x/tools/gopls: Completion not working in modules with "vendor" as their name

[chenaoxd]

gopls version

Build info
----------
golang.org/x/tools/gopls v0.9.1
    golang.org/x/tools/gopls@v0.9.1 h1:SigsTL4Hpv3a6b/a7oPCLRv5QUeSM6PZNdta1oKY4B0=
    github.com/BurntSushi/toml@v1.0.0 h1:dtDWrepsVPfW9H/4y7dDgFc2MBUSeJhlaDtK13CxFlU=
    github.com/google/go-cmp@v0.5.7 h1:81/ik6ipDQS2aGcBfIN5dHDB36BwrStyeAQquSYCV4o=
    github.com/sergi/go-diff@v1.1.0 h1:we8PVUC3FE2uYfodKH/nBHMSetSfHDR6scGdBi+erh0=
    golang.org/x/exp/typeparams@v0.0.0-20220218215828-6cf2b201936e h1:qyrTQ++p1afMkO4DPEeLGq/3oTsdlvdH4vqZUBWzUKM=
    golang.org/x/mod@v0.6.0-dev.0.20220419223038-86c51ed26bb4 h1:6zppjxzCulZykYSLyVDYbneBfbaBIQPYMevg0bEwv2s=
    golang.org/x/sync@v0.0.0-20210220032951-036812b2e83c h1:5KslGYwFpkhGh+Q16bwMP3cOontH8FOep7tGV86Y7SQ=
    golang.org/x/sys@v0.0.0-20220209214540-3681064d5158 h1:rm+CHSpPEEW2IsXUib1ThaHIjuBVZjxNgSKmBLFfD4c=
    golang.org/x/text@v0.3.7 h1:olpwvP2KacW1ZWvsR7uQhoyTYvKAupfQrRGBFM352Gk=
    golang.org/x/tools@v0.1.12-0.20220713141851-7464a5a40219 h1:Ljlba2fVWOA1049JjsKii44g8nZN2GjpxMlzVc8AnQM=
    golang.org/x/vuln@v0.0.0-20220613164644-4eb5ba49563c h1:r5bbIROBQtRRgoutV8Q3sFY58VzHW6jMBYl48ANSyS4=
    honnef.co/go/tools@v0.3.2 h1:ytYb4rOqyp1TSa2EPvNVwtPQJctSELKaMyLfqNP4+34=
    mvdan.cc/gofumpt@v0.3.0 h1:kTojdZo9AcEYbQYhGuLf/zszYthRdhDNDUi2JKTxas4=
    mvdan.cc/xurls/v2@v2.4.0 h1:tzxjVAj+wSBmDcF6zBB7/myTy3gX9xvi8Tyr28AuQgc=
go: go1.18.4

go env

GO111MODULE=""
GOARCH="amd64"
GOBIN=""
GOCACHE="/home/chenao/.cache/go-build"
GOENV="/home/chenao/.config/go/env"
GOEXE=""
GOEXPERIMENT=""
GOFLAGS=""
GOHOSTARCH="amd64"
GOHOSTOS="linux"
GOINSECURE=""
GOMODCACHE="/home/chenao/go/pkg/mod"
GONOPROXY=""
GONOSUMDB="somedomain.com"
GOOS="linux"
GOPATH="/home/chenao/go"
GOPRIVATE=""
GOPROXY="https://goproxy.cn"
GOROOT="/usr/local/go"
GOSUMDB="sum.golang.org"
GOTMPDIR=""
GOTOOLDIR="/usr/local/go/pkg/tool/linux_amd64"
GOVCS=""
GOVERSION="go1.18.4"
GCCGO="gccgo"
GOAMD64="v1"
AR="ar"
CC="gcc"
CXX="g++"
CGO_ENABLED="1"
GOMOD="/home/chenao/github.com/chenaoxd/gopls-bug/go.mod"
GOWORK=""
CGO_CFLAGS="-g -O2 -Wno-return-local-addr"
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-build3157977497=/tmp/go-build -gno-record-gcc-switches"

What did you do?

