Error in Layout Explorer

[kenzieschmoll]

vm_service.dart:2020 Uncaught (in promise) Error: Server error (-32000) from ext.flutter.inspector.getLayoutExplorerNode():
FormatException: Invalid empty scheme (at character 1)
:
^

#0      _Uri._fail (dart:core/uri.dart:1625:5)
#1      new _Uri.notSimple (dart:core/uri.dart:1469:9)
#2      Uri.parse (dart:core/uri.dart:1024:17)
#3      StackFrame.fromStackTraceLine (package:flutter/src/foundation/stack_frame.dart:218:32)
#4      MappedListIterable.elementAt (dart:_internal/iterable.dart:417:29)
#5      ListIterator.moveNext (dart:_internal/iterable.dart:346:26)
#6      SkipWhileIterator.moveNext (dart:_internal/iterable.dart:673:22)
#7      new List.from (dart:core-patch/array_patch.dart:47:19)
#8      Iterable.toList (dart:core/iterable.dart:400:5)
#9      StackFrame.fromStackString (package:flutter/src/foundation/stack_frame.dart:94:10)
#10     StackFrame.fromStackTrace (package:flutter/src/foundation/stack_frame.dart:80:12)
#11     FlutterErrorDetails.debugFillProperties (package:flutter/src/foundation/assertions.dart:557:57)
#12     DiagnosticableNode.builder (package:flutter/src/foundation/diagnostics.dart:2900:14)
#13     _FlutterErrorDetailsNode.builder (package:flutter/src/foundation/assertions.dart:996:55)
#14     DiagnosticableNode.emptyBodyDescription (package:flutter/src/foundation/diagnostics.dart:2911:58)
#15     DiagnosticsNode.toJsonMap (package:flutter/src/foundation/diagnostics.dart:1554:11)
#16     WidgetInspectorService._nodeToJson (package:flutter/src/widgets/widget_inspector.dart:1420:18)
#17     WidgetInspectorService._reportError (package:flutter/src/widgets/widget_inspector.dart:917:43)
#18     FlutterError.reportError (package:flutter/src/foundation/assertions.dart:903:14)
#19     BindingBase.registerServiceExtension.<anonymous closure> (package:flutter/src/foundation/binding.dart:538:22)
<asynchronous suspension>
#20     BindingBase.registerServiceExtension.<anonymous closure> (package:flutter/src/foundation/binding.dart)
#21     _runExtension (dart:developer-patch/developer.dart:86:23)

    

    at Object.createErrorWithStack (dart_sdk.js:4075)
    at Object._rethrow (dart_sdk.js:41760)
    at async._AsyncCallbackEntry.new.callback (dart_sdk.js:41756)
    at Object._microtaskLoop (dart_sdk.js:41616)
    at _startMicrotaskLoop (dart_sdk.js:41622)
    at dart_sdk.js:37798

[jacob314]

There are two bugs: 1. This is a Flutter framework bug dealing with stack traces from eval expression. The likely fix is a change in package:flutter 2. Why did the layout explorer trigger an exception in the first place? Do you recall what you were doing that reproduced the issue?

[kenzieschmoll]

I was just selecting a Column widget. I was developing DevTools on desktop MacOS. I then ran DevTools on Chrome to inspect the DevTools macos instance I was developing. I selected a Column widget from the UI I was building and kept getting this error.

[Jomik]

I am getting this error consistently in my project right now. Navigating to/from Layout Explorer seems to cause it, and changing widget in the tree view.. EDIT: Actually, nevermind. It seems to just happen constantly whenever I do anything in the Details Tree or the Widget Tree. And the Layout Explorer is not rendering at all.

[roeniss]

When I clicked any widget from Flutter inspector, the same error always occured:

// from /usr/local/Caskroom/flutter/1.22.5/flutter/bin/cache/pkg/sky_engine/lib/core/uri.dart:1627
  static Never _fail(String uri, int index, String message) {
    throw FormatException(message, uri, index);
  }

and the message said, "Invalid empty scheme".

My flutter doctor -v :

[✓] Flutter (Channel stable, 1.22.6, on Mac OS X 10.15.7 19H15 darwin-x64, locale ko-KR)
    • Flutter version 1.22.6 at /usr/local/Caskroom/flutter/1.22.5/flutter
    • Framework revision 9b2d32b605 (3 weeks ago), 2021-01-22 14:36:39 -0800
    • Engine revision 2f0af37152
    • Dart version 2.10.5


[✓] Android toolchain - develop for Android devices (Android SDK version 30.0.2)
    • Android SDK at /Users/home/Library/Android/sdk
    • Platform android-30, build-tools 30.0.2
    • ANDROID_HOME = /Users/home/Library/Android/sdk
    • ANDROID_SDK_ROOT = /Users/home/Library/Android/sdk
    • Java binary at: /Users/home/Library/Application Support/JetBrains/Toolbox/apps/AndroidStudio/ch-0/193.6626763/Android Studio.app/Contents/jre/jdk/Contents/Home/bin/java
    • Java version OpenJDK Runtime Environment (build 1.8.0_242-release-1644-b3-6222593)
    • All Android licenses accepted.

[✓] Xcode - develop for iOS and macOS (Xcode 12.4)
    • Xcode at /Applications/Xcode.app/Contents/Developer
    • Xcode 12.4, Build version 12D4e
    • CocoaPods version 1.10.0

It doens't look like normal behavior at all.

[nydjmkxxl]

Is there a solution to this problem? I have also encountered this problem, using the mac

[doug-orchard]

Unsuable for me on Mac running debug on an iOS device. Same issues as everyone above.

[kenzieschmoll]

@doug-orchard What version of Flutter (and DevTools) are you using?

[qizf7]

Can any body fix this? I am also involved in this problem. Layout inspector can't work .

[kenzieschmoll]

This may be related: https://github.com/flutter/flutter/issues/115228. It was fixed by https://github.com/flutter/flutter/pull/115526 yesterday - can you try on Flutter master and see if you are still seeing the problem?