Go Debugging using dlv breaks at runtime.gopark instead of proper breakpoint place

[kmmkwong]

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 go1.23.4 darwin/arm64
• Run gopls -v version to get version of Gopls from the VS Code integrated terminal.
  • Build info

---

golang.org/x/tools/gopls v0.18.1
golang.org/x/tools/gopls@v0.18.1 h1:2xJBNzdImS5u/kV/ZzqDLSvlBSeZX+pWY9uKVP7Pask=
github.com/BurntSushi/toml@v1.4.1-0.20240526193622-a339e1f7089c h1:pxW6RcqyfI9/kWtOwnv/G+AzdKuy2ZrqINhenH4HyNs=
github.com/google/go-cmp@v0.6.0 h1:ofyhxvXcZhMsU5ulbFiLKl/XBFqE1GSq7atu8tAmTRI=
golang.org/x/exp/typeparams@v0.0.0-20241210194714-1829a127f884 h1:1xaZTydL5Gsg78QharTwKfA9FY9CZ1VQj6D/AZEvHR0=
golang.org/x/mod@v0.23.0 h1:Zb7khfcRGKk+kqfxFaP5tZqCnDZMjC5VtUBs87Hr6QM=
golang.org/x/sync@v0.11.0 h1:GGz8+XQP4FvTTrjZPzNKTMFtSXH80RAzG+5ghFPgK9w=
golang.org/x/telemetry@v0.0.0-20241220003058-cc96b6e0d3d9 h1:L2k9GUV2TpQKVRGMjN94qfUMgUwOFimSQ6gipyJIjKw=
golang.org/x/text@v0.22.0 h1:bofq7m3/HAFvbF51jz3Q9wLg3jkvSPuiZu/pD1XwgtM=
golang.org/x/tools@v0.30.1-0.20250221230316-5055f70f240c h1:Ja/5gV5a9Vvho3p2NC/T2TtxhHjrWS/2DvCKMvA0a+Y=
golang.org/x/vuln@v1.1.3 h1:NPGnvPOTgnjBc9HTaUx+nj+EaUYxl5SJOWqaDYGaFYw=
honnef.co/go/tools@v0.5.1 h1:4bH5o3b5ZULQ4UrBmP+63W9r7qIkqJClEA9ko5YKx+I=
mvdan.cc/gofumpt@v0.7.0 h1:bg91ttqXmi9y2xawvkuMXyvAA/1ZGJqYAEGjXuP0JXU=
mvdan.cc/xurls/v2@v2.5.0 h1:lyBNOm8Wo71UknhUs4QTFUNNMyxy2JEIaKKo0RWOh+8=
go: go1.23.4

• Run code -v or code-insiders -v to get version of VS Code or VS Code Insiders.
  • VSCode Version: 1.96.2
• Check your installed extensions to get the version of the VS Code Go extension
  • 0.46.1
• Run Ctrl+Shift+P (Cmd+Shift+P on Mac OS) > Go: Locate Configured Go Tools command.

