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Running cshrap-ls causes a new instance of lsp to be created for every buffer / buffer navigation #1677

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Running cshrap-ls causes a new instance of lsp to be created for every buffer / buffer navigation#1677

Description

@OlegKarasik
OlegKarasik
opened on Jun 17, 2026

I tried to configure the csharp-ls as a language server using the following configuration:

if executable('csharp-ls')
    au User lsp_setup call lsp#register_server({
        \   'name': 'csharp-ls',
        \   'cmd': {server_info->['csharp-ls']},
        \   'allowlist': ['cs'],
        \   'root_uri': {
        \      server_info->lsp#utils#path_to_uri('<direct path to the project root with .sln file in it>')
        \   },
        \ })
endif

I was able to start the server and actually get the syntax highlighting and go-to-definition navigation. However, I noticed that every time I open a new buffer or just navigate between buffers (using :bn and :bp commands) the new instance of the csharp-ls is started.

I enabled the logs but inside them it looks like the vim-lsp correctly detects that the sever is running but still for some reason creates a new instance. Here is an excerpt from logs (sorry I know it is too large but I am not sure what information is relevant for the issue).

Do you have any ideas where the issue can be? I am open to contribute the fix if you can point me to the more or less the right place.

Tue Jun 16 21:36:17 2026:["Starting server","csharp-ls",["csharp-ls"]]
Tue Jun 16 21:36:17 2026:[{"response":{"data":{"__data__":"vim-lsp","lsp_id":7,"server_name":"csharp-ls"},"message":"started lsp server successfully"}}]
Tue Jun 16 21:36:17 2026:["--->",7,"csharp-ls",{"method":"initialize","params":{"rootUri":"file:///Users/shimanski/Projects/GitHub/apsp-problems/floyd-warshall","capabilities":{"workspace":{"workspaceFolders":false,"configuration":true,"symbol":{"dynamicRegistration":false},"applyEdit":true},"window":{"workDoneProgress":false},"textDocument":{"callHierarchy":{"dynamicRegistration":false},"rename":{"prepareSupport":true,"dynamicRegistration":false,"prepareSupportDefaultBehavior":1},"codeAction":{"isPreferredSupport":true,"disabledSupport":true,"codeActionLiteralSupport":{"codeActionKind":{"valueSet":["","quickfix","refactor","refactor.extract","refactor.inline","refactor.rewrite","source","source.organizeImports"]}},"dynamicRegistration":false},"completion":{"completionItem":{"insertReplaceSupport":true,"snippetSupport":false,"resolveSupport":{"properties":["additionalTextEdits","detail"]},"documentationFormat":["markdown","plaintext"]},"dynamicRegistration":false,"completionItemKind":{"valueSet":[10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,1,2,3,4,5,6,7,8,9]}},"formatting":{"dynamicRegistration":false},"codeLens":{"dynamicRegistration":false},"inlayHint":{"dynamicRegistration":false},"documentLink":{"dynamicRegistration":false},"hover":{"dynamicRegistration":false,"contentFormat":["markdown","plaintext"]},"rangeFormatting":{"dynamicRegistration":false},"declaration":{"dynamicRegistration":false,"linkSupport":true},"references":{"dynamicRegistration":false},"typeHierarchy":{"dynamicRegistration":false},"foldingRange":{"rangeLimit":5000,"dynamicRegistration":false,"lineFoldingOnly":true},"documentSymbol":{"symbolKind":{"valueSet":[10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,1,2,3,4,5,6,7,8,9]},"dynamicRegistration":false,"labelSupport":false,"hierarchicalDocumentSymbolSupport":false},"publishDiagnostics":{"relatedInformation":true},"synchronization":{"dynamicRegistration":false,"willSaveWaitUntil":false,"willSave":false,"didSave":true},"documentHighlight":{"dynamicRegistration":false},"implementation":{"dynamicRegistration":false,"linkSupport":true},"typeDefinition":{"dynamicRegistration":false,"linkSupport":true},"semanticTokens":{"serverCancelSupport":false,"requests":{"full":{"delta":true},"range":false},"multilineTokenSupport":false,"dynamicRegistration":false,"overlappingTokenSupport":false,"tokenTypes":["type","class","enum","interface","struct","typeParameter","parameter","variable","property","enumMember","event","function","method","macro","keyword","modifier","comment","string","number","regexp","operator"],"tokenModifiers":[],"formats":["relative"]},"signatureHelp":{"dynamicRegistration":false},"definition":{"dynamicRegistration":false,"linkSupport":true}}},"rootPath":"/Users/shimanski/Projects/GitHub/apsp-problems/floyd-warshall","clientInfo":{"name":"vim-lsp"},"processId":86000,"trace":"off"}}]
Tue Jun 16 21:36:17 2026:["<---(stderr)",7,"csharp-ls","21:36:17.963 info: LifeCycle[0]\n      initializing, csharp-ls version 0.25.0 (Punia)+19a9574d7577521555f49bf49e94688a3ba67dd2\n"]