There's a repo to reproduce this issue: https://github.com/chenaoxd/gopls-bug, the gopls will simply not work in files that are in a module with "vendor" as the module name. Such as in the demo/vendor/test.go.

Some screenshots:

What did you expect to see?

The gopls completion work as normal.

What did you see instead?

It breaks, and always give the same completion candidates.

Editor and settings

Editor: Neovim + coc.neovim
Config:

"languageserver": {
     "go": {
            "command": "gopls",
            "rootPatterns": ["go.mod"],
            "trace.server": "verbose",
            "filetypes": ["go"]
     },
     ...
}

Logs

[Trace - 02:10:27.065 AM] Sending request 'initialize - (0)'.
Params: {"processId":994099,"rootPath":"/home/chenao/github.com/chenaoxd/gopls-bug","rootUri":"file:///home/chenao/github.com/chenaoxd/gopls-bug","capabilities":{"workspace":{"applyEdit":true,"workspaceEdit":{"documentChanges":true,"resourceOperations":["create","rename","delete"],"failureHandling":"undo","normalizesLineEndings":true,"changeAnnotationSupport":{"groupsOnLabel":false}},"didChangeConfiguration":{"dynamicRegistration":true},"didChangeWatchedFiles":{"dynamicRegistration":true},"symbol":{"dynamicRegistration":true,"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]},"tagSupport":{"valueSet":[1]}},"codeLens":{"refreshSupport":true},"executeCommand":{"dynamicRegistration":true},"configuration":true,"fileOperations":{"dynamicRegistration":true,"didCreate":true,"didRename":true,"didDelete":true,"willCreate":true,"willRename":true,"willDelete":true},"semanticTokens":{"refreshSupport":true},"workspaceFolders":true},"textDocument":{"publishDiagnostics":{"relatedInformation":true,"versionSupport":true,"tagSupport":{"valueSet":[1,2]},"codeDescriptionSupport":true,"dataSupport":true},"synchronization":{"dynamicRegistration":true,"willSave":true,"willSaveWaitUntil":true,"didSave":true},"completion":{"dynamicRegistration":true,"contextSupport":true,"completionItem":{"snippetSupport":true,"commitCharactersSupport":true,"documentationFormat":["markdown","plaintext"],"deprecatedSupport":true,"preselectSupport":true,"insertReplaceSupport":true,"tagSupport":{"valueSet":[1]},"resolveSupport":{"properties":["documentation","detail","additionalTextEdits"]},"insertTextModeSupport":{"valueSet":[1,2]}},"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]},"insertTextMode":2},"hover":{"dynamicRegistration":true,"contentFormat":["markdown","plaintext"]},"signatureHelp":{"dynamicRegistration":true,"contextSupport":true,"signatureInformation":{"documentationFormat":["markdown","plaintext"],"activeParameterSupport":true,"parameterInformation":{"labelOffsetSupport":true}}},"references":{"dynamicRegistration":true},"definition":{"dynamicRegistration":true},"documentHighlight":{"dynamicRegistration":true},"documentSymbol":{"dynamicRegistration":true,"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]},"hierarchicalDocumentSymbolSupport":true,"tagSupport":{"valueSet":[1]},"labelSupport":true},"codeAction":{"dynamicRegistration":true,"isPreferredSupport":true,"disabledSupport":true,"dataSupport":true,"honorsChangeAnnotations":false,"resolveSupport":{"properties":["edit"]},"codeActionLiteralSupport":{"codeActionKind":{"valueSet":["","quickfix","refactor","refactor.extract","refactor.inline","refactor.rewrite","source","source.organizeImports"]}}},"codeLens":{"dynamicRegistration":true},"formatting":{"dynamicRegistration":true},"rangeFormatting":{"dynamicRegistration":true},"onTypeFormatting":{"dynamicRegistration":true},"rename":{"dynamicRegistration":true,"prepareSupport":true},"documentLink":{"dynamicRegistration":true,"tooltipSupport":true},"typeDefinition":{"dynamicRegistration":true},"implementation":{"dynamicRegistration":true},"declaration":{"dynamicRegistration":true},"colorProvider":{"dynamicRegistration":true},"foldingRange":{"dynamicRegistration":true,"rangeLimit":5000,"lineFoldingOnly":true},"selectionRange":{"dynamicRegistration":true},"callHierarchy":{"dynamicRegistration":true},"linkedEditingRange":{"dynamicRegistration":true},"semanticTokens":{"dynamicRegistration":true,"tokenTypes":["namespace","type","class","enum","interface","struct","typeParameter","parameter","variable","property","enumMember","event","function","method","macro","keyword","modifier","comment","string","number","regexp","operator"],"tokenModifiers":["declaration","definition","readonly","static","deprecated","abstract","async","modification","documentation","defaultLibrary"],"formats":["relative"],"requests":{"range":true,"full":{"delta":true}},"multilineTokenSupport":false,"overlappingTokenSupport":false}},"window":{"showMessage":{"messageActionItem":{"additionalPropertiesSupport":true}},"showDocument":{"support":true},"workDoneProgress":true},"general":{"regularExpressions":{"engine":"ECMAScript","version":"ES2020"},"markdown":{"parser":"marked","version":"4.0.10"}}},"initializationOptions":{},"trace":"verbose","workspaceFolders":[{"uri":"file:///home/chenao/github.com/chenaoxd/gopls-bug","name":"gopls-bug"}],"locale":"en_US","clientInfo":{"name":"coc.nvim","version":"0.0.81"}}


