Unhandled error in debug adapter: TypeError: Cannot read properties of undefined (reading 'addr')

[yairy]

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 go1.20.2 darwin/arm64
• Run gopls -v version to get version of Gopls from the VS Code integrated terminal.
  • Build info

---

golang.org/x/tools/gopls v0.13.2
golang.org/x/tools/gopls@v0.13.2 h1:Pyvx6MKvatbX3zzZmdGiFRfQZl0ohPlt2sFxO/5j6Ro=
github.com/BurntSushi/toml@v1.2.1 h1:9F2/+DoOYIOksmaJFPw1tGFy1eDnIJXg+UHjuD8lTak=
github.com/google/go-cmp@v0.5.9 h1:O2Tfq5qg4qc4AmwVlvv0oLiVAGB7enBSJ2x2DqQFi38=
github.com/sergi/go-diff@v1.1.0 h1:we8PVUC3FE2uYfodKH/nBHMSetSfHDR6scGdBi+erh0=
golang.org/x/exp@v0.0.0-20220722155223-a9213eeb770e h1:+WEEuIdZHnUeJJmEUjyYC2gfUMj69yZXw17EnHg/otA=
golang.org/x/exp/typeparams@v0.0.0-20221212164502-fae10dda9338 h1:2O2DON6y3XMJiQRAS1UWU+54aec2uopH3x7MAiqGW6Y=
golang.org/x/mod@v0.12.0 h1:rmsUpXtvNzj340zd98LZ4KntptpfRHwpFOHG188oHXc=
golang.org/x/sync@v0.3.0 h1:ftCYgMx6zT/asHUrPw8BLLscYtGznsLAnjq5RH9P66E=
golang.org/x/sys@v0.10.0 h1:SqMFp9UcQJZa+pmYuAKjd9xq1f0j5rLcDIk0mj4qAsA=
golang.org/x/text@v0.11.0 h1:LAntKIrcmeSKERyiOh0XMV39LXS8IE9UL2yP7+f5ij4=
golang.org/x/tools@v0.11.2-0.20230810185051-cc6b5804b8cf h1:Oush7UwPamr2/iNeNFBuNFj89YyHn0YY69EKDdvANnk=
golang.org/x/vuln@v0.0.0-20230110180137-6ad3e3d07815 h1:A9kONVi4+AnuOr1dopsibH6hLi1Huy54cbeJxnq4vmU=
honnef.co/go/tools@v0.4.2 h1:6qXr+R5w+ktL5UkwEbPp+fEvfyoMPche6GkOpGHZcLc=
mvdan.cc/gofumpt@v0.4.0 h1:JVf4NN1mIpHogBj7ABpgOyZc65/UUOkKQFkoURsz4MM=
mvdan.cc/xurls/v2@v2.4.0 h1:tzxjVAj+wSBmDcF6zBB7/myTy3gX9xvi8Tyr28AuQgc=
go: go1.20.2

• Run code -v or code-insiders -v to get version of VS Code or VS Code Insiders.

  • 1.81.1
    6c3e3dba23e8fadc360aed75ce363ba185c49794
    arm64

• Check your installed extensions to get the version of the VS Code Go extension

  • v0.39.1

• Run Ctrl+Shift+P (Cmd+Shift+P on Mac OS) > Go: Locate Configured Go Tools command.

  • Checking configured tools....
    GOBIN: undefined
    toolsGopath:
    gopath: /Users/yairyehuda/go
    GOROOT: /opt/homebrew/opt/go@1.20/libexec
    PATH: /opt/homebrew/opt/go@1.20/libexec/bin:/Users/yairyehuda/.nvm/versions/node/v16.19.1/bin:/Users/yairyehuda/Library/Caches/fnm_multishells/1625_1692648289542/bin:/Users/yairyehuda/.krew/bin:/opt/homebrew/Caskroom/google-cloud-sdk/latest/google-cloud-sdk/bin:/Users/yairyehuda/Library/Python/3.8/bin:/usr/local/sbin:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin:/opt/X11/bin:/usr/local/git/bin:/tools:/platform-tools:/Users/yairyehuda/bin:/opt/homebrew/bin:/opt/homebrew/sbin:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin:/usr/local/go/bin:/Users/yairyehuda/.fig/bin:/Users/yairyehuda/.local/bin:/Users/yairyehuda/go/bin:/platform-tools:/Users/yairyehuda/.fig/bin:/tools
    PATH (vscode launched with): /Users/yairyehuda/.nvm/versions/node/v16.19.1/bin:/Users/yairyehuda/Library/Caches/fnm_multishells/1625_1692648289542/bin:/Users/yairyehuda/.krew/bin:/opt/homebrew/Caskroom/google-cloud-sdk/latest/google-cloud-sdk/bin:/Users/yairyehuda/Library/Python/3.8/bin:/usr/local/sbin:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin:/opt/X11/bin:/usr/local/git/bin:/tools:/platform-tools:/Users/yairyehuda/bin:/opt/homebrew/bin:/opt/homebrew/sbin:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin:/usr/local/go/bin:/Users/yairyehuda/.fig/bin:/Users/yairyehuda/.local/bin:/Users/yairyehuda/go/bin:/opt/homebrew/opt/go@1.20/libexec/bin:/platform-tools:/Users/yairyehuda/.fig/bin:/opt/homebrew/opt/go@1.20/libexec/bin:/tools