Tue Jun 16 21:36:17 2026:["<---",7,"csharp-ls",{"response":{"method":"window/logMessage","jsonrpc":"2.0","params":{"message":"csharp-ls: initializing, version 0.25.0 (Punia)+19a9574d7577521555f49bf49e94688a3ba67dd2","type":3}}}]
Tue Jun 16 21:36:17 2026:["<---",7,"csharp-ls",{"response":{"method":"window/logMessage","jsonrpc":"2.0","params":{"message":"csharp-ls: csharp-ls is released under MIT license and is not affiliated with Microsoft Corp.; see https://github.com/razzmatazz/csharp-language-server","type":3}}}]
Tue Jun 16 21:36:17 2026:["<---(stderr)",7,"csharp-ls","21:36:17.990 info: LifeCycle[0]\n      csharp-ls is released under MIT license and is not affiliated with Microsoft Corp.; see https://github.com/razzmatazz/csharp-language-server\n"]
Tue Jun 16 21:36:18 2026:["<---(stderr)",7,"csharp-ls","21:36:18.002 info: Roslyn.Solution[0]\n      SDK instances found, as reported by MSBuild:\n      - SDK=\".NET Core SDK\", Version=10.0.301, MSBuildPath=\"/usr/local/share/dotnet/sdk/10.0.301\", DiscoveryType=DotNetSdk\n      - SDK=\".NET Core SDK\", Version=9.0.306, MSBuildPath=\"/usr/local/share/dotnet/sdk/9.0.306\", DiscoveryType=DotNetSdk\n"]
Tue Jun 16 21:36:18 2026:["<---(stderr)",7,"csharp-ls","21:36:18.002 info: Roslyn.Solution[0]\n      MSBuildLocator: will register \".NET Core SDK\", Version=10.0.301 as default instance\n"]
Tue Jun 16 21:36:18 2026:["<---(stderr)",7,"csharp-ls","21:36:18.020 info: LifeCycle[0]\n      handleInitialize: using workspaceFolders: [{\"uri\":\"file:///Users/shimanski/Projects/GitHub/apsp-problems/floyd-warshall\",\"name\":\"root\"}]\n"]
Tue Jun 16 21:36:18 2026:["<---",7,"csharp-ls",{"response":{"id":1,"jsonrpc":"2.0","result":{"capabilities":{"documentHighlightProvider":true,"hoverProvider":true,"typeDefinitionProvider":true,"definitionProvider":true,"referencesProvider":true,"diagnosticProvider":{"workspaceDiagnostics":true,"interFileDependencies":false,"documentSelector":[{"pattern":"**/*.cs","language":"csharp","scheme":"file"}]},"inlayHintProvider":{"resolveProvider":false},"signatureHelpProvider":{"triggerCharacters":["(",",","<","{","["]},"foldingRangeProvider":true,"callHierarchyProvider":true,"codeActionProvider":{"resolveProvider":true},"textDocumentSync":{"save":{"includeText":true},"change":2,"openClose":true},"codeLensProvider":{"resolveProvider":true},"workspace":{"workspaceFolders":{"changeNotifications":true,"supported":true}},"implementationProvider":true,"documentOnTypeFormattingProvider":{"moreTriggerCharacter":["}",")"],"firstTriggerCharacter":";"},"workspaceSymbolProvider":true,"documentRangeFormattingProvider":true,"semanticTokensProvider":{"legend":{"tokenTypes":["class","comment","constant","enumMember","enum","event","method","field","variable","interface","keyword","namespace","number","operator","parameter","property","struct","regex","string","typeParameter"],"tokenModifiers":["static"]},"range":true,"full":true},"typeHierarchyProvider":true,"documentFormattingProvider":true,"documentSymbolProvider":true,"renameProvider":{"prepareProvider":true},"completionProvider":{"resolveProvider":true,"triggerCharacters":[".","'"]}},"serverInfo":{"version":"0.25.0.0","name":"csharp-ls"}}},"request":{"id":1,"jsonrpc":"2.0","method":"initialize","params":{"rootUri":"file:///Users/shimanski/Projects/GitHub/apsp-problems/floyd-warshall","capabilities":{"workspace":{"workspaceFolders":false,"configuration":true,"symbol":{"dynamicRegistration":false},"applyEdit":true},"window":{"workDoneProgress":false},"textDocument":{"callHierarchy":{"dynamicRegistration":false},"rename":{"prepareSupport":true,"dynamicRegistration":false,"prepareSupportDefaultBehavior":1},"codeAction":{"isPreferredSupport":true,"disabledSupport":true,"codeActionLiteralSupport":{"codeActionKind":{"valueSet":["","quickfix","refactor","refactor.extract","refactor.inline","refactor.rewrite","source","source.organizeImports"]}},"dynamicRegistration":false},"completion":{"completionItem":{"insertReplaceSupport":true,"snippetSupport":false,"resolveSupport":{"properties":["additionalTextEdits","detail"]},"documentationFormat":["markdown","plaintext"]},"dynamicRegistration":false,"completionItemKind":{"valueSet":[10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,1,2,3,4,5,6,7,8,9]}},"formatting":{"dynamicRegistration":false},"codeLens":{"dynamicRegistration":false},"inlayHint":{"dynamicRegistration":false},"documentLink":{"dynamicRegistration":false},"hover":{"dynamicRegistration":false,"contentFormat":["markdown","plaintext"]},"rangeFormatting":{"dynamicRegistration":false},"declaration":{"dynamicRegistration":false,"linkSupport":true},"references":{"dynamicRegistration":false},"typeHierarchy":{"dynamicRegistration":false},"foldingRange":{"rangeLimit":5000,"dynamicRegistration":false,"lineFoldingOnly":true},"documentSymbol":{"symbolKind":{"valueSet":[10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