An error occurred when handling textDocument/completion

[itome]

I'm using https://github.com/emacs-lsp/lsp-mode for client.
Bellow error occurred when sending textDocuemnt/completion.

An error occurred while handling textDocument/completion request
An error occurred while handling textDocument/completion request
#0      Object.noSuchMethod (dart:core-patch/object_patch.dart:50:5)
#1      elementKindToCompletionItemKind (package:analysis_server/src/lsp/mapping.dart:154:31)
#2      toCompletionItem (package:analysis_server/src/lsp/mapping.dart:394:9)
#3      CompletionHandler._getItems.<anonymous closure> (package:analysis_server/src/lsp/handlers/handler_completion.dart:97:26)
#4      MappedListIterable.elementAt (dart:_internal/iterable.dart:414:29)
#5      ListIterable.toList (dart:_internal/iterable.dart:219:19)
#6      CompletionHandler._getItems (package:analysis_server/src/lsp/handlers/handler_completion.dart:105:12)
<asynchronous suspension>
#7      CompletionHandler.handle.<anonymous closure> (package:analysis_server/src/lsp/handlers/handler_completion.dart:65:41)
#8      ErrorOr.mapResult (package:analysis_server/lsp_protocol/protocol_special.dart:181:12)
#9      CompletionHandler.handle (package:analysis_server/src/lsp/handlers/handler_completion.dart:65:19)
<asynchronous suspension>
#10     MessageHandler.handleMessage (package:analysis_server/src/lsp/handlers/handlers.dart:84:12)
#11     ServerStateMessageHandler.handleMessage (package:analysis_server/src/lsp/handlers/handlers.dart:105:19)
<asynchronous suspension>
#12     LspAnalysisServer.handleMessage.<anonymous closure>.<anonymous closure> (package:analysis_server/src/lsp/lsp_analysis_server.dart:278:49)
<asynchronous suspension>
#13     _PerformanceTagImpl.makeCurrentWhile (package:analyzer/src/generated/utilities_general.dart:258:15)
#14     LspAnalysisServer.handleMessage.<anonymous closure> (package:analysis_server/src/lsp/lsp_analysis_server.dart:273:50)
#15     _rootRun (dart:async/zone.dart:1124:13)
#16     _CustomZone.run (dart:async/zone.dart:1021:19)
#17     _runZoned (dart:async/zone.dart:1516:10)
#18     runZoned (dart:async/zone.dart:1500:12)
#19     LspAnalysisServer.handleMessage (package:analysis_server/src/lsp/lsp_analysis_server.dart:272:5)
#20     LspByteStreamServerChannel._readMessage.<anonymous closure> (package:analysis_server/src/lsp/channel/lsp_byte_stream_channel.dart:95:18)
#21     _PerformanceTagImpl.makeCurrentWhile (package:analyzer/src/generated/utilities_general.dart:258:15)
#22     LspByteStreamServerChannel._readMessage (package:analysis_server/src/lsp/channel/lsp_byte_stream_channel.dart:91:47)
#23     LspByteStreamServerChannel.listen.<anonymous closure> (package:analysis_server/src/lsp/channel/lsp_byte_stream_channel.dart:61:24)
#24     _rootRunUnary (dart:async/zone.dart:1132:38)
#25     _CustomZone.runUnary (dart:async/zone.dart:1029:19)
#26     _CustomZone.runUnaryGuarded (dart:async/zone.dart:931:7)
#27     _BufferingStreamSubscription._sendData (dart:async/stream_impl.dart:336:11)
#28     _DelayedData.perform (dart:async/stream_impl.dart:591:14)
#29     _StreamImplEvents.handleNext (dart:async/stream_impl.dart:707:11)
#30     _PendingEvents.schedule.<anonymous closure> (dart:async/stream_impl.dart:667:7)
#31     _rootRun (dart:async/zone.dart:1120:38)
#32     _CustomZone.run (dart:async/zone.dart:1021:19)
#33     _CustomZone.runGuarded (dart:async/zone.dart:923:7)
#34     _CustomZone.bindCallbackGuarded.<anonymous closure> (dart:async/zone.dart:963:23)
#35     _rootRun (dart:async/zone.dart:1124:13)
#36     _CustomZone.run (dart:async/zone.dart:1021:19)
#37     _CustomZone.runGuarded (dart:async/zone.dart:923:7)
#38     _CustomZone.bindCallbackGuarded.<anonymous closure> (dart:async/zone.dart:963:23)
#39     _microtaskLoop (dart:async/schedule_microtask.dart:41:21)
#40     _startMicrotaskLoop (dart:async/schedule_microtask.dart:50:5)
#41     _runPendingImmediateCallback (dart:isolate-patch/isolate_patch.dart:115:13)
#42     _RawReceivePortImpl._handleMessage (dart:isolate-patch/isolate_patch.dart:172:5)

[natebosch]

cc @DanTup

[DanTup]

Thanks for the report!

I've got a fix for review at https://dart-review.googlesource.com/c/sdk/+/103131/.

If you're using Dart (without Flutter), then the day after this lands you could test it with a nightly build. If you're using Flutter it may take a few days to roll into the master branch where you could test it there.

If you hit any other issues, please do let us know (and feel free to CC me directly on the issue if it seems LSP related). Thanks!

[itome]

Thanks!
I'm personally flutter user but I'll try the nightly build after the fix is merged.
I leave this pull request open until I check the fix.

[DanTup]

The bot will probably close this when the issue lands, but if you think it's not fixed please do just shout and we can reopen it.