Cannot launch debugger after update to vscode 1.123.0

[kmpm]

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.
  • go version go1.26.4 windows/amd64
• Run gopls -v version to get version of Gopls from the VS Code integrated terminal.
  • golang.org/x/tools/gopls v0.22.0
    golang.org/x/tools/gopls@v0.22.0 h1:9aON2mTxKrZ1y71RbQVnlPTTNfKZ9y5cv3x/f6XpsZw=
    github.com/BurntSushi/toml@v1.6.0 h1:dRaEfpa2VI55EwlIW72hMRHdWouJeRF7TPYhI+AUQjk=
    github.com/fatih/camelcase@v1.0.0 h1:hxNvNX/xYBp0ovncs8WyWZrOrpBNub/JfaMvbURyft8=
    github.com/fatih/gomodifytags@v1.17.1-0.20250423142747-f3939df9aa3c h1:dDSgAjoOMp8da3egfz0t2S+t8RGOpEmEXZubcGuc0Bg=
    github.com/fatih/structtag@v1.2.0 h1:/OdNE99OxoI/PqaW/SuSK9uxxT3f/tcSZgon/ssNSx4=
    github.com/fsnotify/fsnotify@v1.9.0 h1:2Ml+OJNzbYCTzsxtv8vKSFD9PbJjmhYF14k/jKC7S9k=
    github.com/google/go-cmp@v0.7.0 h1:wk8382ETsv4JYUZwIsn6YpYiWiBsYLSJiTsyBybVuN8=
    github.com/google/jsonschema-go@v0.4.2 h1:tmrUohrwoLZZS/P3x7ex0WAVknEkBZM46iALbcqoRA8=
    github.com/modelcontextprotocol/go-sdk@v1.4.0 h1:u0kr8lbJc1oBcawK7Df+/ajNMpIDFE41OEPxdeTLOn8=
    github.com/segmentio/asm@v1.2.1 h1:DTNbBqs57ioxAD4PrArqftgypG4/qNpXoJx8TVXxPR0=
    github.com/segmentio/encoding@v0.5.3 h1:OjMgICtcSFuNvQCdwqMCv9Tg7lEOXGwm1J5RPQccx6w=
    github.com/yosida95/uritemplate/v3@v3.0.2 h1:Ed3Oyj9yrmi9087+NczuL5BwkIc4wvTb5zIM+UJPGz4=
    golang.org/x/exp/typeparams@v0.0.0-20260312153236-7ab1446f8b90 h1:cfW8UCYSVdPblxA7qQe3o5Iad55Vsx4BFmuGS9RNOmc=
    golang.org/x/mod@v0.35.0 h1:Ww1D637e6Pg+Zb2KrWfHQUnH2dQRLBQyAtpr/haaJeM=
    golang.org/x/oauth2@v0.36.0 h1:peZ/1z27fi9hUOFCAZaHyrpWG5lwe0RJEEEeH0ThlIs=
    golang.org/x/sync@v0.20.0 h1:e0PTpb7pjO8GAtTs2dQ6jYa5BWYlMuX047Dco/pItO4=
    golang.org/x/sys@v0.43.0 h1:Rlag2XtaFTxp19wS8MXlJwTvoh8ArU6ezoyFsMyCTNI=
    golang.org/x/telemetry@v0.0.0-20260409153401-be6f6cb8b1fa h1:efT73AJZfAAUV7SOip6pWGkwJDzIGiKBZGVzHYa+ve4=
    golang.org/x/text@v0.36.0 h1:JfKh3XmcRPqZPKevfXVpI1wXPTqbkE5f7JA92a55Yxg=
    golang.org/x/tools@v0.44.1-0.20260513175300-635ae9663724 h1:rz7KAMVmPA+7ecCT/BHKLE353MUOoCAwMqlUveE8508=
    golang.org/x/vuln@v1.1.4 h1:Ju8QsuyhX3Hk8ma3CesTbO8vfJD9EvUBgHvkxHBzj0I=
    honnef.co/go/tools@v0.7.0 h1:w6WUp1VbkqPEgLz4rkBzH/CSU6HkoqNLp6GstyTx3lU=
    mvdan.cc/gofumpt@v0.9.2 h1:zsEMWL8SVKGHNztrx6uZrXdp7AX8r421Vvp23sz7ik4=
    mvdan.cc/xurls/v2@v2.6.0 h1:3NTZpeTxYVWNSokW3MKeyVkz/j7uYXYiMtXRUfmjbgI=
    go: go1.26.4
• Run code -v or code-insiders -v to get version of VS Code or VS Code Insiders.
  • 1.123.0
    6a44c352bd24569c417e530095901b649960f9f8
    x64
• Check your installed extensions to get the version of the VS Code Go extension
  • 0.52.2
• 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\peter\go
GOROOT: C:\Program Files\Go
PATH:

Tools

go:	C:\Program Files\Go\bin\go.exe: go version go1.26.4 windows/amd64

gotests:	C:\Users\peter\go\bin\gotests.exe	(version: v1.6.0 built with go: go1.26.4)
impl:	C:\Users\peter\go\bin\impl.exe	(version: v1.4.0 built with go: go1.26.4)
goplay:	C:\Users\peter\go\bin\goplay.exe	(version: v1.0.0 built with go: go1.26.4)
dlv:	C:\Users\peter\go\bin\dlv.exe	(version: v1.26.3 built with go: go1.26.4)
gopls:	C:\Users\peter\go\bin\gopls.exe	(version: v0.22.0 built with go: go1.26.4)

Go env

Workspace Folder (libdns-loopia): d:\Code\GH\kmpm\caddystuff\libdns-loopia

set AR=ar
set CC=gcc
set CGO_CFLAGS=-O2 -g
set CGO_CPPFLAGS=
set CGO_CXXFLAGS=-O2 -g
set CGO_ENABLED=0
set CGO_FFLAGS=-O2 -g
set CGO_LDFLAGS=-O2 -g
set CXX=g++
set GCCGO=gccgo
set GO111MODULE=
set GOAMD64=v1
set GOARCH=amd64
set GOAUTH=netrc
set GOBIN=
set GOCACHE=C:\Users\peter\AppData\Local\go-build
set GOCACHEPROG=
set GODEBUG=
set GOENV=C:\Users\peter\AppData\Roaming\go\env
set GOEXE=.exe
set GOEXPERIMENT=
set GOFIPS140=off
set GOFLAGS=
set GOGCCFLAGS=-m64 -fno-caret-diagnostics -Qunused-arguments -Wl,--no-gc-sections -fmessage-length=0 -ffile-prefix-map=C:\Users\peter\AppData\Local\Temp\go-build693826569=/tmp/go-build -gno-record-gcc-switches
set GOHOSTARCH=amd64
set GOHOSTOS=windows
set GOINSECURE=
set GOMOD=d:\Code\GH\kmpm\caddystuff\libdns-loopia\go.mod
set GOMODCACHE=C:\Users\peter\go\pkg\mod
set GONOPROXY=
set GONOSUMDB=
set GOOS=windows
set GOPATH=C:\Users\peter\go
set GOPRIVATE=
set GOPROXY=https://proxy.golang.org,direct
set GOROOT=C:\Program Files\Go
set GOSUMDB=sum.golang.org
set GOTELEMETRY=local
set GOTELEMETRYDIR=C:\Users\peter\AppData\Roaming\go\telemetry
set GOTMPDIR=
set GOTOOLCHAIN=auto
set GOTOOLDIR=C:\Program Files\Go\pkg\tool\windows_amd64
set GOVCS=
set GOVERSION=go1.26.4
set GOWORK=
set PKG_CONFIG=pkg-config

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]": {
        "editor.insertSpaces": false,
        "editor.formatOnSave": true,
        "editor.codeActionsOnSave": {
            "source.organizeImports": "explicit"
        },
        "editor.suggest.snippetsPreventQuickSuggestions": false
    }
}

launch.json

{
    "version": "0.2.0",
    "configurations": [
        {
            "name": "Launch Package",
            "type": "go",
            "request": "launch",
            "mode": "auto",
            "program": "${fileDirname}",
            "envFile": "${workspaceFolder}/.env",
        }
    ]
}

Describe the bug

Trying to debug any go code in windows fails with a message box saying
couldn't start dlv dap: connection timeout where I can choose to edit launch.json or cancel.
This started to happen after update to vscode 1.123.0 but I also updated to go from 1.26.4 from 1.26.3 in the same time period so that might affect.

Debuging on the same computer but in a devcontainer works but nothing in plain Windows 11 that worked before.

• I have reinstalled the extension, several times.
• I'v disabled firewall without any difference.
• I can see that dlv.exe launches in the debug console and I can seen that the process keeps runing in Windows Activity Monitor. And it lauches fairly fast, <5 sec.

Starting: C:\Users\peter\go\bin\dlv.exe dap --listen=127.0.0.1:20300 from D:\Code\GH\kmpm\caddystuff\libdns-loopia\.vscode
DAP server listening at: 127.0.0.1:20300

Steps to reproduce the behavior:

1. Go to the go file that you want to launch/debug
2. Press F5 for Start Debugging
3. See error couldn't start dlv dap: connection timeout

Screenshots or recordings

If applicable, add screenshots or recordings to help explain your problem.

[kmpm]

Works again in vscode 1.124.0