,1,2,3,4,5,6,7,8,9]},"dynamicRegistration":false,"labelSupport":false,"hierarchicalDocumentSymbolSupport":false},"publishDiagnostics":{"relatedInformation":true},"synchronization":{"dynamicRegistration":false,"willSaveWaitUntil":false,"willSave":false,"didSave":true},"documentHighlight":{"dynamicRegistration":false},"implementation":{"dynamicRegistration":false,"linkSupport":true},"typeDefinition":{"dynamicRegistration":false,"linkSupport":true},"semanticTokens":{"serverCancelSupport":false,"requests":{"full":{"delta":true},"range":false},"multilineTokenSupport":false,"dynamicRegistration":false,"overlappingTokenSupport":false,"tokenTypes":["type","class","enum","interface","struct","typeParameter","parameter","variable","property","enumMember","event","function","method","macro","keyword","modifier","comment","string","number","regexp","operator"],"tokenModifiers":[],"formats":["relative"]},"signatureHelp":{"dynamicRegistration":false},"definition":{"dynamicRegistration":false,"linkSupport":true}}},"rootPath":"/Users/shimanski/Projects/GitHub/apsp-problems/floyd-warshall","clientInfo":{"name":"vim-lsp"},"processId":86000,"trace":"off"}}}]
Tue Jun 16 21:36:18 2026:["--->",7,"csharp-ls",{"method":"initialized","params":{}}]
Tue Jun 16 21:36:18 2026:[{"response":{"data":{"__data__":"vim-lsp","server_name":"csharp-ls"},"message":"configuration sent"}}]
Tue Jun 16 21:36:18 2026:["s:update_file_content()",5]
Tue Jun 16 21:36:18 2026:["--->",7,"csharp-ls",{"method":"textDocument/didOpen","params":{"textDocument":{"uri":"file:///Users/shimanski/Projects/GitHub/apsp-problems/floyd-warshall/src/Hardware/APSP04.cs","version":1,"languageId":"cs","text":"using System;\nusing System.Threading.Tasks;\nusing Hast.Layer;\nusing Hast.Transformer.SimpleMemory;\n\nnamespace Code.Hardware;\n\npublic class APSP04\n{\n  public virtual void ParallelOptimisation(SimpleMemory matrix, int sz)\n  {\n    for (var k = 0; k < sz; ++k)\n    {\n      Parallel.For(0, sz, i =>\n      {\n        for (var j = 0; j < sz; ++j)\n        {\n          var distance = matrix.ReadInt32(i * sz + k) + matrix.ReadInt32(k * sz + j);\n          if (matrix.ReadInt32(i * sz + j) > distance)\n          {\n            matrix.WriteInt32(i * sz + j, distance);\n          }\n        }\n      });\n    }\n  }\n\n  public void Run(int[] matrix, int sz, IHastlayer hastlayer = null, IHardwareGenerationConfiguration configuration = null)\n  {\n    var memory = hastlayer is null\n      ? SimpleMemory.CreateSoftwareMemory(matrix.Length)\n      : hastlayer.CreateMemory(configuration, matrix.Length);\n\n    for (var i = 0; i < matrix.Length; ++i)\n      memory.WriteInt32(i, matrix[i]);\n\n    ParallelOptimisation(memory, sz);\n\n    for (var i = 0; i < matrix.Length; ++i)\n      matrix[i] = memory.ReadInt32(i);\n  }\n}\n"}}}]
Tue Jun 16 21:36:18 2026:[{"response":{"data":{"__data__":"vim-lsp","server_name":"csharp-ls"},"message":"server already started"}}]
Tue Jun 16 21:36:18 2026:[{"response":{"data":{"__data__":"vim-lsp","init_result":{"id":1,"jsonrpc":"2.0","result":{"capabilities":{"documentHighlightProvider":true,"hoverProvider":true,"typeDefinitionProvider":true,"definitionProvider":true,"referencesProvider":true,"diagnosticProvider":{"workspaceDiagnostics":true,"interFileDependencies":false,"documentSelector":[{"pattern":"**/*.cs","language":"csharp","scheme":"file"}]},"inlayHintProvider":{"resolveProvider":false},"signatureHelpProvider":{"triggerCharacters":["(",",","<","{","["]},"foldingRangeProvider":true,"callHierarchyProvider":true,"codeActionProvider":{"resolveProvider":true},"textDocumentSync":{"save":{"includeText":true},"change":2,"openClose":true},"codeLensProvider":{"resolveProvider":true},"workspace":{"workspaceFolders":{"changeNotifications":true,"supported":true}},"implementationProvider":true,"documentOnTypeFormattingProvider":{"moreTriggerCharacter":["}",")"],"firstTriggerCharacter":";"},"workspaceSymbolProvider":true,"documentRangeFormattingProvider":true,"semanticTokensProvider":{"legend":{"tokenTypes":["class","comment","constant","enumMember","enum","event","method","field","variable","interface","keyword","namespace","number","operator","parameter","property","struct","regex","string","typeParameter"],"tokenModifiers":["static"]},"range":true,"full":true},"typeHierarchyProvider":true,"documentFormattingProvider":true,"documentSymbolProvider":true,"renameProvider":{"prepareProvider":true},"completionProvider":{"resolveProvider":true,"triggerCharacters":[".","'"]}},"serverInfo":{"version":"0.25.0.0","name":"csharp-ls"}}},"server_name":"csharp-ls"},"message":"lsp server already initialized"}}]
Tue Jun 16 21:36:18 2026:[{"response":{"data":{"__data__":"vim-lsp","server_name":"csharp-ls"},"message":"configuration sent"}}]
