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05ca544f15
Change-Id: Iaa0ca2b4f2d1b15f79ddca37834d3ed2497bc068 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/149242 Commit-Queue: Joshua Litt <joshualitt@google.com> Reviewed-by: Sigmund Cherem <sigmund@google.com>
45 lines
1 KiB
Dart
45 lines
1 KiB
Dart
// Copyright (c) 2019, 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 = 2.7
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/// Regression test: stack trace could be null when using async-await.
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import 'dart:async';
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import 'package:expect/expect.dart';
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main() async {
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C value = await test();
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Expect.identical(StackTrace.empty, value._s);
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}
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Future<C> test() async {
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try {
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await throwInFuture();
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return C(StackTrace.fromString("no-throw"));
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} on MyException catch (e, s) {
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return C(s); // Note: s is *no longer* null
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}
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}
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Future<int> throwInFuture() {
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var completer = new Completer<int>();
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var future = completer.future;
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new Future(() {}).then((_) {
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StackTrace.fromString("hi");
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completer.completeError(new MyException());
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});
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return future;
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}
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class MyException {}
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class C {
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final StackTrace _s; // Global inference used to infer this field as non-null
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C(this._s);
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@override
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String toString() => '[[$_s]]';
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}
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