[Trace - 02:10:27.066 AM] Received response 'initialize - (0)' in 1ms.
Result: {"capabilities":{"textDocumentSync":{"openClose":true,"change":2,"save":{}},"completionProvider":{"triggerCharacters":["."],"completionItem":{}},"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.add_dependency","gopls.add_import","gopls.apply_fix","gopls.check_upgrades","gopls.edit_go_directive","gopls.gc_details","gopls.generate","gopls.generate_gopls_mod","gopls.go_get_package","gopls.list_imports","gopls.list_known_packages","gopls.regenerate_cgo","gopls.remove_dependency","gopls.run_tests","gopls.run_vulncheck_exp","gopls.start_debugging","gopls.test","gopls.tidy","gopls.toggle_gc_details","gopls.update_go_sum","gopls.upgrade_dependency","gopls.vendor"]},"callHierarchyProvider":true,"workspace":{"workspaceFolders":{"supported":true,"changeNotifications":"workspace/didChangeWorkspaceFolders"}},"inlayHintProvider":{}},"serverInfo":{"name":"gopls","version":"{\"GoVersion\":\"go1.18.4\",\"Path\":\"golang.org/x/tools/gopls\",\"Main\":{\"Path\":\"golang.org/x/tools/gopls\",\"Version\":\"v0.9.1\",\"Sum\":\"h1:SigsTL4Hpv3a6b/a7oPCLRv5QUeSM6PZNdta1oKY4B0=\",\"Replace\":null},\"Deps\":[{\"Path\":\"github.com/BurntSushi/toml\",\"Version\":\"v1.0.0\",\"Sum\":\"h1:dtDWrepsVPfW9H/4y7dDgFc2MBUSeJhlaDtK13CxFlU=\",\"Replace\":null},{\"Path\":\"github.com/google/go-cmp\",\"Version\":\"v0.5.7\",\"Sum\":\"h1:81/ik6ipDQS2aGcBfIN5dHDB36BwrStyeAQquSYCV4o=\",\"Replace\":null},{\"Path\":\"github.com/sergi/go-diff\",\"Version\":\"v1.1.0\",\"Sum\":\"h1:we8PVUC3FE2uYfodKH/nBHMSetSfHDR6scGdBi+erh0=\",\"Replace\":null},{\"Path\":\"golang.org/x/exp/typeparams\",\"Version\":\"v0.0.0-20220218215828-6cf2b201936e\",\"Sum\":\"h1:qyrTQ++p1afMkO4DPEeLGq/3oTsdlvdH4vqZUBWzUKM=\",\"Replace\":null},{\"Path