x/tools/gopls: Error loading workspace folders (expected 1, got 0)

[chaudum]

What version of Go are you using (go version)?

$ go version
go version go1.15.7 linux/amd64

Does this issue reproduce with the latest release?

Yes

$ gopls version
golang.org/x/tools/gopls v0.6.5
    golang.org/x/tools/gopls@v0.6.5 h1:kLt9rD/dWtVdvc8LmdcxagDFih6zxYXREpKSYYZu5KE=

What operating system and processor architecture are you using (go env)?

go env Output

$ go env
GO111MODULE="on"
GOARCH="amd64"
GOBIN=""
GOCACHE="/home/christian/.cache/go-build"
GOENV="/home/christian/.config/go/env"
GOEXE=""
GOFLAGS=""
GOHOSTARCH="amd64"
GOHOSTOS="linux"
GOINSECURE=""
GOMODCACHE="/home/christian/go/pkg/mod"
GONOPROXY=""
GONOSUMDB=""
GOOS="linux"
GOPATH="/home/christian/go"
GOPRIVATE=""
GOPROXY="https://proxy.golang.org,direct"
GOROOT="/usr/lib/go"
GOSUMDB="sum.golang.org"
GOTMPDIR=""
GOTOOLDIR="/usr/lib/go/pkg/tool/linux_amd64"
GCCGO="gccgo"
AR="ar"
CC="gcc"
CXX="g++"
CGO_ENABLED="1"
GOMOD="/home/christian/sandbox/chaudum/golang/go.mod"
CGO_CFLAGS="-g -O2"
CGO_CPPFLAGS=""
CGO_CXXFLAGS="-g -O2"
CGO_FFLAGS="-g -O2"
CGO_LDFLAGS="-g -O2"
PKG_CONFIG="pkg-config"
GOGCCFLAGS="-fPIC -m64 -pthread -fmessage-length=0 -fdebug-prefix-map=/tmp/go-build961008458=/tmp/go-build -gno-record-gcc-switches"

What did you do?

I installed gopls via go get, and configured it via nvim-lspconfig:

  lspconfig.gopls.setup{
    cmd = {
      '/home/christian/go/bin/gopls',
      '-v',
      '-rpc.trace',
      '-logfile=/home/christian/gopls.log',
    };
    settings = {
      gopls = {
        -- experimentalWorkspaceModule = true
        -- expandWorkspaceToModule = true,
        analyses = {
          unusedparams = true,
        },
        staticcheck = true,
        codelenses = {
          gc_details = true,
        }
      },
    }

What did you expect to see?

gopls works without errors.

What did you see instead?

Neovim prints an error when opening the file test.go and language server does not do anything.

LSP[gopls] Error loading workspace folders (expected 1, got 0)
failed to load view for file:///home/christian/sandbox/chaudum/golang: failed to get workspace configuration from client (file:///home/christian/sandbox/chaudum/golang): MethodNotFound

gopls logs

cat gopls.log Output

$ cat gopls.log
$ cat gopls.log                                                
[Trace - 11:11:58.190 AM] Sending request 'initialize - (1)'.
Params: {"rootUri": "file:///home/christian/sandbox/chaudum/golang", "initializationOptions": {}, "workspaceFolders": [{"uri": "file:///home/christian/sandbox/chaudum/golang", "name": "/home/christian/sandbox/chaudum/golang"}], "rootPath": "/home/christian/sandbox/chaudum/golang", "processId": 3179162, "trace": "off", "capabilities": {"window": {"workDoneProgress": true}, "workspace": {"workspaceFolders": true, "configuration": true, "symbol": {"symbolKind": {"valueSet": [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26]}, "dynamicRegistration": false, "hierarchicalWorkspaceSymbolSupport": true}, "applyEdit": true}, "callHierarchy": {"dynamicRegistration": false}, "textDocument": {"implementation": {"linkSupport": true}, "documentSymbol": {"symbolKind": {"valueSet": [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26]}, "dynamicRegistration": false, "hierarchicalDocumentSymbolSupport": true}, "references": {"dynamicRegistration": false}, "signatureHelp": {"signatureInformation": {"documentationFormat": ["markdown", "plaintext"]}, "dynamicRegistration": false}, "rename": {"prepareSupport": true, "dynamicRegistration": false}, "definition": {"linkSupport": true}, "completion": {"completionItem": {"snippetSupport": false, "commitCharactersSupport": false, "preselectSupport": false, "deprecatedSupport": false, "documentationFormat": ["markdown", "plaintext"]}, "contextSupport": false, "dynamicRegistration": false, "completionItemKind": {"valueSet": [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25]}}, "codeAction": {"codeActionLiteralSupport": {"codeActionKind": {"valueSet": ["", "Empty", "QuickFix", "Refactor", "RefactorExtract", "RefactorInline", "RefactorRewrite", "Source", "SourceOrganizeImports", "quickfix", "refactor", "refactor.extract", "refactor.inline", "refactor.rewrite", "source", "source.organizeImports"]}}, "dynamicRegistration": false}, "documentHighlight": {"dynamicRegistration": false}, "hover": {"dynamicRegistration": false, "contentFormat": ["markdown", "plaintext"]}, "synchronization": {"didSave": true, "willSaveWaitUntil": false, "willSave": false, "dynamicRegistration": false}, "declaration": {"linkSupport": true}, "typeDefinition": {"linkSupport": true}}}}
[Trace - 11:11:58.191 AM] Received response 'initialize - (1)' in 0ms.

Result: {"capabilities":{"textDocumentSync":{"openClose":true,"change":2,"save":{}},"completionProvider":{"triggerCharacters":["."]},"hoverProvider":true,"signatureHelpProvider":{"triggerCharacters":["(",","]},"definitionProvider":true,"typeDefinitionProvider":true,"implementationProvider":true,"referencesProvider":true,"documentHighlightProvider":true,"documentSymbolProvider":true,"codeActionProvider":{"codeActionKinds":["quickfix","refactor.extract","refactor.rewrite","source.fixAll","source.organizeImports"]},"codeLensProvider":{},"documentLinkProvider":{},"workspaceSymbolProvider":true,"documentFormattingProvider":true,"documentOnTypeFormattingProvider":{"firstTriggerCharacter":""},"renameProvider":{"prepareProvider":true},"foldingRangeProvider":true,"executeCommandProvider":{"commands":["gopls.generate","gopls.fill_struct","gopls.regenerate_cgo","gopls.test","gopls.tidy","gopls.update_go_sum","gopls.undeclared_name","gopls.go_get_package","gopls.check_upgrades","gopls.add_dependency","gopls.upgrade_dependency","gopls.remove_dependency","gopls.vendor","gopls.extract_variable","gopls.extract_function","gopls.gc_details","gopls.generate_gopls_mod"]},"callHierarchyProvider":true,"workspace":{"workspaceFolders":{"supported":true,"changeNotifications":"workspace/didChangeWorkspaceFolders"}}},"serverInfo":{"name":"gopls","version":"{"path":"golang.org/x/tools/gopls","version":"v0.6.5","sum":"h1:kLt9rD/dWtVdvc8LmdcxagDFih6zxYXREpKSYYZu5KE=","deps":[{"path":"github.com/BurntSushi/toml","version":"v0.3.1","sum":"h1:WXkYYl6Yr3qBf1K79EBnL4mak0OimBfB0XUf9Vl28OQ="},{"path":"github.com/google/go-cmp","version":"v0.5.4","sum":"h1:L8R9j+yAqZuZjsqh/z+F1NCffTKKLShY6zXTItVIZ8M="},{"path":"github.com/sergi/go-diff","version":"v1.1.0","sum":"h1:we8PVUC3FE2uYfodKH/nBHMSetSfHDR6scGdBi+erh0="},{"path":"golang.org/x/mod","version":"v0.4.0","sum":"h1:8pl+sMODzuvGJkmj2W4kZihvVb5mKm8pB/X44PIQHv8="},{"path":"golang.org/x/sync","version":"v0.0.0-20201020160332-67f06af15bc9","sum":"h1:SQFwaSi55rU7vdNs9Yr0Z324VNlrF+0wMqRXT4St8ck="},{"path":"golang.org/x/sys","version":"v0.0.0-20210119212857-b64e53b001e4","sum":"h1:myAQVi0cGEoqQVR5POX+8RR2mrocKqNN1hmeMqhX27k="},{"path":"golang.org/x/tools","version":"v0.1.1-0.20210201201750-4d4ee958a9b7","sum":"h1:/wdPW261t381NDQd8TBo63/FyvACfLICwtH8wMRoHJQ="},{"path":"golang.org/x/xerrors","version":"v0.0.0-20200804184101-5ec99f83aff1","sum":"h1:go1bK/D/BFZV2I8cIQd1NKEZ+0owSTG1fDTci4IqFcE="},{"path":"honnef.co/go/tools","version":"v0.0.1-2020.1.6","sum":"h1:W18jzjh8mfPez+AwGLxmOImucz/IFjpNlrKVnaj2YVc="},{"path":"mvdan.cc/gofumpt","version":"v0.1.0","sum":"h1:hsVv+Y9UsZ/mFZTxJZuHVI6shSQCtzZ11h1JEFPAZLw="},{"path":"mvdan.cc/xurls/v2","version":"v2.2.0","sum":"h1:NSZPykBXJFCetGZykLAxaL6SIpvbVy/UFEniIfHAa8A="}]}"}}
[Trace - 11:11:58.191 AM] Sending notification 'initialized'.

Params: {}
[Trace - 11:11:58.191 AM] Sending notification 'workspace/didChangeConfiguration'.

Params: {"settings": {"gopls": {"expandWorkspaceToModule": false, "staticcheck": true, "analyses": {"unusedparams": true}, "codelenses": {"gc_details": true}, "experimentalWorkspaceModule": false}}}
[Trace - 11:11:58.192 AM] Sending notification 'textDocument/didOpen'.

Params: {"textDocument": {"uri": "file:///home/christian/sandbox/chaudum/golang/test.go", "version": 0, "languageId": "go", "text": "package main\n\nimport {\n    "fmt"\n}\n\nfunc main() {\n    fmt.Println("Hello gopls!")\n}\n"}}
[Trace - 11:11:58.192 AM] Received request 'window/workDoneProgress/create - (1)'.

Params: {"token":"5577006791947779410"}
[Error - Sent] 11:11:58.192 AM #1 MethodNotFound
[Trace - 11:11:58.192 AM] Received request 'workspace/configuration - (2)'.

Params: {"items":[{"scopeUri":"file:///home/christian/sandbox/chaudum/golang","section":"gopls"}]}
[Trace - 11:11:58.192 AM] Received notification 'window/logMessage'.

Params: {"type":1,"message":"2021/02/05 11:11:58 starting work for Setting up workspace: MethodNotFound\n"}
[Error - Sent] 11:11:58.192 AM #2 MethodNotFound
[Trace - 11:11:58.192 AM] Received notification 'window/showMessage'.

Params: {"type":1,"message":"Error loading workspace folders (expected 1, got 0)\nfailed to load view for file:///home/christian/sandbox/chaudum/golang: failed to get workspace configuration from client (file:///home/christian/sandbox/chaudum/golang): MethodNotFound\n"}
[Trace - 11:11:58.193 AM] Received request 'workspace/configuration - (3)'.

Params: {"items":[{"section":"gopls"}]}
[Error - Sent] 11:11:59.737 AM #3 MethodNotFound
[Trace - 11:11:59.738 AM] Received request 'window/workDoneProgress/create - (4)'.

Params: {"token":"8674665223082153551"}
[Error - Sent] 11:11:59.740 AM #4 MethodNotFound
[Trace - 11:11:59.740 AM] Received notification 'window/logMessage'.

Params: {"type":1,"message":"2021/02/05 11:11:59 starting work for Setting up workspace: MethodNotFound\n"}
[Trace - 11:11:59.740 AM] Received request 'workspace/configuration - (5)'.

Params: {"items":[{"scopeUri":"file:///home/christian/sandbox/chaudum/golang","section":"gopls"}]}
[Error - Sent] 11:11:59.743 AM #5 MethodNotFound
[Trace - 11:11:59.743 AM] Received notification 'window/showMessage'.

Params: {"type":1,"message":"Error loading workspace folders (expected 1, got 0)\nfailed to load view for file:///home/christian/sandbox/chaudum/golang: failed to get workspace configuration from client (file:///home/christian/sandbox/chaudum/golang): MethodNotFound\n"}
[Trace - 11:12:04.995 AM] Sending notification 'textDocument/didSave'.

Params: {"textDocument": {"uri": "file:///home/christian/sandbox/chaudum/golang/test.go"}}
[Trace - 11:12:04.995 AM] Sending request 'shutdown - (2)'.

Params:
[Trace - 11:12:04.996 AM] Received response 'shutdown - (2)' in 0ms.

Result: null
[Trace - 11:12:04.996 AM] Received notification 'window/logMessage'.

Params: {"type":3,"message":"2021/02/05 11:12:04 Shutdown session\n\tshutdown_session=1\n"}
[Trace - 11:12:04.997 AM] Sending notification 'exit'.

Params:

[stamblerre]

It looks like this Vim client may not support the workspace/configuration request, which is surprising because it's been a part of the protocol for a long time. I think it makes more sense to report this problem to the Vim client, as I don't think this is a gopls bug.

[chaudum]

Hi @stamblerre Thanks for the quick reply. Installing the latest Neovim nightly did really solve the problem (probably because of neovim/neovim@48caf1d).