tests/language/null/checked_null_test.dart

// Copyright (c) 2012, 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.

import "package:expect/expect.dart";

class A {
  Map? a;
  Comparator? b;
  // This code exhibited a bug in dart2js, where the type of [a] was inferred to
  // be [Comparator] or null;
  A()
      : b = null,
        a = null;
}

main() {
  Expect.throws(bar);
}

bar() {
  // We would create a typed selector for the call to foo, where the
  // receiver type is a typedef. Some code in the dart2js backend were
  // not dealing correctly with typedefs and lead the compiler to
  // crash.
  new A().a?.foo();
  //         ^^^
  // [analyzer] COMPILE_TIME_ERROR.UNDEFINED_METHOD
  // [cfe] The method 'foo' isn't defined for the class 'Map<dynamic, dynamic>'.
}