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Description
Command
flutter attach --machine -d emulator-5554 --devtools-server-address http://127.0.0.1:9100/Steps to Reproduce
- ...
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Logs
ArgumentError: Invalid argument(s): No host specified in URI http://:0/null/ws
#0 _HttpClient._openUrl (dart:_http/http_impl.dart:2986:9)
#1 _HttpClient.openUrl (dart:_http/http_impl.dart:2863:7)
#2 _WebSocketImpl.connect (dart:_http/websocket_impl.dart:1093:10)
#3 WebSocket.connect (dart:_http/websocket.dart:332:24)
#4 _defaultOpenChannel.<anonymous closure> (package:flutter_tools/src/vmservice.dart:145:26)
#5 _defaultOpenChannel (package:flutter_tools/src/vmservice.dart:150:33)
#6 createVmServiceDelegate (package:flutter_tools/src/vmservice.dart:375:50)
#7 _connect (package:flutter_tools/src/vmservice.dart:401:54)
#8 connectToVmService (package:flutter_tools/src/vmservice.dart:357:19)
#9 FlutterDevice.connect.<anonymous closure> (package:flutter_tools/src/resident_runner.dart:364:21)
<asynchronous suspension>[!] Flutter (Channel stable, 3.41.4, on Microsoft Windows [versÆo 10.0.26200.8037], locale pt-BR) [308ms]
• Flutter version 3.41.4 on channel stable at C:\flutter-sdk\flutter
! Warning: `flutter` on your path resolves to C:\Users\Danil\fvm\versions\3.7.12\bin\flutter, which is not inside your current Flutter SDK checkout at C:\flutter-sdk\flutter. Consider adding C:\flutter-sdk\flutter\bin to the front of your path.
! Warning: `dart` on your path resolves to C:\Users\Danil\fvm\versions\3.7.12\bin\dart, which is not inside your current Flutter SDK checkout at C:\flutter-sdk\flutter. Consider adding C:\flutter-sdk\flutter\bin to the front of your path.
• Upstream repository https://github.com/flutter/flutter.git
• Framework revision ff37bef603 (2 weeks ago), 2026-03-03 16:03:22 -0800
• Engine revision e4b8dca3f1
• Dart version 3.11.1
• DevTools version 2.54.1
• Feature flags: enable-web, enable-linux-desktop, enable-macos-desktop, enable-windows-desktop, enable-android, enable-ios, cli-animations, enable-native-assets, omit-legacy-version-file, enable-lldb-debugging, enable-uiscene-migration
• If those were intentional, you can disregard the above warnings; however it is recommended to use "git" directly to perform update checks and upgrades.
[✓] Windows Version (11 Pro 64-bit, 25H2, 2009) [1.069ms]
[!] Android toolchain - develop for Android devices (Android SDK version 36.1.0) [303ms]
• Android SDK at C:\Users\Danil\AppData\Local\Android\Sdk
• Emulator version 36.4.9.0 (build_id 14788078) (CL:N/A)
✗ cmdline-tools component is missing.
Try installing or updating Android Studio.
Alternatively, download the tools from https://developer.android.com/studio#command-line-tools-only and make sure to set the ANDROID_HOME environment variable.
See https://developer.android.com/studio/command-line for more details.
✗ Android license status unknown.
Run `flutter doctor --android-licenses` to accept the SDK licenses.
See https://flutter.dev/to/windows-android-setup for more details.
[✓] Chrome - develop for the web [94ms]
• Chrome at C:\Program Files\Google\Chrome\Application\chrome.exe
[✓] Visual Studio - develop Windows apps (Visual Studio Community 2022 17.14.27 (February 2026)) [92ms]
• Visual Studio at C:\Program Files\Microsoft Visual Studio\2022\Community
• Visual Studio Community 2022 version 17.14.37012.4
• Windows 10 SDK version 10.0.26100.0
[✓] Connected device (4 available) [264ms]
• sdk gphone64 x86 64 (mobile) • emulator-5554 • android-x64 • Android 16 (API 36) (emulator)
• Windows (desktop) • windows • windows-x64 • Microsoft Windows [versÆo 10.0.26200.8037]
• Chrome (web) • chrome • web-javascript • Google Chrome 145.0.7632.160
• Edge (web) • edge • web-javascript • Microsoft Edge 146.0.3856.59
[✓] Network resources [280ms]
• All expected network resources are available.
! Doctor found issues in 2 categories.
Flutter Application Metadata
Type: app
Version: 1.0.0+1
Material: true
Android X: false
Module: false
Plugin: false
Android package: null
iOS bundle identifier: null
Creation channel: stable
Creation framework version: 90c64ed
Plugins
flutter_barcode_scanner-2.0.0
flutter_localization-0.1.14
path_provider_foundation-2.3.1
shared_preferences_foundation-2.3.4
sqflite-2.2.8+4
flutter_plugin_android_lifecycle-2.0.17
path_provider_android-2.2.1
shared_preferences_android-2.2.1
path_provider_linux-2.2.1
shared_preferences_linux-2.3.2
path_provider_windows-2.2.1
shared_preferences_windows-2.3.2
shared_preferences_web-2.2.1
Activity
saurabh-mirajkar commentedon Mar 18, 2026
@danilosilvaprime Thanks for the report. Looks similar to issue #81707.
Please confirm if you are able to facing the issue in a fresh Flutter project. If yes, please share the below details for better understanding:
Much appreciated if you mention these details in the issue report itself.
github-actions commentedon Apr 8, 2026
Without additional information, we are unfortunately not sure how to resolve this issue. We are therefore reluctantly going to close this bug for now.
If you find this problem please file a new issue with the same description, what happens, logs and the output of 'flutter doctor -v'. All system setups can be slightly different so it's always better to open new issues and reference the related ones.
Thanks for your contribution.
github-actions commentedon Apr 22, 2026
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
flutter doctor -vand a minimal reproduction of the issue.