"URI scheme 'c' is not supported" error using analyzer plugins with Dart 3.5 pre-release

[ChrisCRCB]

Hi,
Whenever I'm editing Dart code in a Flutter project in VS code, I get the following persistent notification:

Socket error: Invalid argument (uri): URI scheme 'c' is not supported. Allowed schemes are 'file', 'dart-macro+file'.: Socket error: Invalid argument (uri): URI scheme 'c' is not supported. Allowed schemes are 'file', 'dart-macro+file'.: "c:/Users/chris/src/ai_halls/lib/main.dart"

This does not happen with regular dart projects.

Cheers,

Chris

[DanTup]

Can you provide a screenshot of exactly where/how this is appearing? Is there any more information (such as a stack trace) either there, or if you click Help -> Toggle Developer Tools -> Console?

Can you also confirm the following:

Please complete the following information:

You can run the Dart: Collect Diagnostic Information command from the VS Code command palette (F1) to easily capture this information or provide it manually.

• Operating System and version:
• VS Code version:
• Dart extension version:
• Dart/Flutter SDK version:
• Target device (if the issue relates to Flutter debugging):

[ChrisCRCB]

!! ⚠️ PLEASE REVIEW THIS REPORT FOR SENSITIVE INFORMATION BEFORE SHARING ⚠️ !!

Workspace Environment

Dart Code extension: 3.90.0
Flutter extension: 3.90.0 (activated)

App: Visual Studio Code
App Host: desktop
Version: win 1.90.2

Workspace type: Flutter (LSP)

Dart (3.5.0-180.3.beta): C:\Users\chris\flutter\bin\cache\dart-sdk
Flutter (3.23.0-0.1.pre): C:\Users\chris\flutter (Windows (windows-x64/windows))

Output from 'dart info'

C:\Users\chris\flutter\bin\cache\dart-sdk\bin\dart.exe info

If providing this information as part of reporting a bug, please review the information
below to ensure it only contains things you're comfortable posting publicly.

General info

• Dart 3.5.0-180.3.beta (beta) (Wed Jun 5 15:06:15 2024 +0000) on "windows_x64"
• on windows / "Windows 10 Home" 10.0 (Build 22631)
• locale is en-GB

Project info

• sdk constraint: '>=3.5.0-180.3.beta <4.0.0'
• dependencies: backstreets_widgets, cupertino_icons, dart_openai, drift, drift_editors, flutter, flutter_riverpod, flutter_soloud, flutter_tts, json_annotation, path, path_provider, riverpod_annotation, shared_preferences, sqlite3, sqlite3_flutter_libs, url_launcher
• dev_dependencies: build_runner, custom_lint, drift_dev, flutter_lints, flutter_test, json_serializable, riverpod_generator, riverpod_lint

Process info

Memory	CPU	Elapsed time	Command line
115 MB	--		dart.exe
542 MB	--		dart.exe
92 MB	--		dart.exe
94 MB	--		dart.exe
99 MB	--		dart.exe

Output from 'flutter doctor'

C:\Users\chris\flutter\bin\flutter.bat doctor -v

[√] Flutter (Channel beta, 3.23.0-0.1.pre, on Microsoft Windows [Version 10.0.22631.3737], locale en-GB)
    • Flutter version 3.23.0-0.1.pre on channel beta at C:\Users\chris\flutter
    • Upstream repository https://github.com/flutter/flutter
    • Framework revision 2feea7a407 (3 weeks ago), 2024-06-06 10:19:10 +0700
    • Engine revision bb10c54666
    • Dart version 3.5.0 (build 3.5.0-180.3.beta)
    • DevTools version 2.36.0

[√] Windows Version (Installed version of Windows is version 10 or higher)

[√] Android toolchain - develop for Android devices (Android SDK version 34.0.0)
    • Android SDK at C:\Users\chris\AppData\Local\Android\sdk
    • Platform android-34, build-tools 34.0.0
    • Java binary at: C:\Program Files\Android\Android Studio\jbr\bin\java
    • Java version OpenJDK Runtime Environment (build 17.0.6+0-b2043.56-9586694)
    • All Android licenses accepted.