Tue Jun 16 21:36:18 2026:[{"response":{"data":{"path":"file:///Users/shimanski/Projects/GitHub/apsp-problems/floyd-warshall/src/Hardware/APSP04.cs","__data__":"vim-lsp","server_name":"csharp-ls"},"message":"already opened"}}]
Tue Jun 16 21:36:18 2026:[{"response":{"data":{"path":"file:///Users/shimanski/Projects/GitHub/apsp-problems/floyd-warshall/src/Hardware/APSP04.cs","__data__":"vim-lsp","server_name":"csharp-ls"},"message":"not dirty"}}]
Tue Jun 16 21:36:18 2026:["--->",7,"csharp-ls",{"method":"textDocument/foldingRange","on_notification":"---funcref---","bufnr":5,"params":{"textDocument":{"uri":"file:///Users/shimanski/Projects/GitHub/apsp-problems/floyd-warshall/src/Hardware/APSP04.cs"}},"sync":0}]
Tue Jun 16 21:36:18 2026:[{"response":{"data":{"path":"file:///Users/shimanski/Projects/GitHub/apsp-problems/floyd-warshall/src/Hardware/APSP04.cs","__data__":"vim-lsp","filetype":"cs","server_name":"csharp-ls"},"message":"textDocument/open sent"}}]
Tue Jun 16 21:36:18 2026:[{"response":{"data":{"path":"file:///Users/shimanski/Projects/GitHub/apsp-problems/floyd-warshall/src/Hardware/APSP04.cs","__data__":"vim-lsp","server_name":"csharp-ls"},"message":"not dirty"}}]
Tue Jun 16 21:36:18 2026:["<---","s:on_request",7,{"id":1,"jsonrpc":"2.0","method":"workspace/configuration","params":{"items":[{"section":"csharp"}]}}]
Tue Jun 16 21:36:18 2026:["--->",7,"csharp-ls",{"id":1,"result":[null]}]
Tue Jun 16 21:36:18 2026:["<---(stderr)",7,"csharp-ls","21:36:18.165 info: LifeCycle[0]\n      initialize: initial csharp config: { logLevel = Some \"info\"\n        applyFormattingOptions = None\n        analyzersEnabled = None\n        useMetadataUris = Some false\n        razorSupport = Some false\n        locale = None\n        debug = Some { solutionLoadDelay = None\n                       debugMode = Some false }\n        solutionPathOverride = None }\n"]
Tue Jun 16 21:36:18 2026:["<---",7,"csharp-ls",{"response":{"method":"window/logMessage","jsonrpc":"2.0","params":{"message":"csharp-ls: attempting to find and load solution on path \"/Users/shimanski/Projects/GitHub/apsp-problems/floyd-warshall\"..","type":3}}}]
Tue Jun 16 21:36:18 2026:["<---",7,"csharp-ls",{"response":{"method":"window/logMessage","jsonrpc":"2.0","params":{"message":"csharp-ls: 1 solution(s) found: [/Users/shimanski/Projects/GitHub/apsp-problems/floyd-warshall/Solution.sln]","type":3}}}]
Tue Jun 16 21:36:18 2026:["<---",7,"csharp-ls",{"response":{"method":"window/logMessage","jsonrpc":"2.0","params":{"message":"csharp-ls: Loading solution \"/Users/shimanski/Projects/GitHub/apsp-problems/floyd-warshall/Solution.sln\"...","type":3}}}]
Tue Jun 16 21:36:18 2026:["<---(stderr)",7,"csharp-ls","21:36:18.227 info: Roslyn.Solution[0]\n      Will use MSBuild props: map [(TargetFramework, net8.0)]\n"]
Tue Jun 16 21:36:18 2026:["<---",6,"csharp-ls",{"response":{"method":"textDocument/publishDiagnostics","jsonrpc":"2.0","params":{"uri":"file:///Users/shimanski/Projects/GitHub/apsp-problems/floyd-warshall/src/Utilz/Matrix.cs","diagnostics":[]}}}]
Tue Jun 16 21:36:18 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Tue Jun 16 21:36:19 2026:["s:update_file_content()",6]
Tue Jun 16 21:36:19 2026:["--->",8,"csharp-ls",{"method":"textDocument/didOpen","params":{"textDocument":{"uri":"file:///Users/shimanski/Projects/GitHub/apsp-problems/floyd-warshall/src/Utilz/Matrix.cs","version":1,"languageId":"cs","text":"using System;\nusing System.IO;\nusing System.Text.RegularExpressions;\n\nnamespace Code.Utilz;\n\npublic readonly partial struct Matrix\n{\n  public readonly struct Blocks\n  {\n    public const int NO_EDGE = Matrix.NO_EDGE;\n\n    public readonly int[] Data;\n    public readonly int Count;\n    public readonly int Size;\n\n    public Blocks(\n      int[] data,\n      int count,\n      int size)\n    {\n      this.Data = data;\n      this.Count = count;\n      this.Size = size; \n    }\n  }\n\n  public const int NO_EDGE = int.MaxValue / 2 - 1;\n\n  public readonly int[] Data;\n  public readonly int Size;\n\n  public Matrix(\n    int[] data,\n    int size)\n  {\n    this.Data = data;\n    this.Size = size;\n  }\n\n  [GeneratedRegex(\"(?<from>\\\\d+)\\\\s(?<to>\\\\d+)\\\\s(?