\":\"golang.org/x/mod\",\"Version\":\"v0.6.0-dev.0.20220419223038-86c51ed26bb4\",\"Sum\":\"h1:6zppjxzCulZykYSLyVDYbneBfbaBIQPYMevg0bEwv2s=\",\"Replace\":null},{\"Path\":\"golang.org/x/sync\",\"Version\":\"v0.0.0-20210220032951-036812b2e83c\",\"Sum\":\"h1:5KslGYwFpkhGh+Q16bwMP3cOontH8FOep7tGV86Y7SQ=\",\"Replace\":null},{\"Path\":\"golang.org/x/sys\",\"Version\":\"v0.0.0-20220209214540-3681064d5158\",\"Sum\":\"h1:rm+CHSpPEEW2IsXUib1ThaHIjuBVZjxNgSKmBLFfD4c=\",\"Replace\":null},{\"Path\":\"golang.org/x/text\",\"Version\":\"v0.3.7\",\"Sum\":\"h1:olpwvP2KacW1ZWvsR7uQhoyTYvKAupfQrRGBFM352Gk=\",\"Replace\":null},{\"Path\":\"golang.org/x/tools\",\"Version\":\"v0.1.12-0.20220713141851-7464a5a40219\",\"Sum\":\"h1:Ljlba2fVWOA1049JjsKii44g8nZN2GjpxMlzVc8AnQM=\",\"Replace\":null},{\"Path\":\"golang.org/x/vuln\",\"Version\":\"v0.0.0-20220613164644-4eb5ba49563c\",\"Sum\":\"h1:r5bbIROBQtRRgoutV8Q3sFY58VzHW6jMBYl48ANSyS4=\",\"Replace\":null},{\"Path\":\"honnef.co/go/tools\",\"Version\":\"v0.3.2\",\"Sum\":\"h1:ytYb4rOqyp1TSa2EPvNVwtPQJctSELKaMyLfqNP4+34=\",\"Replace\":null},{\"Path\":\"mvdan.cc/gofumpt\",\"Version\":\"v0.3.0\",\"Sum\":\"h1:kTojdZo9AcEYbQYhGuLf/zszYthRdhDNDUi2JKTxas4=\",\"Replace\":null},{\"Path\":\"mvdan.cc/xurls/v2\",\"Version\":\"v2.4.0\",\"Sum\":\"h1:tzxjVAj+wSBmDcF6zBB7/myTy3gX9xvi8Tyr28AuQgc=\",\"Replace\":null}],\"Settings\":[{\"Key\":\"-compiler\",\"Value\":\"gc\"},{\"Key\":\"CGO_ENABLED\",\"Value\":\"1\"},{\"Key\":\"CGO_CFLAGS\",\"Value\":\"-g -O2 -Wno-return-local-addr\"},{\"Key\":\"CGO_CPPFLAGS\",\"Value\":\"\"},{\"Key\":\"CGO_CXXFLAGS\",\"Value\":\"\"},{\"Key\":\"CGO_LDFLAGS\",\"Value\":\"\"},{\"Key\":\"GOARCH\",\"Value\":\"amd64\"},{\"Key\":\"GOOS\",\"Value\":\"linux\"},{\"Key\":\"GOAMD64\",\"Value\":\"v1\"}],\"Version\":\"v0.9.1\"}"}}


