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c74dd07a4a
Using interpolation ensures that a `null` returned from `o.toString()` in a non-sound application is treated consistently. The error message has been upgraded to include the receiver to make it easier to find the method. Since this error values are reported using `Error.safeToString`, this will be reported using the class name: ``` ArgumentError (object): toString method returned 'null': Instance of 'BadToString' ``` VM, DDC and dart2js runtimes are updated to make the handling consistent on VM and web. TEST=added Change-Id: I48d8f721dfb3a431dbeacdaa39a9f3a8273e902c Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/214741 Commit-Queue: Stephen Adams <sra@google.com> Reviewed-by: Lasse R.H. Nielsen <lrn@google.com>
31 lines
727 B
Dart
31 lines
727 B
Dart
// Copyright (c) 2021, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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// @dart = 2.9
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import "package:expect/expect.dart";
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class BadToString {
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@override
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String toString() => null;
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}
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void test(expected, object) {
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var message = '';
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if (expected == null) {
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Expect.throws(() => '$object',
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(error) => '$error'.contains("toString method returned 'null'"));
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} else {
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Expect.equals(expected, '$object');
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}
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}
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void main() {
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test("123", 123);
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test("null", null);
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test(null, BadToString());
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test(null, [BadToString()]);
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test(null, {BadToString()});
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}
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