[iOS] OS Error: No route to host, errno = 65 will raise local network devices finding dialog unexpectedly under the release mode #171197
Description
Steps to reproduce
When requesting a URL with no route to its host under release mode, the Local Network Devices Finding dialog will appear unexpectedly.
Expected results
The corresponding dialog will not appear.
Actual results
The dialog appeared unexpectedly.
Code sample
In this case, I'm using the host I cannot reach from my network connection. You can replace it with another destination that has no route for it.
Code sample
import 'dart:io';
import 'package:flutter/material.dart';
void main() {
runApp(const MyApp());
}
class MyApp extends StatelessWidget {
const MyApp({super.key});
@override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Flutter Demo',
theme: ThemeData(
colorScheme: ColorScheme.fromSeed(seedColor: Colors.deepPurple),
),
home: const MyHomePage(title: 'Flutter Demo Home Page'),
);
}
}
class MyHomePage extends StatefulWidget {
const MyHomePage({super.key, required this.title});
final String title;
@override
State<MyHomePage> createState() => _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage> {
final client = HttpClient();
@override
void initState() {
super.initState();
client.getUrl(Uri.parse('https://flutter.dev')).then((request) {
request.close();
});
}
@override
void dispose() {
client.close();
super.dispose();
}
void _incrementCounter() {
// Replace this destination with another that throws `no route to host` as well.
client.getUrl(Uri.parse('https://web3.okx.com')).then((request) {
request.close();
});
}
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
backgroundColor: Theme.of(context).colorScheme.inversePrimary,
title: Text(widget.title),
),
body: Center(
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
Text(
'Running this example on iOS with Release mode will '
'show the popup asking for local network access.',
style: Theme.of(context).textTheme.headlineMedium,
),
],
),
),
floatingActionButton: FloatingActionButton(
onPressed: _incrementCounter,
tooltip: 'Increment',
child: const Icon(Icons.add),
),
);
}
}Screenshots or Video
Screenshots / Video demonstration
Logs
Logs
Launching lib/main.dart on Alex iPhone 🌕 in release mode...
Automatically signing iOS for device deployment using specified development team in Xcode project: 64MAFNBS88
Running Xcode build...
Xcode build done. 7.1s
Installing and launching...
[ERROR:flutter/runtime/dart_vm_initializer.cc(40)] Unhandled Exception: SocketException: Failed host lookup: 'flutter.dev' (OS Error: nodename nor servname provided, or not known, errno = 8)
#0 _NativeSocket.startConnect (dart:io-patch/socket_patch.dart:822)
#1 _RawSocket.startConnect (dart:io-patch/socket_patch.dart:2295)
#2 RawSocket.startConnect (dart:io-patch/socket_patch.dart:41)
#3 RawSecureSocket.startConnect (dart:io/secure_socket.dart:334)
#4 SecureSocket.startConnect (dart:io/secure_socket.dart:85)
#5 _ConnectionTarget.connect (dart:_http/http_impl.dart:2704)
#6 _HttpClient._getConnection.connect (dart:_http/http_impl.dart:3225)
#7 _HttpClient._getConnection (dart:_http/http_impl.dart:3230)
#8 _HttpClient._openUrl (dart:_http/http_impl.dart:3053)
#9 _HttpClient.getUrl (dart:_http/http_impl.dart:2880)
#10 _MyHomePageState.initState (package:test_app/main.dart:39)
#11 StatefulElement._firstBuild (package:flutter/src/widgets/framework.d<…>
[ERROR:flutter/runtime/dart_vm_initializer.cc(40)] Unhandled Exception: SocketException: Connection failed (OS Error: No route to host, errno = 65), address = web3.okx.com, port = 443
#0 _NativeSocket.startConnect (dart:io-patch/socket_patch.dart:822)
#1 _RawSocket.startConnect (dart:io-patch/socket_patch.dart:2295)
#2 RawSocket.startConnect (dart:io-patch/socket_patch.dart:41)
#3 RawSecureSocket.startConnect (dart:io/secure_socket.dart:334)
#4 SecureSocket.startConnect (dart:io/secure_socket.dart:85)
#5 _ConnectionTarget.connect (dart:_http/http_impl.dart:2704)
#6 _HttpClient._getConnection.connect (dart:_http/http_impl.dart:3225)
#7 _HttpClient._getConnection (dart:_http/http_impl.dart:3230)
#8 _HttpClient._openUrl (dart:_http/http_impl.dart:3053)
#9 _HttpClient.getUrl (dart:_http/http_impl.dart:2880)
#10 _MyHomePageState._incrementCounter (package:test_app/main.dart:51)
#11 _InkResponseState.handleTap (package:flutter/src/material/ink_well.<…>Flutter Doctor output
Doctor output
[✓] Flutter (Channel stable, 3.32.5, on macOS 15.3.2 24D81 darwin-arm64, locale zh-Hans-CN) [427ms]
• Flutter version 3.32.5 on channel stable at /Users/alex/dev/flutter
• Upstream repository https://github.com/flutter/flutter.git
• Framework revision fcf2c11572 (28 hours ago), 2025-06-24 11:44:07 -0700
• Engine revision dd93de6fb1
• Dart version 3.8.1
• DevTools version 2.45.1
• Pub download mirror https://pub.flutter-io.cn
• Flutter download mirror https://storage.flutter-io.cn
[✓] Xcode - develop for iOS and macOS (Xcode 16.2) [797ms]
• Xcode at /Applications/Xcode.app/Contents/Developer
• Build 16C5032a
• CocoaPods version 1.16.2
[✓] Connected device (4 available) [6.3s]
• Alex iPhone 🌕 (mobile) • 00000000-0000000000000000 • ios • iOS 18.3.2 22D82