[Trace - 02:10:27.075 AM] Sending notification 'initialized'.
Params: {}


[Trace - 02:10:27.075 AM] Sending notification 'workspace/didChangeConfiguration'.
Params: {"settings":{}}


[Trace - 02:10:27.075 AM] Sending notification 'textDocument/didOpen'.
Params: {"textDocument":{"uri":"file:///home/chenao/github.com/chenaoxd/gopls-bug/demo/vendor/test.go","languageId":"go","version":1,"text":"package vendor\n\nimport (\n\t\"fmt\"\n)\n\nfunc Test() {\n\tfmt.Println(\"in inner module\")\n}\n"}}


[Trace - 02:10:27.075 AM] Received request 'window/workDoneProgress/create - (1)'.
Params: {"token":"5577006791947779410"}


[Trace - 02:10:27.076 AM] Sending response 'window/workDoneProgress/create - (1)' in 0ms.
Result: 


[Trace - 02:10:27.077 AM] Received notification '$/progress'.
Params: {"token":"5577006791947779410","value":{"kind":"begin","title":"Setting up workspace","message":"Loading packages..."}}


[Trace - 02:10:27.077 AM] Received request 'workspace/configuration - (2)'.
Params: {"items":[{"scopeUri":"file:///home/chenao/github.com/chenaoxd/gopls-bug","section":"gopls"}]}


[Trace - 02:10:27.079 AM] Sending response 'workspace/configuration - (2)' in 2ms.
Result: [null]


[Trace - 02:10:27.088 AM] Received notification 'window/logMessage'.
Params: {"type":3,"message":"2022/07/27 02:10:27 go env for /home/chenao/github.com/chenaoxd/gopls-bug\n(root /home/chenao/github.com/chenaoxd/gopls-bug)\n(go version go version go1.18.4 linux/amd64)\n(valid build configuration = true)\n(build flags: [])\nGOSUMDB=sum.golang.org\nGOCACHE=/home/chenao/.cache/go-build\nGOROOT=/usr/local/go\nGOPATH=/home/chenao/go\nGOPRIVATE=\nGOPROXY=https://goproxy.cn\nGOMOD=/home/chenao/github.com/chenaoxd/gopls-bug/go.mod\nGOMODCACHE=/home/chenao/go/pkg/mod\nGOWORK=\nGOINSECURE=\nGONOSUMDB=somedomain.com\nGOFLAGS=\nGONOPROXY=\nGO111MODULE=\n\n"}


[Trace - 02:10:27.147 AM] Received notification 'window/logMessage'.
Params: {"type":3,"message":"2022/07/27 02:10:27 go/packages.Load #1\n\tsnapshot=0\n\tdirectory=/home/chenao/github.com/chenaoxd/gopls-bug\n\tquery=[builtin chenaoxd.com/chenao/goplsbug/...]\n\tpackages=3\n"}


[Trace - 02:10:27.148 AM] Received notification 'window/logMessage'.
Params: {"type":3,"message":"2022/07/27 02:10:27 go/packages.Load #1: updating metadata for 41 packages\n"}


[Trace - 02:10:27.168 AM] Received notification '$/progress'.
Params: {"token":"5577006791947779410","value":{"kind":"end","message":"Finished loading packages."}}


[Trace - 02:10:27.168 AM] Received request 'client/registerCapability - (3)'.
Params: {"registrations":[{"id":"workspace/didChangeWatchedFiles-0","method":"workspace/didChangeWatchedFiles","registerOptions":{"watchers":[{"globPattern":"**/*.{go,mod,sum,work}","kind":7},{"globPattern":"{/home/chenao/github.com/chenaoxd/gopls-bug/demo,/home/chenao/github.com/chenaoxd/gopls-bug/demo/vendor}","kind":7}]}}]}


[Trace - 02:10:27.170 AM] Sending response 'client/registerCapability - (3)' in 1ms.
Result: 


[Trace - 02:10:27.172 AM] Received request 'client/registerCapability - (4)'.
Params: {"registrations":[{"id":"workspace/didChangeConfiguration","method":"workspace/didChangeConfiguration"}]}


[Trace - 02:10:27.173 AM] Sending response 'client/registerCapability - (4)' in 1ms.
Result: 


[Trace - 02:10:27.173 AM] Received request 'workspace/configuration - (5)'.
Params: {"items":[{"section":"gopls"}]}


[Trace - 02:10:27.174 AM] Sending response 'workspace/configuration - (5)' in 0ms.
Result: [null]


[Trace - 02:10:27.185 AM] Received request 'workspace/configuration - (6)'.
Params: {"items":[{"scopeUri":"file:///home/chenao/github.com/chenaoxd/gopls-bug","section":"gopls"}]}


[Trace - 02:10:27.190 AM] Sending response 'workspace/configuration - (6)' in 5ms.
Result: [null]