<distance>\\\\d+)\")]\n  private static partial Regex ReadRegex();\n\n  public Blocks SplitInBlocks(\n    int size)\n  {\n    var count = this.Size / size;\n    if (this.Size % size != 0)\n    {\n      throw new InvalidOperationException(\"Can't split matrix into uneven blocks\");\n    }\n\n    var lineralBlockSize = size * size;\n    var lineralBlockRowSize = count * lineralBlockSize;\n\n    var blocks = new int[this.Size * this.Size];\n    for (var i = 0; i < this.Size; i++)\n    {\n      for (var j = 0; j < this.Size; j++)\n      {\n        var bI = i / size; var bJ = j / size;\n        var bX = i % size; var bY = j % size;\n\n        blocks[bI * lineralBlockRowSize + bJ * lineralBlockSize + bX * size + bY] = this.Data[i * this.Size + j];\n      }\n    }\n    Array.Copy(blocks, this.Data, this.Size * this.Size);\n\n    return new Blocks(this.Data, count, size);\n  }\n\n  public void JoinFromBlocks(\n    Blocks blocks)\n  {\n    if (blocks.Data != this.Data)\n    {\n      throw new ArgumentException(\"Unable to assemble matrix from blocks of different matrix\");\n    }\n\n    var lineralBlockSize = blocks.Size * blocks.Size;\n    var lineralBlockRowSize = blocks.Count * lineralBlockSize;\n\n    var data = new int[this.Data.Length];\n    for (var i = 0; i < this.Size; i++)\n    {\n      for (var j = 0; j < this.Size; j++)\n      {\n        var bI = i / blocks.Size; var bJ = j / blocks.Size;\n        var bX = i % blocks.Size; var bY = j % blocks.Size;\n\n        data[i * this.Size + j] = blocks.Data[bI * lineralBlockRowSize + bJ * lineralBlockSize + bX * blocks.Size + bY];\n      }\n    }\n    Array.Copy(data, blocks.Data, data.Length);\n  }\n\n  public static Matrix Default(\n    int size)\n  {\n    var data = new int[size * size];\n    Array.Fill(data, NO_EDGE);\n\n    return new Matrix(data, size);\n  }\n\n  public static Matrix Copy(\n    Matrix matrix)\n  {\n    var data = new int[matrix.Size * matrix.Size];\n\n    Array.Copy(matrix.Data, data, data.Length);\n\n    return new Matrix(data, matrix.Size);\n  }\n\n  public static Matrix Read(\n    Stream stream)\n  {\n    if (stream is null)\n    {\n      throw new ArgumentNullException(nameof(stream));\n    }\n\n    using var input = new StreamReader(stream, leaveOpen: true);\n\n    var line = input.ReadLine();\n    if (!int.TryParse(line, out var size))\n      throw new Exception($\"Unexpected start of stream, expected <number> as the first value from stream but got: '{line}'\");\n\n    var data = new int[size * size];\n\n    // Fill the whole data with NO_EDGE values\n    // because we are reading only existing edges\n    //\n    Array.Fill(data, NO_EDGE);\n\n    while ((line = input.ReadLine()) is not null)\n    {\n      var match = ReadRegex().Match(line);\n      if (!match.Success)\n        throw new Exception($\"Unexpected value, expected value in <from> <to> <distance> format but got: '{line}'\");\n\n      var from = int.Parse(match.Groups[\"from\"].ValueSpan);\n      var to = int.Parse(match.Groups[\"to\"].ValueSpan);\n      var distance = int.Parse(match.Groups[\"distance\"].ValueSpan);\n\n      data[from * size + to] = distance;\n    }\n    return new Matrix(data, size);\n  }\n\n  public static void Write(\n    Stream stream,\n    Matrix matrix)\n  {\n    if (stream is null)\n    {\n      throw new ArgumentNullException(nameof(stream));\n    }\n\n    using var output = new StreamWriter(stream, leaveOpen: true);\n\n    output.WriteLine(matrix.Size);\n\n    for (int i = 0; i < matrix.Size; i++)\n    {\n      for (int j = 0; j < matrix.Size; j++)\n      {\n        if (matrix.Data[i * matrix.Size + j] != NO_EDGE)\n        {\n          output.WriteLine($\"{i} {j} {matrix.Data[i * matrix.Size + j]}\");\n        }\n      }\n    }\n  }\n}\n"}}}]
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Tue Jun 16 21:36:20 2026:["<---",7,"csharp-ls",{"response":{"method":"textDocument/publishDiagnostics","jsonrpc":"2.0","params":{"uri":"file:///Users/shimanski/Projects/GitHub/apsp-problems/floyd-warshall/src/Hardware/APSP04.cs","diagnostics":[{"source":"lsp","range":{"end":{"character":13,"line":0},"start":{"character":0,"line":0}},"code":"CS8019","message":"Unnecessary using directive.","codeDescription":{"href":"https://msdn.microsoft.com/query/roslyn.query?appId=roslyn&k=k(CS8019)"},"severity":2}]}}}]
Tue Jun 16 21:36:21 2026:["<---",8,"csharp-ls",{"response":{"method":"window/logMessage","jsonrpc":"2.0","params":{"message":"csharp-ls: Finished loading solution \"/Users/shimanski/Projects/GitHub/apsp-problems/floyd-warshall/Solution.sln\"","type":3}}}]
Tue Jun 16 21:36:21 2026:["<---",8,"csharp-ls",{"response":{"id":2,"jsonrpc":"2.0","result":[{"startLine":0,"kind":"imports","endLine":2},{"startLine":6,"endLine":175},{"startLine":8,"endLine":25},{"startLine":16,"endLine":24},{"startLine":32,"endLine":38},{"startLine":40,"endLine":41},{"startLine":43,"endLine":69},{"startLine":71,"endLine":94},{"startLine":96,"endLine":103},{"startLine":105,"endLine":113},{"startLine":115,"endLine":149},{"startLine":151,"endLine":174}]},"request":{"id":2,"jsonrpc":"2.0","method":"textDocument/foldingRange","params":{"textDocument":{"uri":"file:///Users/shimanski/Projects/GitHub/apsp-problems/floyd-warshall/src/Utilz/Matrix.cs"}}}}]
Tue Jun 16 21:36:21 2026:["lsp#register_server","server already registered","csharp-ls"]
Tue Jun 16 21:36:21 2026:["lsp#register_server","server registered","csharp-ls"]
