x/tools/gopls: renaming a file breaks code completion when letter capitalization changes

[Alexander Savinykh]

What version of Go, VS Code & VS Code Go extension are you using?

Version Information

• Run go version to get version of Go from the VS Code integrated terminal.
  • go1.22.0 windows/amd64
• Run gopls -v version to get version of Gopls from the VS Code integrated terminal.

Build info
----------
golang.org/x/tools/gopls v0.15.3
    golang.org/x/tools/gopls@v0.15.3 h1:zbdOidFrPTc8Bx0YrN5QKgJ0zCjyGi0L27sKQ/bDG5o=
    github.com/BurntSushi/toml@v1.2.1 h1:9F2/+DoOYIOksmaJFPw1tGFy1eDnIJXg+UHjuD8lTak=
    github.com/google/go-cmp@v0.6.0 h1:ofyhxvXcZhMsU5ulbFiLKl/XBFqE1GSq7atu8tAmTRI=
    golang.org/x/exp/typeparams@v0.0.0-20221212164502-fae10dda9338 h1:2O2DON6y3XMJiQRAS1UWU+54aec2uopH3x7MAiqGW6Y=
    golang.org/x/mod@v0.15.0 h1:SernR4v+D55NyBH2QiEQrlBAnj1ECL6AGrA5+dPaMY8=
    golang.org/x/sync@v0.6.0 h1:5BMeUDZ7vkXGfEr1x9B4bRcTH4lpkTkpdh0T/J+qjbQ=
    golang.org/x/sys@v0.17.0 h1:25cE3gD+tdBA7lp7QfhuV+rJiE9YXTcS3VG1SqssI/Y=
    golang.org/x/telemetry@v0.0.0-20240209200032-7b892fcb8a78 h1:vcVnuftN4J4UKLRcgetjzfU9FjjgXUUYUc3JhFplgV4=
    golang.org/x/text@v0.14.0 h1:ScX5w1eTa3QqT8oi6+ziP7dTV1S2+ALU0bI+0zXKWiQ=
    golang.org/x/tools@v0.18.1-0.20240412183611-d92ae0781217 h1:uH9jJYgeLCvblH0S+03kFO0qUDxRkbLRLFiKVVDl7ak=
    golang.org/x/vuln@v1.0.1 h1:KUas02EjQK5LTuIx1OylBQdKKZ9jeugs+HiqO5HormU=
    honnef.co/go/tools@v0.4.6 h1:oFEHCKeID7to/3autwsWfnuv69j3NsfcXbvJKuIcep8=
    mvdan.cc/gofumpt@v0.6.0 h1:G3QvahNDmpD+Aek/bNOLrFR2XC6ZAdo62dZu65gmwGo=
    mvdan.cc/xurls/v2@v2.5.0 h1:lyBNOm8Wo71UknhUs4QTFUNNMyxy2JEIaKKo0RWOh+8=
go: go1.22.0

• Run code -v or code-insiders -v to get version of VS Code or VS Code Insiders.
  • 1.89.1 dc96b837cf6bb4af9cd736aa3af08cf8279f7685 x64
• Check your installed extensions to get the version of the VS Code Go extension
  • v0.41.4
• Run Ctrl+Shift+P (Cmd+Shift+P on Mac OS) > Go: Locate Configured Go Tools command.

# Tools Configuration


## Environment

GOBIN: undefined
toolsGopath: 
gopath: C:\Users\hinst\go
GOROOT: C:\Program Files\Go
PATH: C:\Program Files (x86)\Microsoft SDKs\Azure\CLI2\wbin;C:\Windows\system32;C:\Windows;C:\Windows\System32\Wbem;C:\Windows\System32\WindowsPowerShell\v1.0\;C:\Windows\System32\OpenSSH\;C:\Users\hinst\AppData\Roaming\nvm;C:\Program Files\nodejs;C:\Program Files\dotnet\;C:\FPC\3.2.2\bin\i386-Win32;C:\Library\Developer\Toolchains\unknown-Asserts-development.xctoolchain\usr\bin;C:\Library\Swift-development\bin;C:\Library\icu-69.1\usr\bin;C:\Program Files\PowerShell\7\;C:\Program Files\Go\bin;C:\Program Files\usbipd-win\;C:\Program Files\Docker\Docker\resources\bin;C:\Program Files\Git\cmd;C:\HaxeToolkit\haxe;C:\Users\hinst\scoop\shims;C:\Users\hinst\AppData\Local\Programs\Python\Launcher\;C:\Program Files\JetBrains\IntelliJ IDEA Community Edition 2021.2\plugins\maven\lib\maven3\bin;C:\Users\hinst\.cargo\bin;C:\Users\hinst\AppData\Local\Yarn\bin;C:\Users\hinst\AppData\Local\Microsoft\WindowsApps;C:\Users\hinst\AppData\Local\Programs\Microsoft VS Code\bin;C:\Users\hinst\AppData\Roaming\npm;C:\Program Files (x86)\Sophos\Sophos SSL VPN Client\bin;C:\Users\hinst\AppData\Roaming\nvm;C:\Users\hinst\go\bin;C:\Users\hinst\AppData\Roaming\nvm;C:\Program Files\nodejs;C:\Users\hinst\go\bin;C:\Users\hinst\.azure-kubectl;C:\Users\hinst\.azure-kubelogin;C:\Users\hinst\.deno\bin;C:\Users\hinst\go\bin;C:\Users\hinst\AppData\Local\JetBrains\Toolbox\scripts;