[Trace - 02:10:27.249 AM] Received notification 'window/logMessage'.
Params: {"type":3,"message":"2022/07/27 02:10:27 falling back to safe trimming due to type errors: [/usr/local/go/src/runtime/vdso_linux.go:53:38: invalid operation: division by zero /usr/local/go/src/runtime/vdso_linux.go:54:38: invalid operation: division by zero] or still-missing identifiers: map[memRecordCycle:true pageBits:true]\n\tpackage=\"runtime\"\n"}


[Trace - 02:10:29.724 AM] Sending notification 'textDocument/didChange'.
Params: {"textDocument":{"version":2,"uri":"file:///home/chenao/github.com/chenaoxd/gopls-bug/demo/vendor/test.go"},"contentChanges":[{"range":{"start":{"line":8,"character":0},"end":{"line":8,"character":0}},"text":"\t\n","rangeLength":0}]}


[Trace - 02:10:30.614 AM] Sending notification 'textDocument/didChange'.
Params: {"textDocument":{"version":3,"uri":"file:///home/chenao/github.com/chenaoxd/gopls-bug/demo/vendor/test.go"},"contentChanges":[{"range":{"start":{"line":8,"character":1},"end":{"line":8,"character":1}},"text":"f","rangeLength":0}]}


[Trace - 02:10:30.614 AM] Sending request 'textDocument/completion - (1)'.
Params: {"textDocument":{"uri":"file:///home/chenao/github.com/chenaoxd/gopls-bug/demo/vendor/test.go"},"position":{"line":8,"character":2},"context":{"triggerKind":1}}


[Trace - 02:10:30.615 AM] Received response 'textDocument/completion - (1)' in 0ms.
Result: {"isIncomplete":true,"itemDefaults":{"editRange":{"start":{"line":0,"character":0},"end":{"line":0,"character":0}}},"items":[{"label":"const","labelDetails":{},"kind":14,"preselect":true,"sortText":"00000","filterText":"const","insertTextFormat":2,"textEdit":{"range":{"start":{"line":8,"character":2},"end":{"line":8,"character":2}},"newText":"const"}},{"label":"func","labelDetails":{},"kind":14,"sortText":"00001","filterText":"func","insertTextFormat":2,"textEdit":{"range":{"start":{"line":8,"character":2},"end":{"line":8,"character":2}},"newText":"func"}},{"label":"import","labelDetails":{},"kind":14,"sortText":"00002","filterText":"import","insertTextFormat":2,"textEdit":{"range":{"start":{"line":8,"character":2},"end":{"line":8,"character":2}},"newText":"import"}},{"label":"type","labelDetails":{},"kind":14,"sortText":"00003","filterText":"type","insertTextFormat":2,"textEdit":{"range":{"start":{"line":8,"character":2},"end":{"line":8,"character":2}},"newText":"type"}},{"label":"var","labelDetails":{},"kind":14,"sortText":"00004","filterText":"var","insertTextFormat":2,"textEdit":{"range":{"start":{"line":8,"character":2},"end":{"line":8,"character":2}},"newText":"var"}}]}


[Trace - 02:10:30.615 AM] Received notification 'textDocument/publishDiagnostics'.
Params: {"uri":"file:///home/chenao/github.com/chenaoxd/gopls-bug/demo/vendor/test.go","version":3,"diagnostics":[{"range":{"start":{"line":8,"character":1},"end":{"line":8,"character":2}},"severity":1,"code":"UndeclaredName","codeDescription":{"href":"https://pkg.go.dev/golang.org/x/tools/internal/typesinternal?utm_source=gopls#UndeclaredName"},"source":"compiler","message":"undeclared name: f"}]}


[Trace - 02:10:30.972 AM] Sending notification 'textDocument/didChange'.
Params: {"textDocument":{"version":4,"uri":"file:///home/chenao/github.com/chenaoxd/gopls-bug/demo/vendor/test.go"},"contentChanges":[{"range":{"start":{"line":8,"character":2},"end":{"line":8,"character":2}},"text":"m","rangeLength":0}]}


[Trace - 02:10:30.973 AM] Sending request 'textDocument/completion - (2)'.
Params: {"textDocument":{"uri":"file:///home/chenao/github.com/chenaoxd/gopls-bug/demo/vendor/test.go"},"position":{"line":8,"character":3},"context":{"triggerKind":3}}


[Trace - 02:10:30.974 AM] Received response 'textDocument/completion - (2)' in 1ms.
Result: {"isIncomplete":true,"itemDefaults":{"editRange":{"start":{"line":0,"character":0},"end":{"line":0,"character":0}}},"items":[{"label":"const","labelDetails":{},"kind":14,"preselect":true,"sortText":"00000","filterText":"const","insertTextFormat":2,"textEdit":{"range":{"start":{"line":8,"character":3},"end":{"line":8,"character":3}},"newText":"const"}},{"label":"func","labelDetails":{},"kind":14,"sortText":"00001","filterText":"func","insertTextFormat":2,"textEdit":{"range":{"start":{"line":8,"character":3},"end":{"line":8,"character":3}},"newText":"func"}},{"label":"import","labelDetails":{},"kind":14,"sortText":"00002","filterText":"import","insertTextFormat":2,"textEdit":{"range":{"start":{"line":8,"character":3},"end":{"line":8,"character":3}},"newText":"import"}},{"label":"type","labelDetails":{},"kind":14,"sortText":"00003","filterText":"type","insertTextFormat":2,"textEdit":{"range":{"start":{"line":8,"character":3},"end":{"line":8,"character":3}},"newText":"type"}},{"label":"var","labelDetails":{},"kind":14,"sortText":"00004","filterText":"var","insertTextFormat":2,"textEdit":{"range":{"start":{"line":8,"character":3},"end":{"line":8,"character":3}},"newText":"var"}}]}


[Trace - 02:10:30.977 AM] Received notification 'textDocument/publishDiagnostics'.
Params: {"uri":"file:///home/chenao/github.com/chenaoxd/gopls-bug/demo/vendor/test.go","version":4,"diagnostics":[{"range":{"start":{"line":8,"character":1},"end":{"line":8,"character":3}},"severity":1,"code":"UndeclaredName","codeDescription":{"href":"https://pkg.go.dev/golang.org/x/tools/internal/typesinternal?utm_source=gopls#UndeclaredName"},"source":"compiler","message":"undeclared name: fm"}]}


[Trace - 02:10:31.204 AM] Sending notification 'textDocument/didChange'.
Params: {"textDocument":{"version":5,"uri":"file:///home/chenao/github.com/chenaoxd/gopls-bug/demo/vendor/test.go"},"contentChanges":[{"range":{"start":{"line":8,"character":3},"end":{"line":8,"character":3}},"text":"t","rangeLength":0}]}


[Trace - 02:10:31.205 AM] Sending request 'textDocument/completion - (3)'.
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[Trace - 02:10:31.206 AM] Received response 'textDocument/completion - (3)' in 1ms.
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[Trace - 02:10:31.207 AM] Received notification 'textDocument/publishDiagnostics'.
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[Trace - 02:10:31.454 AM] Sending notification 'textDocument/didChange'.
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[Trace - 02:10:31.460 AM] Received notification 'textDocument/publishDiagnostics'.
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[Trace - 02:10:31.460 AM] Sending request 'textDocument/completion - (4)'.
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[Trace - 02:10:31.462 AM] Received response 'textDocument/completion - (4)' in 1ms.
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[Trace - 02:10:32.167 AM] Sending notification 'textDocument/didChange'.
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[Trace - 02:10:32.171 AM] Received notification 'textDocument/publishDiagnostics'.
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[Trace - 02:10:32.562 AM] Sending notification 'textDocument/didClose'.
Params: {"textDocument":{"uri":"file:///home/chenao/github.com/chenaoxd/gopls-bug/demo/vendor/test.go"}}

[findleyr]

This is a dupe of #53756. Fixing this is unfortunately subtle, as there are many places in the gopls codebase that make assumptions about the meaning of /vendor/. Not sure if this will get done for the v0.9.2 release, but it is a high priority.

[findleyr]

BTW, per my analysis on that issue this has been a long-standing problem. If you observed a recent regression please correct me.