

abstract class A {}

class B extends A {
  B(): super()?.foo() {}
}

bad() {
  new B();
}

main() {}