pkg/front_end/testcases/general/var_as_type_name.dart

// Copyright (c) 2018, 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.

class A {
  Map<String, var>? m;
}

main() {
  var a = new A();
  a.m = null;
}