## Tools

	go:	C:\Program Files\Go\bin\go.exe: go version go1.22.0 windows/amd64

	gopls:	C:\Users\hinst\go\bin\gopls.exe	(version: v0.15.3 built with go: go1.22.0)
	gotests:	C:\Users\hinst\go\bin\gotests.exe	(version: v1.6.0 built with go: go1.22.0)
	gomodifytags:	C:\Users\hinst\go\bin\gomodifytags.exe	(version: v1.16.0 built with go: go1.22.0)
	impl:	C:\Users\hinst\go\bin\impl.exe	(version: v1.1.0 built with go: go1.22.0)
	goplay:	C:\Users\hinst\go\bin\goplay.exe	(version: v1.0.0 built with go: go1.22.0)
	dlv:	C:\Users\hinst\go\bin\dlv.exe	(version: v1.22.0 built with go: go1.22.0)
	staticcheck:	C:\Users\hinst\go\bin\staticcheck.exe	(version: v0.4.6 built with go: go1.22.0)

## Go env

Workspace Folder (MassFood_2D): c:\Dev\MassFood_2D

	set GO111MODULE=
	set GOARCH=amd64
	set GOBIN=
	set GOCACHE=C:\Users\hinst\AppData\Local\go-build
	set GOENV=C:\Users\hinst\AppData\Roaming\go\env
	set GOEXE=.exe
	set GOEXPERIMENT=
	set GOFLAGS=
	set GOHOSTARCH=amd64
	set GOHOSTOS=windows
	set GOINSECURE=
	set GOMODCACHE=C:\Users\hinst\go\pkg\mod
	set GONOPROXY=
	set GONOSUMDB=
	set GOOS=windows
	set GOPATH=C:\Users\hinst\go
	set GOPRIVATE=
	set GOPROXY=https://proxy.golang.org,direct
	set GOROOT=C:\Program Files\Go
	set GOSUMDB=sum.golang.org
	set GOTMPDIR=
	set GOTOOLCHAIN=auto
	set GOTOOLDIR=C:\Program Files\Go\pkg\tool\windows_amd64
	set GOVCS=
	set GOVERSION=go1.22.0
	set GCCGO=gccgo
	set GOAMD64=v1
	set AR=ar
	set CC=gcc
	set CXX=g++
	set CGO_ENABLED=0
	set GOMOD=c:\Dev\MassFood_2D\go.mod
	set GOWORK=
	set CGO_CFLAGS=-O2 -g
	set CGO_CPPFLAGS=
	set CGO_CXXFLAGS=-O2 -g
	set CGO_FFLAGS=-O2 -g
	set CGO_LDFLAGS=-O2 -g
	set PKG_CONFIG=pkg-config
	set GOGCCFLAGS=-m64 -fno-caret-diagnostics -Qunused-arguments -Wl,--no-gc-sections -fmessage-length=0 -ffile-prefix-map=C:\Users\hinst\AppData\Local\Temp\go-build2771098946=/tmp/go-build -gno-record-gcc-switches

Share the Go related settings you have added/edited

Run Preferences: Open Settings (JSON) command to open your settings.json file.
Share all the settings with the go. or ["go"] or gopls prefixes.

"go.toolsManagement.autoUpdate": true

Describe the bug

Renaming golang source file in the project breaks code completion in that file, in cases when only letter capitalization got changed.

Expected behavior: there are no errors
Actual behavior: there are errors

Steps to reproduce the behavior:

1. Create an empty folder and open it in VSCode
2. Create a file named main.go
3. Paste
   1. package main
   2. func main() {}
4. Rename the file a few times:
   6. Main.go
   7. maiN.go
   8. application.go
   9. Application.go
   10. aPplication.go
   11. ...and so on
5. Observe errors:
   1. No packages found for open file C:\Dev\repro\application.go
   2. case-insensitive file name collision: "maiN.go" and "main.go"

Screenshots or recordings

[Saba]

@hinst , can you close all the files and restart to check if issues persists?

[PETERCHUU]

I got the same problem in my repository, after I try to re-name my folder and package case,

half of my file showing case-insensitive import collision, when I trying to switch back to old name, the other half showing the same error,

I need to re-init entire mod to fix the problem .