  go: /opt/homebrew/opt/go@1.20/libexec/bin/go: go version go1.20.2 darwin/arm64

  gotests: /Users/yairyehuda/go/bin/gotests (version: v1.6.0 built with go: go1.20.2)
  gomodifytags: /Users/yairyehuda/go/bin/gomodifytags (version: v1.16.0 built with go: go1.20.2)
  impl: /Users/yairyehuda/go/bin/impl (version: v1.1.0 built with go: go1.20.2)
  goplay: /Users/yairyehuda/go/bin/goplay (version: v1.0.0 built with go: go1.20.2)
  dlv: /Users/yairyehuda/go/bin/dlv (version: v1.20.1 built with go: go1.20.2)
  staticcheck: /Users/yairyehuda/go/bin/staticcheck (version: v0.4.3 built with go: go1.20.2)
  gopls: /Users/yairyehuda/go/bin/gopls (version: v0.13.2 built with go: go1.20.2)

go env
Workspace Folder (multistage): /Users/yairyehuda/git/DemoApps/go/multistage
GO111MODULE=""
GOARCH="arm64"
GOBIN=""
GOCACHE="/Users/yairyehuda/Library/Caches/go-build"
GOENV="/Users/yairyehuda/Library/Application Support/go/env"
GOEXE=""
GOEXPERIMENT=""
GOFLAGS=""
GOHOSTARCH="arm64"
GOHOSTOS="darwin"
GOINSECURE=""
GOMODCACHE="/Users/yairyehuda/go/pkg/mod"
GONOPROXY="github.com/techvelocity/"
GONOSUMDB="github.com/techvelocity/"
GOOS="darwin"
GOPATH="/Users/yairyehuda/go"
GOPRIVATE="github.com/techvelocity/*"
GOPROXY="https://proxy.golang.org,direct"
GOROOT="/opt/homebrew/opt/go@1.20/libexec"
GOSUMDB="sum.golang.org"
GOTMPDIR=""
GOTOOLDIR="/opt/homebrew/opt/go@1.20/libexec/pkg/tool/darwin_arm64"
GOVCS=""
GOVERSION="go1.20.2"
GCCGO="gccgo"
AR="ar"
CC="clang"
CXX="clang++"
CGO_ENABLED="1"
GOMOD="/Users/yairyehuda/git/DemoApps/go/multistage/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 -fdebug-prefix-map=/var/folders/8j/3yxy6kp52rq6hbdjtc5qr5fw0000gn/T/go-build741162924=/tmp/go-build -gno-record-gcc-switches -fno-common"

Describe the bug

I'm getting the following exception when trying to debug a remote process:

Unhandled error in debug adapter: TypeError: Cannot read properties of undefined (reading 'addr')
    at GoDebugSession.convertDebugVariableToProtocolVariable (/Users/myname/.vscode/extensions/golang.go-0.39.1/dist/debugAdapter.js:17384:51)
    at /Users/myname/.vscode/extensions/golang.go-0.39.1/dist/debugAdapter.js:16864:59
    at process.processTicksAndRejections (node:internal/process/task_queues:96:5)
    at async Promise.all (index 1)

My debug configuration in launch.json is:

        {
            "name": "My Debug Session",
            "type": "go",
            "request": "attach",
            "mode": "remote",
            "remotePath": "",
            "cwd": "${workspaceFolder}",
            "port": 2345,
            "stopOnEntry": false,
            "host": "127.0.0.1",
            "showLog": true,
            "trace": "log"
        }

I see that a very similar issue was fixed here:
https://github.com/golang/vscode-go/pull/2618/files

However, the same problem exists here:
https://github.com/golang/vscode-go/blob/master/src/debugAdapter/goDebug.ts#L2343

if v.children is an empty array then v.children[0].addr will crash.

Reproduce steps:

For me, it happens when I start a remote debug session. After it connects successfully, I press the 'pause' button in the debug toolbar.

[findleyr]

CC @hyangah @suzmue

[hyangah]

Have you tried the delve DAP?

https://github.com/golang/vscode-go/wiki/debugging#remote-debugging
I think adding "debugAdapter": "dlv-dap" in the setting will select the delve DAP instead of the legacy debug adapter.

[yairy]

It doesn't crash anymore using dlv-dap, thank you!
I don't know if the legacy Debug Adapter is still maintained, but IMO it's worth fixing.

[findleyr]

Hi @yairy, unfortunately we don't have resources to address bugs with the legacy debug adapter; it will eventually be removed. Glad to hear the delve DAP adapter is working.

@hyangah assuming you agree, shall we close this?

[hyangah]

Thanks for letting us know dlv-dap works for you, @yairy

We are going to change the default debug adapter for remote debugging to the new dlv-dap. #2205

@findleyr Yes, let's close this.