tests/language_2/nnbd/type_promotion/function_expression_is_type_mutated_in_closure_test.dart

// Copyright (c) 2019, 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.

// SharedOptions=--enable-experiment=non-nullable

void f() {
  void g(Object x) {
    if (x is String) {
      x.length; //# none: compile-time error
    }

    void h() {
      x = 42;
    }
  }
}

void main() {}