Tue Jun 16 21:36:21 2026:["s:on_text_document_did_open()",5,"cs","/Users/shimanski/Projects/GitHub/apsp-problems/floyd-warshall","file:///Users/shimanski/Projects/GitHub/apsp-problems/floyd-warshall/src/Hardware/APSP04.cs"]
Tue Jun 16 21:36:21 2026:["Starting server","csharp-ls",["csharp-ls"]]
Tue Jun 16 21:36:21 2026:[{"response":{"data":{"__data__":"vim-lsp","lsp_id":9,"server_name":"csharp-ls"},"message":"started lsp server successfully"}}]
Tue Jun 16 21:36:21 2026:["--->",9,"csharp-ls",{"method":"initialize","params":{"rootUri":"file:///Users/shimanski/Projects/GitHub/apsp-problems/floyd-warshall","capabilities":{"workspace":{"workspaceFolders":false,"configuration":true,"symbol":{"dynamicRegistration":false},"applyEdit":true},"window":{"workDoneProgress":false},"textDocument":{"callHierarchy":{"dynamicRegistration":false},"rename":{"prepareSupport":true,"dynamicRegistration":false,"prepareSupportDefaultBehavior":1},"codeAction":{"isPreferredSupport":true,"disabledSupport":true,"codeActionLiteralSupport":{"codeActionKind":{"valueSet":["","quickfix","refactor","refactor.extract","refactor.inline","refactor.rewrite","source","source.organizeImports"]}},"dynamicRegistration":false},"completion":{"completionItem":{"insertReplaceSupport":true,"snippetSupport":false,"resolveSupport":{"properties":["additionalTextEdits","detail"]},"documentationFormat":["markdown","plaintext"]},"dynamicRegistration":false,"completionItemKind":{"valueSet":[10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,1,2,3,4,5,6,7,8,9]}},"formatting":{"dynamicRegistration":false},"codeLens":{"dynamicRegistration":false},"inlayHint":{"dynamicRegistration":false},"documentLink":{"dynamicRegistration":false},"hover":{"dynamicRegistration":false,"contentFormat":["markdown","plaintext"]},"rangeFormatting":{"dynamicRegistration":false},"declaration":{"dynamicRegistration":false,"linkSupport":true},"references":{"dynamicRegistration":false},"typeHierarchy":{"dynamicRegistration":false},"foldingRange":{"rangeLimit":5000,"dynamicRegistration":false,"lineFoldingOnly":true},"documentSymbol":{"symbolKind":{"valueSet":[10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,1,2,3,4,5,6,7,8,9]},"dynamicRegistration":false,"labelSupport":false,"hierarchicalDocumentSymbolSupport":false},"publishDiagnostics":{"relatedInformation":true},"synchronization":{"dynamicRegistration":false,"willSaveWaitUntil":false,"willSave":false,"didSave":true},"documentHighlight":{"dynamicRegistration":false},"implementation":{"dynamicRegistration":false,"linkSupport":true},"typeDefinition":{"dynamicRegistration":false,"linkSupport":true},"semanticTokens":{"serverCancelSupport":false,"requests":{"full":{"delta":true},"range":false},"multilineTokenSupport":false,"dynamicRegistration":false,"overlappingTokenSupport":false,"tokenTypes":["type","class","enum","interface","struct","typeParameter","parameter","variable","property","enumMember","event","function","method","macro","keyword","modifier","comment","string","number","regexp","operator"],"tokenModifiers":[],"formats":["relative"]},"signatureHelp":{"dynamicRegistration":false},"definition":{"dynamicRegistration":false,"linkSupport":true}}},"rootPath":"/Users/shimanski/Projects/GitHub/apsp-problems/floyd-warshall","clientInfo":{"name":"vim-lsp"},"processId":86000,"trace":"off"}}]
Tue Jun 16 21:36:21 2026:["<---(stderr)",9,"csharp-ls","21:36:21.751 info: LifeCycle[0]\n      initializing, csharp-ls version 0.25.0 (Punia)+19a9574d7577521555f49bf49e94688a3ba67dd2\n"]
Tue Jun 16 21:36:21 2026:["<---",9,"csharp-ls",{"response":{"method":"window/logMessage","jsonrpc":"2.0","params":{"message":"csharp-ls: initializing, version 0.25.0 (Punia)+19a9574d7577521555f49bf49e94688a3ba67dd2","type":3}}}]
Tue Jun 16 21:36:21 2026:["<---",9,"csharp-ls",{"response":{"method":"window/logMessage","jsonrpc":"2.0","params":{"message":"csharp-ls: csharp-ls is released under MIT license and is not affiliated with Microsoft Corp.; see https://github.com/razzmatazz/csharp-language-server","type":3}}}]
Tue Jun 16 21:36:21 2026:["<---(stderr)",9,"csharp-ls","21:36:21.777 info: LifeCycle[0]\n      csharp-ls is released under MIT license and is not affiliated with Microsoft Corp.; see https://github.com/razzmatazz/csharp-language-server\n"]
Tue Jun 16 21:36:21 2026:["<---(stderr)",9,"csharp-ls","21:36:21.788 info: Roslyn.Solution[0]\n      SDK instances found, as reported by MSBuild:\n      - SDK=\".NET Core SDK\", Version=10.0.301, MSBuildPath=\"/usr/local/share/dotnet/sdk/10.0.301\", DiscoveryType=DotNetSdk\n      - SDK=\".NET Core SDK\", Version=9.0.306, MSBuildPath=\"/usr/local/share/dotnet/sdk/9.0.306\", DiscoveryType=DotNetSdk\n"]
Tue Jun 16 21:36:21 2026:["<---(stderr)",9,"csharp-ls","21:36:21.789 info: Roslyn.Solution[0]\n      MSBuildLocator: will register \".NET Core SDK\", Version=10.0.301 as default instance\n"]
