Eglot not launching properly in .fsx files

[KaranAhlawat]

Description

.fsx file + eglot does not work. Errors out with [eglot]: -1. server died

Repro steps

1. Install fsharp-mode and eglot-fsharp

2. Open any .fsx file

3. M-x eglot

Expected behavior

For eglot-fsharp to fire up properly, providing the relevant functionalities.

Actual behavior

Errors out trying to access the lost+found folder.

Known workarounds

Not to use eglot-fsharp and instead install fsautocomplete globally. Then add the command to launch fsautocomplete to eglot-server-programs manually.

But then it breaks the functionality in .fs files.

Related information

• Operating system: Arch Linux
• Branch: latest stable
• Emacs version: 28
• .NET Runtime, CoreCLR or Mono Version: 6.0
• Performance information, links to performance testing scripts: nil

[juergenhoetzel]

this (upstream) issue arises when the directory of the .fsx file also contains non-readable files:

[stderr] nil
[stderr] Unhandled exception. System.UnauthorizedAccessException: Access to the path '/tmp/systemd-private-0543139b94d844abb5567d9f5922f453-fwupd.service-6N8x5P' is denied.
[stderr]  ---> System.IO.IOException: Permission denied
[stderr]    --- End of inner exception stack trace ---
[stderr]    at System.IO.Enumeration.FileSystemEnumerator`1.CreateDirectoryHandle(String path, Boolean ignoreNotFound)
[stderr]    at System.IO.Enumeration.FileSystemEnumerator`1.Init()
[stderr]    at System.IO.Enumeration.FileSystemEnumerator`1..ctor(String directory, Boolean isNormalized, EnumerationOptions options)
[stderr]    at System.IO.Enumeration.FileSystemEnumerable`1..ctor(String directory, FindTransform transform, EnumerationOptions options, Boolean isNormalized)
[stderr]    at System.IO.Enumeration.FileSystemEnumerableFactory.DirectoryInfos(String directory, String expression, EnumerationOptions options, Boolean isNormalized)
[stderr]    at System.IO.DirectoryInfo.InternalEnumerateInfos(String path, String searchPattern, SearchTarget searchTarget, EnumerationOptions options)
[stderr]    at System.IO.DirectoryInfo.GetDirectories(String searchPattern, EnumerationOptions enumerationOptions)
[stderr]    at System.IO.DirectoryInfo.GetDirectories()
[stderr]    at Ionide.ProjInfo.ProjectSystem.WorkspacePeek.scanDirs@58-1.GenerateNext(IEnumerable`1& next) in D:\a\proj-info\proj-info\src\Ionide.ProjInfo.ProjectSystem\WorkspacePeek.fs:line 58
[stderr]    at Microsoft.FSharp.Core.CompilerServices.GeneratedSequenceBase`1.MoveNextImpl() in D:\a\_work\1\s\src\fsharp\FSharp.Core\seqcore.fs:line 372
[stderr]    at Microsoft.FSharp.Core.CompilerServices.GeneratedSequenceBase`1.System.Collections.IEnumerator.MoveNext() in D:\a\_work\1\s\src\fsharp\FSharp.Core\seqcore.fs:line 404
[stderr]    at Ionide.ProjInfo.ProjectSystem.WorkspacePeek.scanDirs@58-1.GenerateNext(IEnumerable`1& next) in D:\a\proj-info\proj-info\src\Ionide.ProjInfo.ProjectSystem\WorkspacePeek.fs:line 63
[stderr]    at Microsoft.FSharp.Core.CompilerServices.GeneratedSequenceBase`1.MoveNextImpl() in D:\a\_work\1\s\src\fsharp\FSharp.Core\seqcore.fs:line 372
[stderr]    at Microsoft.FSharp.Core.CompilerServices.GeneratedSequenceBase`1.System.Collections.IEnumerator.MoveNext() in D:\a\_work\1\s\src\fsharp\FSharp.Core\seqcore.fs:line 404
[stderr]    at System.Collections.Generic.List`1..ctor(IEnumerable`1 collection)
[stderr]    at Microsoft.FSharp.Collections.SeqModule.ToArray[T](IEnumerable`1 source) in D:\a\_work\1\s\src\fsharp\FSharp.Core\seq.fs:line 825
[stderr]    at Microsoft.FSharp.Collections.ArrayModule.OfSeq[T](IEnumerable`1 source) in D:\a\_work\1\s\src\fsharp\FSharp.Core\array.fs:line 1059
[stderr]    at Ionide.ProjInfo.ProjectSystem.WorkspacePeek.peek(String rootDir, Int32 deep, FSharpList`1 excludedDirs) in D:\a\proj-info\proj-info\src\Ionide.ProjInfo.ProjectSystem\WorkspacePeek.fs:line 66
[stderr]    at <StartupCode$FsAutoComplete-Core>.$Commands.WorkspacePeek@1306.Invoke(Unit unitVar) in /home/runner/work/FsAutoComplete/FsAutoComplete/src/FsAutoComplete.Core/Commands.fs:line 1306
[stderr]    at Microsoft.FSharp.Control.AsyncPrimitives.CallThenInvoke[T,TResult](AsyncActivation`1 ctxt, TResult result1, FSharpFunc`2 part2) in D:\a\_work\1\s\src\fsharp\FSharp.Core\async.fs:line 446
[stderr]    at Microsoft.FSharp.Control.Trampoline.Execute(FSharpFunc`2 firstAction) in D:\a\_work\1\s\src\fsharp\FSharp.Core\async.fs:line 104
[stderr] --- End of stack trace from previous location ---
[stderr]    at Microsoft.FSharp.Control.AsyncPrimitives.Start@1077-1.Invoke(ExceptionDispatchInfo edi)
[stderr]    at Microsoft.FSharp.Control.Trampoline.Execute(FSharpFunc`2 firstAction) in D:\a\_work\1\s\src\fsharp\FSharp.Core\async.fs:line 104
[stderr]    at <StartupCode$FSharp-Core>.$Async.clo@181-16.Invoke(Object o) in D:\a\_work\1\s\src\fsharp\FSharp.Core\async.fs:line 183
[stderr]    at System.Threading.QueueUserWorkItemCallback.<>c.<.cctor>b__6_0(QueueUserWorkItemCallback quwi)
[stderr]    at System.Threading.ExecutionContext.RunForThreadPoolUnsafe[TState](ExecutionContext executionContext, Action`1 callback, TState& state)
[stderr]    at System.Threading.QueueUserWorkItemCallback.Execute()
[stderr]    at System.Threading.ThreadPoolWorkQueue.Dispatch()
[stderr]    at System.Threading.PortableThreadPool.WorkerThread.WorkerThreadStart()
[stderr]    at System.Threading.Thread.StartCallback()
[internal] Thu Apr  7 19:24:29 2022:
(:message "Connection state changed" :change "aborted (core dumped)\n")

Creating the .fsx file in a subfolder should work as a workaround.