LSP doesn't work with .NET 6 and Mac M1 with Ionide

[leolorenzoluis]

Based off my findings it looks like Ionide uses a dependency that doesn't work with M1/.NET 6. Find references doesn't work with M1 with .NET 6

'libe_sqlite3' (no such file), '/usr/local/lib/libe_sqlite3' (no such file), '/usr/lib/libe_sqlite3' (no such file),

https://github.com/fsharp/FsAutoComplete/blob/main/paket.dependencies#L33

Which causes this to happen: ionide/ionide-vscode-fsharp#1707

Which might be related due to this: ericsink/SQLitePCL.raw#468

Not sure if package dependencies need to be updated for SQLitePCL

[razzmatazz]

Mhm, actually it does work for me on M1 w/.NET 6 (installed with dotnet tool install -g fsautocomplete and runs as native binary), but I hit another issue with excessive CPU usage:

• Excessive CPU usage w/ reduced interactiveness on M1 Mac #925

This is my lsp/find refs call/response for a proof from emacs/lsp-mode :)

[Trace - 10:14:18 PM] Sending request 'textDocument/references - (313)'.
Params: {
  "textDocument": {
    "uri": "file:///Users/bob/src/csharp-language-server/src/CSharpLanguageServer/Server.fs"
  },
  "position": {
    "line": 1478,
    "character": 8
  },
  "context": {
    "includeDeclaration": false
  }
}


[Trace - 10:14:18 PM] Received response 'textDocument/references - (313)' in 3ms.
Result: [
  {
    "uri": "file:///Users/bob/src/csharp-language-server/src/CSharpLanguageServer/Server.fs",
    "range": {
      "start": {
        "line": 1483,
        "character": 8,
        "debuggerDisplay": "(1483,8)"
      },
      "end": {
        "line": 1483,
        "character": 14,
        "debuggerDisplay": "(1483,14)"
      },
      "debuggerDisplay": "(1483,8)-(1483,14)"
    }
  }
]

[razzmatazz]

@leolorenzoluis what macos version are you running this on?

btw, how did you install fsautocomplete? via dotnet tool install -g fsautocomplete or via some other mechanism that ionide extension uses?

I wonder if it could be that dotnet tool-installed fsautocomplete has a different runtime environment than the version downloaded and installed by vscode/ionide extension..

[leolorenzoluis]

@razzmatazz macOS Monterey 12.3.1. I did not install fsautocomplete globally, but through Ionide. Does it work in your case with VS Code and Ionide?

[razzmatazz]

hmm, it does.. I tried to uninstall fsautocomplete via dotnet tool uninstall -g fsautocomplete and it still works for me, so I think vscode-ionide uses some local installation of fsautocomplete (not from dotnet tools);

the project I am testing this with is https://github.com/razzmatazz/csharp-language-server

[leolorenzoluis]

I cloned your repo and tested, I get no references for other variables. Also just to add, find references partially work like if it's within the local scope of the function, but it doesn't find references outside say usages of the variable within a module.

I also encountered CPU excessive usage which caused my M1 to be hot!

I tested with Project Rider and their find references works fine.

[razzmatazz]

One unrelated thing is that fsac does not compile on macOS/arm64 for me, caused by:

• MemoryMappedFile.CreateNew on macOS throws System.IO.PathTooLongException dotnet/runtime#63240

Seems to be fixed on latest dotnet/runtime @ master a couple of weeks ago:

• Reduce max shared memory object name length dotnet/runtime#68541

Seems to be fixed on dotnet/7 only though.

[razzmatazz]

I also encountered CPU excessive usage which caused my M1 to be hot!

FYI; at least the cpu hogging issue has been seeming fixed for me with v0.56.2

[TheAngryByrd]

Since this seems like a runtime issue I'm gonna go ahead and close it.