Tue Jun 16 21:36:21 2026:["<---(stderr)",9,"csharp-ls","21:36:21.806 info: LifeCycle[0]\n      handleInitialize: using workspaceFolders: [{\"uri\":\"file:///Users/shimanski/Projects/GitHub/apsp-problems/floyd-warshall\",\"name\":\"root\"}]\n"]
Tue Jun 16 21:36:21 2026:["<---",9,"csharp-ls",{"response":{"id":1,"jsonrpc":"2.0","result":{"capabilities":{"documentHighlightProvider":true,"hoverProvider":true,"typeDefinitionProvider":true,"definitionProvider":true,"referencesProvider":true,"diagnosticProvider":{"workspaceDiagnostics":true,"interFileDependencies":false,"documentSelector":[{"pattern":"**/*.cs","language":"csharp","scheme":"file"}]},"inlayHintProvider":{"resolveProvider":false},"signatureHelpProvider":{"triggerCharacters":["(",",","<","{","["]},"foldingRangeProvider":true,"callHierarchyProvider":true,"codeActionProvider":{"resolveProvider":true},"textDocumentSync":{"save":{"includeText":true},"change":2,"openClose":true},"codeLensProvider":{"resolveProvider":true},"workspace":{"workspaceFolders":{"changeNotifications":true,"supported":true}},"implementationProvider":true,"documentOnTypeFormattingProvider":{"moreTriggerCharacter":["}",")"],"firstTriggerCharacter":";"},"workspaceSymbolProvider":true,"documentRangeFormattingProvider":true,"semanticTokensProvider":{"legend":{"tokenTypes":["class","comment","constant","enumMember","enum","event","method","field","variable","interface","keyword","namespace","number","operator","parameter","property","struct","regex","string","typeParameter"],"tokenModifiers":["static"]},"range":true,"full":true},"typeHierarchyProvider":true,"documentFormattingProvider":true,"documentSymbolProvider":true,"renameProvider":{"prepareProvider":true},"completionProvider":{"resolveProvider":true,"triggerCharacters":[".","'"]}},"serverInfo":{"version":"0.25.0.0","name":"csharp-ls"}}},"request":{"id":1,"jsonrpc":"2.0","method":"initialize","params":{"rootUri":"file:///Users/shimanski/Projects/GitHub/apsp-problems/floyd-warshall","capabilities":{"workspace":{"workspaceFolders":false,"configuration":true,"symbol":{"dynamicRegistration":false},"applyEdit":true},"window":{"workDoneProgress":false},"textDocument":{"callHierarchy":{"dynamicRegistration":false},"rename":{"prepareSupport":true,"dynamicRegistration":false,"prepareSupportDefaultBehavior":1},"codeAction":{"isPreferredSupport":true,"disabledSupport":true,"codeActionLiteralSupport":{"codeActionKind":{"valueSet":["","quickfix","refactor","refactor.extract","refactor.inline","refactor.rewrite","source","source.organizeImports"]}},"dynamicRegistration":false},"completion":{"completionItem":{"insertReplaceSupport":true,"snippetSupport":false,"resolveSupport":{"properties":["additionalTextEdits","detail"]},"documentationFormat":["markdown","plaintext"]},"dynamicRegistration":false,"completionItemKind":{"valueSet":[10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,1,2,3,4,5,6,7,8,9]}},"formatting":{"dynamicRegistration":false},"codeLens":{"dynamicRegistration":false},"inlayHint":{"dynamicRegistration":false},"documentLink":{"dynamicRegistration":false},"hover":{"dynamicRegistration":false,"contentFormat":["markdown","plaintext"]},"rangeFormatting":{"dynamicRegistration":false},"declaration":{"dynamicRegistration":false,"linkSupport":true},"references":{"dynamicRegistration":false},"typeHierarchy":{"dynamicRegistration":false},"foldingRange":{"rangeLimit":5000,"dynamicRegistration":false,"lineFoldingOnly":true},"documentSymbol":{"symbolKind":{"valueSet":[10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,1,2,3,4,5,6,7,8,9]},"dynamicRegistration":false,"labelSupport":false,"hierarchicalDocumentSymbolSupport":false},"publishDiagnostics":{"relatedInformation":true},"synchronization":{"dynamicRegistration":false,"willSaveWaitUntil":false,"willSave":false,"didSave":true},"documentHighlight":{"dynamicRegistration":false},"implementation":{"dynamicRegistration":false,"linkSupport":true},"typeDefinition":{"dynamicRegistration":false,"linkSupport":true},"semanticTokens":{"serverCancelSupport":false,"requests":{"full":{"delta":true},"range":false},"multilineTokenSupport":false,"dynamicRegistration":false,"overlappingTokenSupport":false,"tokenTypes":["type","class","enum","interface","struct","typeParameter","parameter","variable","property","enumMember","event","function","method","macro","keyword","modifier","comment","string","number","regexp","operator"],"tokenModifiers":[],"formats":["relative"]},"signatureHelp":{"dynamicRegistration":false},"definition":{"dynamicRegistration":false,"linkSupport":true}}},"rootPath":"/Users/shimanski/Projects/GitHub/apsp-problems/floyd-warshall","clientInfo":{"name":"vim-lsp"},"processId":86000,"trace":"off"}}}]
Tue Jun 16 21:36:21 2026:["--->",9,"csharp-ls",{"method":"initialized","params":{}}]
Tue Jun 16 21:36:21 2026:[{"response":{"data":{"__data__":"vim-lsp","server_name":"csharp-ls"},"message":"configuration sent"}}]

