Unable to catch exceptions occurring within async* function returning a Stream in Web(Flutter for Web, DartPad). #140199
Labels
blocked
Issue is blocked by another issue
dependency: dart
Dart team may need to help us
found in release: 3.16
Found to occur in 3.16
found in release: 3.18
Found to occur in 3.18
framework
flutter/packages/flutter repository. See also f: labels.
has reproducible steps
The issue has been confirmed reproducible and is ready to work on
platform-web
Web applications specifically
r: duplicate
Issue is closed as a duplicate of an existing issue
team-web
Owned by Web platform team
Comments
|
Hi @eaglesakura. |
dam-ease
added
the
waiting for customer response
|
Thanks, @dam-ease . Sample(with UI)import 'package:flutter/material.dart';
Future main() async {
Stream<int> step1() async* {
yield 0;
await Future.delayed(const Duration(milliseconds: 100));
yield 1;
throw Exception('error');
}
Stream<int> step2() async* {
await for (final v in step1()) {
yield v;
}
}
try {
await for (final v in step2()) {
debugPrint('v: $v');
}
} catch (e) {
debugPrint('e: $e');
}
debugPrint('finish, start app!');
runApp(
MaterialApp(
title: 'Sample',
theme: ThemeData.light(),
home: const Scaffold(
body: Center(
child: Text(
'Hello, World!',
),
),
),
),
);
}
Console LogRun on Chrome(VSCode / Debug Build): Run On Android(VSCode / Debug Build) Flutter Doctor output |
github-actions
bot
removed
the
waiting for customer response
|
Thanks for your response. Deleting this line as in steps import 'package:flutter/material.dart'; // <- delete this Line.
The issue still occurs on flutter web but doesn't with DartPad. flutter doctor -v
|
dam-ease
changed the title
dam-ease
added
dependency: dart
|
cc @nshahan DDC discrepancy? |
Correct! Makes sense based on the fact that dartpad with a flutter import uses DDC and without uses dart2js. I confirmed locally and filed dart-lang/sdk#54411 to track on our end. |
|
Closing in favor of the Dart SDK issue. |
dam-ease
added
r: invalid
|
This thread has been automatically locked since there has not been any recent activity after it was closed. If you are still experiencing a similar issue, please open a new bug, including the output of |
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Steps to reproduce
import 'package:flutter/material.dart';Expected results
Console Log
Before(sample code)
After(delete
import 'package:flutter/material.dart';)Actual results
Executing the provided code in DartPad results in freezing instead of handling the thrown exception gracefully, unlike other non-web Dart environments, where the exception is appropriately logged.
Code sample
Code sample
Screenshots or Video
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[Paste your logs here]Flutter Doctor output
Doctor output
[Paste your output here]The text was updated successfully, but these errors were encountered: