Go: x/tools/gopls: comments duplicated with CRLF files

[fonini]

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

$ go version
go version go1.15.5 windows/amd64

Does this issue reproduce with the latest release?

Yes

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

go env Output

$ go env

set GO111MODULE=

set GOARCH=amd64

set GOBIN=

set GOCACHE=C:UsersUserAppDataLocalgo-build

set GOENV=C:UsersUserAppDataRoaminggoenv

set GOEXE=.exe

set GOFLAGS=

set GOHOSTARCH=amd64

set GOHOSTOS=windows

set GOINSECURE=

set GOMODCACHE=C:projetospkgmod

set GOOS=windows

set GOPATH=C:projetos

set GOPROXY=https://proxy.golang.org,direct

set GOROOT=C:Go

set GOSUMDB=sum.golang.org

set GOTMPDIR=

set GOTOOLDIR=C:Gopkgtoolwindows_amd64

set GCCGO=gccgo

set AR=ar

set CC=gcc

set CXX=g++

set CGO_ENABLED=1

set GOMOD=C:projetossrctest-apigo.mod

set CGO_CFLAGS=-g -O2

set CGO_CPPFLAGS=

set CGO_CXXFLAGS=-g -O2

set CGO_FFLAGS=-g -O2

set CGO_LDFLAGS=-g -O2

set PKG_CONFIG=pkg-config

set GOGCCFLAGS=-m64 -mthreads -fmessage-length=0 -fdebug-prefix-map=C:UsersUserAppDataLocalTempgo-build232461266=/tmp/go-build -gno-record-gcc-switches

What did you do?

I'm using VSCode with the latest gopls (0.5.4).
When I save a Go file in the VScode editor (Windows with CRLF), the comment section is getting duplicated.

What did you expect to see?

The file to be saved correctly.

What did you see instead?

The comment section being duplicated.

[tomqwpl]

Also see this issue. I think I upgraded the language server in the last couple of days, not sure how I tell what version I'm running.

[fonini]

@tomqwpl You can run gopls version

[tomqwpl]

Running that in a terminal window within VSCode gives:

  golang.org/x/tools/gopls v0.5.4
      golang.org/x/tools/[email protected] h1:PkQWDfzw8CxoseHDQniF2GhzmndN8KnQL6gcG2gnF3Y=

What I wasn't sure about was whether this was what was being used by VSCode.

[hyangah]

@tomqwpl The easiest is to check from the UI (https://github.com/golang/vscode-go/blob/master/docs/ui.md#language-server-status). Another way is to check Go: Locate Configured Go Tools output to find the path to the gopls binary.

[tomqwpl]

Go: Locate Configured Go Tools produces nothing in the output, but clicking on the go version number in the status bar brings up a menu with "open gopls trace v0.5.4", so that appears to be what I have. Which makes sense, since I upgraded a couple of days ago after a prompt.

I don't always see these symptoms. And when I do, changing the comment to be a single line, rather than a multi line comment makes it go away.

For example, right now I have this:

// Config describes a common configuration block
// for a database connection
type Config struct {
    // Type is the type of database. Currently supported database types
    // are:
    //   postgres
    Type   string      `json:"type"`
    Config StoreConfig `json:"config"`
}

If I press save, the "for a database connection" line is duplicated, so I get two copies. Press save again, and the whole thing is duplicated, so I have 4 copies of that line, and so on. The first line is not duplicated.
Change that to a single line comment and the problem goes away.

[hyangah]

I confirm this is reproducible with the latest version of gopls (v0.5.4)

gopls log

[Trace - 10:44:19.788 AM] Received notification 'window/logMessage'.
Params: {"type":3,"message":"2020/12/02 10:44:19 Shutdown session\n\tshutdown_session=1\n"}


[Trace - 10:44:19.863 AM] Sending request 'initialize - (0)'.
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[Trace - 10:44:19.863 AM] Received response 'initialize - (0)' 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.undeclared_name","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\":\"v0.5.4\",\"sum\":\"h1:PkQWDfzw8CxoseHDQniF2GhzmndN8KnQL6gcG2gnF3Y=\",\"deps\":[{\"path\":\"github.com/BurntSushi/toml\",\"version\":\"v0.3.1\",\"sum\":\"h1:WXkYYl6Yr3qBf1K79EBnL4mak0OimBfB0XUf9Vl28OQ=\"},{\"path\":\"github.com/google/go-cmp\",\"version\":\"v0.5.1\",\"sum\":\"h1:JFrFEBb2xKufg6XkJsJr+WbKb4FQlURi5RUcBveYu9k=\"},{\"path\":\"github.com/sergi/go-diff\",\"version\":\"v1.1.0\",\"sum\":\"h1:we8PVUC3FE2uYfodKH/nBHMSetSfHDR6scGdBi+erh0=\"},{\"path\":\"golang.org/x/mod\",\"version\":\"v0.3.0\",\"sum\":\"h1:RM4zey1++hCTbCVQfnWeKs9/IEsaBLA8vTkd0WVtmH4=\"},{\"path\":\"golang.org/x/sync\",\"version\":\"v0.0.0-20201020160332-67f06af15bc9\",\"sum\":\"h1:SQFwaSi55rU7vdNs9Yr0Z324VNlrF+0wMqRXT4St8ck=\"},{\"path\":\"golang.org/x/tools\",\"version\":\"v0.0.0-20201123203206-735e963e909b\",\"sum\":\"h1:U8XGResmZKfdo8rCjWPsuiB4cu7N0PJSpQwc9lZr9Rg=\"},{\"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\":\"v0.0.0-20200927160801-5bfeb2e70dd6\",\"sum\":\"h1:z+/YqapuV7VZPvBb3GYmuEJbA88M3PFUxaHilHYVCpQ=\"},{\"path\":\"mvdan.cc/xurls/v2\",\"version\":\"v2.2.0\",\"sum\":\"h1:NSZPykBXJFCetGZykLAxaL6SIpvbVy/UFEniIfHAa8A=\"}]}"}}


[Trace - 10:44:19.880 AM] Sending notification 'initialized'.
Params: {}


[Trace - 10:44:19.880 AM] Sending notification 'textDocument/didOpen'.
Params: {"textDocument":{"uri":"file:///c%3A/Users/hakim/work/main.go","languageId":"go","version":58,"text":"package main\r\n\r\n// Config describes a common configuration block\r\n// for a database connection\r\ntype Config struct {\r\n\t// Type is the type of database. Currently supported database types\r\n\t// are:\r\n\t//   postgres\r\n\tType   string `json:\"type\"`\r\n\tConfig string `json:\"config\"`\r\n}\r\n"}}


[Trace - 10:44:19.880 AM] Sending request 'textDocument/documentSymbol - (1)'.
Params: {"textDocument":{"uri":"file:///c%3A/Users/hakim/work/main.go"}}


[Trace - 10:44:19.880 AM] Sending request 'textDocument/codeAction - (2)'.
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[Trace - 10:44:19.880 AM] Sending request 'textDocument/documentLink - (3)'.
Params: {"textDocument":{"uri":"file:///c%3A/Users/hakim/work/main.go"}}


[Trace - 10:44:19.896 AM] Received request 'window/workDoneProgress/create - (1)'.
Params: {"token":"5577006791947779410"}


[Trace - 10:44:19.896 AM] Sending response 'window/workDoneProgress/create - (1)' in 0ms.
Result: 


[Trace - 10:44:19.904 AM] Received notification '$/progress'.
Params: {"token":"5577006791947779410","value":{"kind":"begin","title":"Setting up workspace","message":"Loading packages..."}}


[Trace - 10:44:19.904 AM] Received request 'workspace/configuration - (2)'.
Params: {"items":[{"scopeUri":"file:///C:/Users/hakim/work","section":"gopls"}]}


[Trace - 10:44:19.904 AM] Sending response 'workspace/configuration - (2)' in 0ms.
Result: [null]


[Trace - 10:44:20.257 AM] Sending request 'textDocument/foldingRange - (4)'.
Params: {"textDocument":{"uri":"file:///c%3A/Users/hakim/work/main.go"}}


[Trace - 10:44:20.258 AM] Sending request 'textDocument/codeLens - (5)'.
Params: {"textDocument":{"uri":"file:///c%3A/Users/hakim/work/main.go"}}


[Trace - 10:44:20.259 AM] Sending request 'textDocument/codeLens - (6)'.
Params: {"textDocument":{"uri":"file:///c%3A/Users/hakim/work/main.go"}}


[Trace - 10:44:20.538 AM] Received request 'client/registerCapability - (3)'.
Params: {"registrations":[{"id":"workspace/didChangeWatchedFiles-0","method":"workspace/didChangeWatchedFiles","registerOptions":{"watchers":[{"globPattern":"**/*.{go,mod,sum}","kind":7}]}}]}


[Trace - 10:44:20.540 AM] Received notification 'window/logMessage'.
Params: {"type":3,"message":"2020/12/02 10:44:20 go env for C:\\Users\\hakim\\work\n(root C:\\Users\\hakim\\work)\n(go version go version go1.15.5 windows/amd64)\n(valid build configuration = true)\n(build flags: [])\nGOSUMDB=sum.golang.org\nGOFLAGS=\nGONOPROXY=\nGOINSECURE=\nGOMOD=C:\\Users\\hakim\\work\\go.mod\nGOPROXY=https://proxy.golang.org,direct\nGO111MODULE=\nGOCACHE=C:\\Users\\Administrator\\AppData\\Local\\go-build\nGOPATH=C:\\Users\\Administrator\\go\nGOPRIVATE=\nGOMODCACHE=C:\\Users\\Administrator\\go\\pkg\\mod\nGONOSUMDB=\nGOROOT=c:\\go\n\n"}


[Info  - 10:44:20 AM] 2020/12/02 10:44:20 go env for C:\Users\hakim\work
(root C:\Users\hakim\work)
(go version go version go1.15.5 windows/amd64)
(valid build configuration = true)
(build flags: [])
GOSUMDB=sum.golang.org
GOFLAGS=
GONOPROXY=
GOINSECURE=
GOMOD=C:\Users\hakim\work\go.mod
GOPROXY=https://proxy.golang.org,direct
GO111MODULE=
GOCACHE=C:\Users\Administrator\AppData\Local\go-build
GOPATH=C:\Users\Administrator\go
GOPRIVATE=
GOMODCACHE=C:\Users\Administrator\go\pkg\mod
GONOSUMDB=
GOROOT=c:\go


[Trace - 10:44:20.756 AM] Sending response 'client/registerCapability - (3)' in 217ms.
Result: 


[Trace - 10:44:20.758 AM] Received request 'client/registerCapability - (4)'.
Params: {"registrations":[{"id":"workspace/didChangeConfiguration","method":"workspace/didChangeConfiguration"},{"id":"workspace/didChangeWorkspaceFolders","method":"workspace/didChangeWorkspaceFolders"}]}


[Trace - 10:44:20.868 AM] Sending response 'client/registerCapability - (4)' in 110ms.
Result: 


[Trace - 10:44:21.125 AM] Received notification 'window/logMessage'.
Params: {"type":3,"message":"2020/12/02 10:44:21 go/packages.Load\n\tsnapshot=0\n\tdirectory=C:\\Users\\hakim\\work\n\tquery=[builtin work/...]\n\tpackages=2\n"}


[Info  - 10:44:21 AM] 2020/12/02 10:44:21 go/packages.Load
    snapshot=0
    directory=C:\Users\hakim\work
    query=[builtin work/...]
    packages=2

[Trace - 10:44:21.128 AM] Received notification '$/progress'.
Params: {"token":"5577006791947779410","value":{"kind":"end","message":"Finished loading packages."}}


[Trace - 10:44:21.131 AM] Received response 'textDocument/documentSymbol - (1)' in 1251ms.
Result: [{"name":"Config","detail":"struct{...}","kind":23,"range":{"start":{"line":4,"character":5},"end":{"line":10,"character":1}},"selectionRange":{"start":{"line":4,"character":5},"end":{"line":4,"character":11}},"children":[{"name":"Type","detail":"string","kind":8,"range":{"start":{"line":8,"character":1},"end":{"line":8,"character":28}},"selectionRange":{"start":{"line":8,"character":1},"end":{"line":8,"character":5}}},{"name":"Config","detail":"string","kind":8,"range":{"start":{"line":9,"character":1},"end":{"line":9,"character":30}},"selectionRange":{"start":{"line":9,"character":1},"end":{"line":9,"character":7}}}]}]


[Trace - 10:44:21.252 AM] Received response 'textDocument/codeAction - (2)' in 1372ms.
Result: [{"title":"Organize Imports","kind":"source.organizeImports","disabled":{"reason":""},"edit":{"documentChanges":[{"textDocument":{"version":58,"uri":"file:///C:/Users/hakim/work/main.go"},"edits":[{"range":{"start":{"line":0,"character":12},"end":{"line":0,"character":13}},"newText":""},{"range":{"start":{"line":1,"character":0},"end":{"line":1,"character":1}},"newText":""},{"range":{"start":{"line":2,"character":48},"end":{"line":2,"character":49}},"newText":""},{"range":{"start":{"line":2,"character":49},"end":{"line":2,"character":49}},"newText":"\n// for a database connection"}]}]}}]


[Trace - 10:44:21.294 AM] Received response 'textDocument/documentLink - (3)' in 1414ms.
Result: null


[Trace - 10:44:21.298 AM] Received response 'textDocument/foldingRange - (4)' in 1040ms.
Result: [{"startLine":2,"startCharacter":48,"endLine":3,"endCharacter":28,"kind":"comment"},{"startLine":4,"startCharacter":20,"endLine":9,"endCharacter":30},{"startLine":5,"startCharacter":68,"endLine":7,"endCharacter":14,"kind":"comment"}]


[Trace - 10:44:21.317 AM] Received response 'textDocument/codeLens - (5)' in 1058ms.
Result: null


[Trace - 10:44:21.318 AM] Received response 'textDocument/codeLens - (6)' in 1059ms.
Result: null


[Trace - 10:44:23.368 AM] Sending request 'textDocument/documentHighlight - (7)'.
Params: {"textDocument":{"uri":"file:///c%3A/Users/hakim/work/main.go"},"position":{"line":5,"character":46}}


[Trace - 10:44:23.371 AM] Received response 'textDocument/documentHighlight - (7)' in 2ms.
Result: []


[Trace - 10:44:23.589 AM] Sending request 'textDocument/codeAction - (8)'.
Params: {"textDocument":{"uri":"file:///c%3A/Users/hakim/work/main.go"},"range":{"start":{"line":5,"character":46},"end":{"line":5,"character":46}},"context":{"diagnostics":[]}}


[Trace - 10:44:23.594 AM] Received response 'textDocument/codeAction - (8)' in 5ms.
Result: [{"title":"Organize Imports","kind":"source.organizeImports","disabled":{"reason":""},"edit":{"documentChanges":[{"textDocument":{"version":58,"uri":"file:///C:/Users/hakim/work/main.go"},"edits":[{"range":{"start":{"line":0,"character":12},"end":{"line":0,"character":13}},"newText":""},{"range":{"start":{"line":1,"character":0},"end":{"line":1,"character":1}},"newText":""},{"range":{"start":{"line":2,"character":48},"end":{"line":2,"character":49}},"newText":""},{"range":{"start":{"line":2,"character":49},"end":{"line":2,"character":49}},"newText":"\n// for a database connection"}]}]}}]


[Trace - 10:44:38.351 AM] Sending request 'textDocument/codeAction - (9)'.
Params: {"textDocument":{"uri":"file:///c%3A/Users/hakim/work/main.go"},"range":{"start":{"line":0,"character":0},"end":{"line":11,"character":0}},"context":{"diagnostics":[],"only":["source.organizeImports"]}}


[Trace - 10:44:38.354 AM] Received response 'textDocument/codeAction - (9)' in 2ms.
Result: [{"title":"Organize Imports","kind":"source.organizeImports","disabled":{"reason":""},"edit":{"documentChanges":[{"textDocument":{"version":58,"uri":"file:///C:/Users/hakim/work/main.go"},"edits":[{"range":{"start":{"line":0,"character":12},"end":{"line":0,"character":13}},"newText":""},{"range":{"start":{"line":1,"character":0},"end":{"line":1,"character":1}},"newText":""},{"range":{"start":{"line":2,"character":48},"end":{"line":2,"character":49}},"newText":""},{"range":{"start":{"line":2,"character":49},"end":{"line":2,"character":49}},"newText":"\n// for a database connection"}]}]}}]


[Trace - 10:44:38.462 AM] Sending notification 'textDocument/didChange'.
Params: {"textDocument":{"uri":"file:///c%3A/Users/hakim/work/main.go","version":59},"contentChanges":[{"range":{"start":{"line":2,"character":48},"end":{"line":2,"character":48}},"rangeLength":0,"text":"\r\n// for a database connection"}]}


[Trace - 10:44:38.462 AM] Sending request 'textDocument/formatting - (10)'.
Params: {"textDocument":{"uri":"file:///c%3A/Users/hakim/work/main.go"},"options":{"tabSize":4,"insertSpaces":false}}


[Trace - 10:44:38.481 AM] Received response 'textDocument/formatting - (10)' in 18ms.
Result: [{"range":{"start":{"line":0,"character":12},"end":{"line":0,"character":13}},"newText":""},{"range":{"start":{"line":1,"character":0},"end":{"line":1,"character":1}},"newText":""},{"range":{"start":{"line":2,"character":48},"end":{"line":2,"character":49}},"newText":""},{"range":{"start":{"line":3,"character":28},"end":{"line":3,"character":29}},"newText":""},{"range":{"start":{"line":4,"character":28},"end":{"line":4,"character":29}},"newText":""},{"range":{"start":{"line":5,"character":20},"end":{"line":5,"character":21}},"newText":""},{"range":{"start":{"line":6,"character":68},"end":{"line":6,"character":69}},"newText":""},{"range":{"start":{"line":7,"character":8},"end":{"line":7,"character":9}},"newText":""},{"range":{"start":{"line":8,"character":14},"end":{"line":8,"character":15}},"newText":""},{"range":{"start":{"line":9,"character":28},"end":{"line":9,"character":29}},"newText":""},{"range":{"start":{"line":10,"character":30},"end":{"line":10,"character":31}},"newText":""},{"range":{"start":{"line":11,"character":1},"end":{"line":11,"character":2}},"newText":""}]


[Trace - 10:44:38.600 AM] Sending request 'textDocument/foldingRange - (11)'.
Params: {"textDocument":{"uri":"file:///c%3A/Users/hakim/work/main.go"}}


[Trace - 10:44:38.600 AM] Sending notification 'textDocument/didSave'.
Params: {"textDocument":{"uri":"file:///c%3A/Users/hakim/work/main.go","version":59}}


[Trace - 10:44:38.637 AM] Received response 'textDocument/foldingRange - (11)' in 37ms.
Result: [{"startLine":2,"startCharacter":48,"endLine":4,"endCharacter":28,"kind":"comment"},{"startLine":5,"startCharacter":20,"endLine":10,"endCharacter":30},{"startLine":6,"startCharacter":68,"endLine":8,"endCharacter":14,"kind":"comment"}]


[Trace - 10:44:38.896 AM] Sending request 'textDocument/codeAction - (12)'.
Params: {"textDocument":{"uri":"file:///c%3A/Users/hakim/work/main.go"},"range":{"start":{"line":6,"character":46},"end":{"line":6,"character":46}},"context":{"diagnostics":[]}}


[Trace - 10:44:38.896 AM] Sending request 'textDocument/codeLens - (13)'.
Params: {"textDocument":{"uri":"file:///c%3A/Users/hakim/work/main.go"}}


[Trace - 10:44:38.900 AM] Sending request 'textDocument/codeLens - (14)'.
Params: {"textDocument":{"uri":"file:///c%3A/Users/hakim/work/main.go"}}


[Trace - 10:44:38.900 AM] Sending request 'textDocument/documentSymbol - (15)'.
Params: {"textDocument":{"uri":"file:///c%3A/Users/hakim/work/main.go"}}


[Trace - 10:44:38.938 AM] Received response 'textDocument/codeAction - (12)' in 42ms.
Result: [{"title":"Organize Imports","kind":"source.organizeImports","disabled":{"reason":""},"edit":{"documentChanges":[{"textDocument":{"version":59,"uri":"file:///C:/Users/hakim/work/main.go"},"edits":[{"range":{"start":{"line":0,"character":12},"end":{"line":0,"character":13}},"newText":""},{"range":{"start":{"line":1,"character":0},"end":{"line":1,"character":1}},"newText":""},{"range":{"start":{"line":2,"character":48},"end":{"line":2,"character":49}},"newText":""},{"range":{"start":{"line":2,"character":49},"end":{"line":2,"character":49}},"newText":"\n// for a database connection\n// for a database connection"}]}]}}]


[Trace - 10:44:38.938 AM] Received response 'textDocument/codeLens - (13)' in 42ms.
Result: null


[Trace - 10:44:38.938 AM] Received response 'textDocument/codeLens - (14)' in 38ms.
Result: null


[Trace - 10:44:38.938 AM] Received response 'textDocument/documentSymbol - (15)' in 38ms.
Result: [{"name":"Config","detail":"struct{...}","kind":23,"range":{"start":{"line":5,"character":5},"end":{"line":11,"character":1}},"selectionRange":{"start":{"line":5,"character":5},"end":{"line":5,"character":11}},"children":[{"name":"Type","detail":"string","kind":8,"range":{"start":{"line":9,"character":1},"end":{"line":9,"character":28}},"selectionRange":{"start":{"line":9,"character":1},"end":{"line":9,"character":5}}},{"name":"Config","detail":"string","kind":8,"range":{"start":{"line":10,"character":1},"end":{"line":10,"character":30}},"selectionRange":{"start":{"line":10,"character":1},"end":{"line":10,"character":7}}}]}]


[Trace - 10:44:39.193 AM] Sending notification 'workspace/didChangeWatchedFiles'.
Params: {"changes":[{"uri":"file:///c%3A/Users/hakim/work/main.go","type":2}]}


[Trace - 10:44:39.387 AM] Sending request 'textDocument/documentLink - (16)'.
Params: {"textDocument":{"uri":"file:///c%3A/Users/hakim/work/main.go"}}


[Trace - 10:44:39.389 AM] Received response 'textDocument/documentLink - (16)' in 2ms.
Result: null

[gopherbot]

Change https://golang.org/cl/275012 mentions this issue: internal/lsp: fix handling of //-style comments in CRLF files

[gopherbot]

Change https://golang.org/cl/275437 mentions this issue: [gopls-release-branch.0.5] internal/lsp: fix handling of //-style comments in CRLF files