  • Tools Configuration

Environment

GOBIN: undefined
toolsGopath:
gopath: /Users/mary.wong/go/1.23.4
GOROOT: /Users/mary.wong/.goenv/versions/1.23.4
PATH: /Users/mary.wong/.goenv/versions/1.23.4/bin:/Users/mary.wong/.pyenv/shims:/Users/mary.wong/.goenv/bin:/Users/mary.wong/Library/Python/3.9/bin:/usr/local/bin:/usr/bin:/usr/local/bin:/opt/homebrew/bin:/opt/homebrew/sbin:/usr/local/bin:/System/Cryptexes/App/usr/bin:/usr/bin:/bin:/usr/sbin:/sbin:/var/run/com.apple.security.cryptexd/codex.system/bootstrap/usr/local/bin:/var/run/com.apple.security.cryptexd/codex.system/bootstrap/usr/bin:/var/run/com.apple.security.cryptexd/codex.system/bootstrap/usr/appleinternal/bin:/Library/Apple/usr/bin:/Users/mary.wong/.local/bin:/Users/mary.wong/.goenv/shims:/Users/mary.wong/go/1.23.4/bin:/Applications/Postgres.app/Contents/Versions/latest/bin:/Users/mary.wong/.local/bin:/Users/mary.wong/src/tua-buf/node_modules/.bin
PATH (vscode launched with): /Users/mary.wong/.pyenv/shims:/Users/mary.wong/.goenv/versions/1.23.4/bin:/Users/mary.wong/.goenv/bin:/Users/mary.wong/Library/Python/3.9/bin:/usr/local/bin:/usr/bin:/usr/local/bin:/opt/homebrew/bin:/opt/homebrew/sbin:/usr/local/bin:/System/Cryptexes/App/usr/bin:/usr/bin:/bin:/usr/sbin:/sbin:/var/run/com.apple.security.cryptexd/codex.system/bootstrap/usr/local/bin:/var/run/com.apple.security.cryptexd/codex.system/bootstrap/usr/bin:/var/run/com.apple.security.cryptexd/codex.system/bootstrap/usr/appleinternal/bin:/Library/Apple/usr/bin:/Users/mary.wong/.local/bin:/Users/mary.wong/.goenv/shims:/Users/mary.wong/go/1.23.4/bin:/Applications/Postgres.app/Contents/Versions/latest/bin:/Users/mary.wong/.local/bin:/Users/mary.wong/src/tua-buf/node_modules/.bin

Tools

go:	/Users/mary.wong/.goenv/versions/1.23.4/bin/go: go version go1.23.4 darwin/arm64

gopls:	/Users/mary.wong/go/1.23.4/bin/gopls	(version: v0.18.1 built with go: go1.23.4)
gotests:	not installed
gomodifytags:	not installed
impl:	not installed
goplay:	not installed
dlv:	/Users/mary.wong/go/1.23.4/bin/dlv	(version: v1.24.1 built with go: go1.23.4)
staticcheck:	/Users/mary.wong/go/1.23.4/bin/staticcheck	(version: v0.6.0 built with go: go1.23.4)

Go env

Workspace Folder (tua-dqa-service): /Users/mary.wong/src/tua-dqa-service

GO111MODULE=''
GOARCH='arm64'
GOBIN=''
GOCACHE='/Users/mary.wong/Library/Caches/go-build'
GOENV='/Users/mary.wong/Library/Application Support/go/env'
GOEXE=''
GOEXPERIMENT=''
GOFLAGS=''
GOHOSTARCH='arm64'
GOHOSTOS='darwin'
GOINSECURE=''
GOMODCACHE='/Users/mary.wong/go/1.23.4/pkg/mod'
GONOPROXY='git.soma.salesforce.com'
GONOSUMDB='git.soma.salesforce.com'
GOOS='darwin'
GOPATH='/Users/mary.wong/go/1.23.4'
GOPRIVATE='git.soma.salesforce.com'
GOPROXY='https://proxy.golang.org,direct'
GOROOT='/Users/mary.wong/.goenv/versions/1.23.4'
GOSUMDB='sum.golang.org'
GOTMPDIR=''
GOTOOLCHAIN='auto'
GOTOOLDIR='/Users/mary.wong/.goenv/versions/1.23.4/pkg/tool/darwin_arm64'
GOVCS=''
GOVERSION='go1.23.4'
GODEBUG=''
GOTELEMETRY='local'
GOTELEMETRYDIR='/Users/mary.wong/Library/Application Support/go/telemetry'
GCCGO='gccgo'
GOARM64='v8.0'
AR='ar'
CC='clang'
CXX='clang++'
CGO_ENABLED='1'
GOMOD='/Users/mary.wong/src/tua-dqa-service/go.mod'
GOWORK=''
CGO_CFLAGS='-O2 -g'
CGO_CPPFLAGS=''
CGO_CXXFLAGS='-O2 -g'
CGO_FFLAGS='-O2 -g'
CGO_LDFLAGS='-O2 -g'
PKG_CONFIG='pkg-config'
GOGCCFLAGS='-fPIC -arch arm64 -pthread -fno-caret-diagnostics -Qunused-arguments -fmessage-length=0 -ffile-prefix-map=/var/folders/14/x057mqns7qvb_j0v_9k26td40000gn/T/go-build3853166858=/tmp/go-build -gno-record-gcc-switches -fno-common'