Activity

  1. OlegKarasik commented on Jun 22, 2026

    @OlegKarasik
    OlegKarasik
    on Jun 22, 2026
    Author

    If someone is interested, I was able to find a partial solution to the above problem by updating my registration code to:

    if executable('csharp-ls')
  let g:lsp_setup_called_cs = []

  function! HandleLspSetup()
    let root = lsp#utils#path_to_uri(
      \   lsp#utils#find_nearest_parent_file_directory(
      \     lsp#utils#get_buffer_path(),
      \     ['*.sln', '*.csproj', '.git', '.git/']
      \   )
      \ )

    if index(g:lsp_setup_called_cs, root) < 0
      call lsp#register_server({
        \ 'name': 'csharp-ls',
        \ 'cmd': {server_info->['csharp-ls', '--features', 'metadata-uris']},
        \ 'allowlist': ['cs'],
        \ 'root_uri': {server_info->root},
        \ 'config': {},
        \ 'workspace_config': {},
        \ })

      call add(g:lsp_setup_called_cs, root)
    endif
  endfunction

  au User lsp_setup call HandleLspSetup()
endif

    There are two issues here - this registration bloats the .vimrc (a minor one) an it never unregisters the LSP when all buffers from a particular directory are unregistered. Maybe I will come up with the solution to these two also a bit later.

    Leaving this issue open, so maybe maintainers can advise something better, or maybe some of the things can be contributed somewhere.

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