dart-sdk/tests/lib/async/intercept_schedule_microtask6_test.dart
Lasse R.H. Nielsen b06a34fc5a Don't allow completing a _Future with itself.
This never worked. It was silently accepted, at least if the future had no listeners, then any later attempt to use the future would cause a stack overflow or other impossible results.

Moves some `_Future._complete` call out of try-catch.
The `_complete` shouldn't throw (but before this fix it could).
Moving them out of the `try`/`catch` makes such errors be reported
as unhandled, instead of catching them and trying to complete the same
future again with an error, when it's possibly in an inconsistent state.

Fixes #43662.
Based on https://github.com/dart-lang/sdk/issues/43662#issuecomment-2058870247

CoreLibraryReviewExempt: No response.
Bug: http://dartbug.com/43662
Change-Id: I96a4f01bcd5b6cee93bba267299852569a9b905c
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/363060
Commit-Queue: Lasse Nielsen <lrn@google.com>
Reviewed-by: Nate Bosch <nbosch@google.com>
Reviewed-by: Martin Kustermann <kustermann@google.com>
2024-05-14 15:44:07 +00:00

57 lines
1.1 KiB
Dart

// Copyright (c) 2013, 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 'dart:async';
import 'package:async_helper/async_helper.dart';
import 'package:expect/expect.dart';
import 'catch_errors.dart';
class A {
add(x) => print(x);
}
var events = [];
body() {
events.add("body entry");
scheduleMicrotask(() {
events.add("run async body");
throw "foo";
});
return 499;
}
onAsyncHandler(fun) {
events.add("async handler");
scheduleMicrotask(fun);
events.add("async handler done");
}
onErrorHandler(e) {
events.add("error: $e");
}
main() {
asyncStart();
// Test that runZonedScheduleMicrotask works when async, error and done
// are used.
var result = runZonedScheduleMicrotask(body,
onScheduleMicrotask: onAsyncHandler, onError: onErrorHandler);
events.add("after");
Timer.run(() {
Expect.listEquals([
"body entry",
"async handler",
"async handler done",
"after",
"run async body",
"error: foo"
], events);
asyncEnd();
});
}