[√] Chrome - develop for the web
    • Chrome at C:\Program Files\Google\Chrome\Application\chrome.exe

[√] Visual Studio - develop Windows apps (Visual Studio Community 2022 17.8.2)
    • Visual Studio at C:\Program Files\Microsoft Visual Studio\2022\Community
    • Visual Studio Community 2022 version 17.8.34322.80
    • Windows 10 SDK version 10.0.22621.0

[√] Android Studio (version 2022.2)
    • Android Studio at C:\Program Files\Android\Android Studio
    • Flutter plugin can be installed from:
       https://plugins.jetbrains.com/plugin/9212-flutter
    • Dart plugin can be installed from:
       https://plugins.jetbrains.com/plugin/6351-dart
    • Java version OpenJDK Runtime Environment (build 17.0.6+0-b2043.56-9586694)

[√] VS Code, 64-bit edition (version 1.90.2)
    • VS Code at C:\Program Files\Microsoft VS Code
    • Flutter extension version 3.90.0

[√] Connected device (3 available)
    • Windows (desktop) • windows • windows-x64    • Microsoft Windows [Version 10.0.22631.3737]
    • Chrome (web)      • chrome  • web-javascript • Google Chrome 126.0.6478.126
    • Edge (web)        • edge    • web-javascript • Microsoft Edge 125.0.2535.92

[√] Network resources
    • All expected network resources are available.

• No issues found!

Interestingly, I don't get it with a clean project. Unless you can see something useful in these data, I'll remove dependencies one by one to see which (if any) are causing the problem. The error shows whether or not I'm running build_runner.

I can't see my screen, and am accessing VS Code with the NVDA screen reader. I can't show you a screenshot because I'm at work, and I can't guarantee that nothing sensitive (by which I mean work related) has made it sway into the screenshot.

I'm as sure as I can be that the debug tree is empty. The Copy All command from the console tree's context menu doesn't do anything.

Is there any more information I can give you?

Thank you for all your hard work. It is very much appreciated.

[DanTup]

@ChrisCRCB are you using custom_lint as an analyzer plugin? (it'll be listed in analysis_options.yaml). If so, could you try disabling that and restarting VS Code (or running the "Developer: Reload Window" command) and see if that changes anything?

Also - do you have any other Dart-related VS Code extensions installed?

On the surface, the error seems like something is passing a file path where a URI was expected (eg. it should start with file:/// but does not).

An analyzer log could help but it might be difficult to ensure there's nothing sensitive in it if this only occurs on a work project. If we can figure out a way to repro in an isolate project that would be best.

Thanks!

[ChrisCRCB]

@DanTup: Yes, I do have custom_lint running. Since disabling it everything works as expected.

Should I raise an issue against custom_lint?

[DanTup]

Thanks for testing. It's not clear to me if the bug is with custom_lint or if it's triggered by having it enabled. I did try enabling it on a new project but still couldn't reproduce. I don't suppose you're able to repro in a new project with custom_lint enabled?

(cc @rrousselGit in case he has any ideas or has seen this before)

[rrousselGit]

I've never seen this before. But it could be a custom_lint bug. Although it sounds like a windows issue.

Some way to reproduce this would be great.

[ChrisCRCB]

Hi,
If you run flutter create something, then cd into the directly, simply installing and activating custom_lint has no effect. Do dart pub add dev:riverpod_lint and the socket error happens when typing.

I wanted to find some other packages which use custom_lint to see if the bug lies in riverpod_lint, but there don't seem to be any others like riverpod_lint for comparison. I shall keep looking, unless you have any further ideas?

[rrousselGit]

Consider making an issue on Riverpod for this then :)

[DanTup]

@ChrisCRCB thank you! I was able to repro with this.

I'm not yet sure this isn't a Dart analysis server bug. It looks like it happens when the plugin triggers diagnostics:

1719407047113:PluginNoti:{"event"::"analysis.errors","params"::{"file"::"C::\\Dev\\Test Projects\\dartcode_5156\\lib\\main.dart","errors"::[{"severity"::"INFO","type"::"LINT","location"::{"file"::"C::\\Dev\\Test Projects\\dartcode_5156\\lib\\main.dart","offset"::60,"length"::6,"startLine"::4,"startColumn"::3,"endLine"::4,"endColumn"::9},"message"::"Flutter applications should have a ProviderScope widget at the top of the widget tree.","code"::"missing_provider_scope"}]}}:file::///C::/Users/danny/AppData/Local/.dartServer/.plugin_manager/87271fa197c6c85b743e1974d76d84a8/analyzer_plugin/bin/plugin.dart::
1719407047116:Res:{"jsonrpc"::"2.0","method"::"window/showMessage","params"::{"message"::"Socket error:: Invalid argument (uri):: URI scheme 'c' is not supported. Allowed schemes are 'file', 'dart-macro+file'.:: \"c::/Dev/Test%20Projects/dartcode_5156/lib/main.dart\"","type"::1}}

On the surface, the errors from the plugin look reasonable. I'll do some debugging later and post back. Thanks!