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.buildFlags": ["-gcflags=all=-N -l"]
}

Describe the bug

Go debugger is not able to break at the right place. Instead it keeps breaking on runtime.gopark, and there is no useful info. I tried disabling the go optimization in various ways including updating the settings.json file but no success. Debugger is completely unusable.

Note that it was working before, but at some time, it just stopped working. But I am not sure what has changed to trigger it.

Steps to reproduce the behavior:

Create a launch.json as usual and try to debug:

    // Use IntelliSense to learn about possible attributes.
    // Hover to view descriptions of existing attributes.
    // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
    "version": "0.2.0",
    "configurations": [
      {
        "name": "grpc",
        "type": "go",
        "request": "launch",
        "mode": "auto",
        "program": "cmd/...go",
        "cwd": "${workspaceFolder}",
        // "buildFlags": "-gcflags=all=-N -l",
        // "buildFlags": "-gcflags \"-N -l\"",
        "env": { ...

Screenshots or recordings

[aleti123]

I am also noticing the same. It was working before, suddenly it stopped working.

• Go version
  go version go1.23.0 darwin/arm64

• dlv version

Delve Debugger
Version: 1.24.0
Build: $Id: 2d55e4d30150e3fc68e64357e21293d7920fc1f1 $

[DennisMatveyev]

I think I have the same
just in case created -> #3747

[aol-nnov]

same here!

Worth to mention, debugging from console (i.e. dlv debug) works just fine. So, it's something to do with vscode extension!

Also reproducible on pre-release 0.47.1 version.

[aol-nnov]

Hmm.... It fails on MacOs, but works in devcontainer (which is a linux vm)

[w-zhCN]

Any solutions?..

[rafaelteicas]

same here!

Worth to mention, debugging from console (i.e. dlv debug) works just fine. So, it's something to do with vscode extension!

Also reproducible on pre-release 0.47.1 version.

I tried on GoLand and happened the same.

[firelizzard18]

I suspect this is related to go-delve/delve#3964. Given that it also occurs in GoLand, and based on #3747 appears to be macOS-specific and related to an OS upgrade strongly indicates that it's a macOS/delve issue. vscode uses dlv dap which has different code paths from dlv debug so it reasonably could be specific to DAP-mode which is why it would not occur when debugging with dlv debug.

[aol-nnov]

@firelizzard18 thanks for the hint! Just tried patched delve from the mentioned issue with latest xcode cli tools (16.3.0.0.1.1742442376) and it worked like a charm!

[firelizzard18]

I'm glad it helped 😄 For anyone else, here's a link to the patch and the developer's comment:

If someone is still experiencing this problem before updating to the newest XCode it would be helpful if they could try go-delve/delve#3966 and see if that also fixes their issues. If you are using Goland remember that you have to replace the delve executable it uses (it won't be enough to just have the patched delve in your path). If it doesn't work post logs with --log --log-output=dap,gdbwire,debugger if you are using vscode-go or --log --log-output=rpc,gdbwire,debugger if you are using goland.

[DennisMatveyev]

temporary solution is downgrade Xcode
go-delve/delve#3964 (comment)
or this
go-delve/delve#3964 (comment)

[findleyr]

AFAICT this is a logical dupe of go-delve/delve#3964, but I'll leave this open for tracking purposes.