tests/language/implicit_downcast_during/assert_statement_test.dart

// Copyright (c) 2017, 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.

void main() {
  Object b = true;
  assert(b);
  //     ^
  // [analyzer] COMPILE_TIME_ERROR.NON_BOOL_EXPRESSION
  // [cfe] A value of type 'Object' can't be assigned to a variable of type 'bool'.
  assert(b, 'should not fail');
  //     ^
  // [analyzer] COMPILE_TIME_ERROR.NON_BOOL_EXPRESSION
  // [cfe] A value of type 'Object' can't be assigned to a variable of type 'bool'.
  assert(false, b);
  // OK, the message can have any type.
}