Lua debugging with local-lua-debugger failing

[eduardomezencio]

Hi! I have followed the instructions here to configure the adapter and then created configurations based on the instructions in local-lua-debugger's repo. I've tried debugging regular lua code and also debugging a love2d game, but the same problem happens in both. As soon as I call require('dap').continue(), I get the message node exited with code: 1 and nothing else.

After failing a lot, I tried to intercept the stdin and stdout of the debugger to investigate. As far as I understand, it seems to exchange the first messages normally and then exit with no apparent reason, but since I don't know much about DAP, I'm pasting it here so you can analyze

debugger's stdin:

Content-Length: 349

{"command":"initialize","arguments":{"supportsProgressReporting":true,"supportsStartDebuggingRequest":true,"locale":"en_US.UTF-8","clientID":"neovim","clientName":"neovim","adapterID":"nvim-dap","pathFormat":"path","columnsStartAt1":true,"linesStartAt1":true,"supportsRunInTerminalRequest":true,"supportsVariableType":true},"seq":1,"type":"request"}

Content-Length: 161

{"command":"launch","arguments":{"program":{"lua":"lua5.4","file":"main.lua"},"name":"debug lua","request":"launch","type":"lua-local"},"seq":2,"type":"request"}

Content-Length: 56

{"command":"configurationDone","seq":3,"type":"request"}

debugger's stdout:

Content-Length: 260

{"seq":1,"type":"response","request_seq":1,"command":"initialize","success":true,"body":{"supportsConfigurationDoneRequest":true,"supportsEvaluateForHovers":true,"supportsSetVariable":true,"supportsTerminateRequest":true,"supportsConditionalBreakpoints":true}}

Content-Length: 46

{"seq":2,"type":"event","event":"initialized"}

Content-Length: 88

{"seq":3,"type":"response","request_seq":3,"command":"configurationDone","success":true}

This is all I have. Can anyone help me?

[mfussenegger]

Could you also post the :DapShowLog output?

I managed to reproduce the error only if I left out the cwd property in the configuration. Maybe you're missing that?
It resulted in this message:

[ ERROR ] 2024-06-01T11:07:32Z+0200 ] ...fig/nvim/pack/plugins/start/nvim-dap/lua/dap/session.lua:1463 ]	"stderr"	{
  command = "local-lua-dbg",
  enrich_config = <function 1>,
  type = "executable"
}	"node:path:1160\n    validateString(path, 'path');\n    ^\n\nTypeError [ERR_INVALID_ARG_TYPE]: The \"path\" argument must be of type string. Received undefined\n    at Object.isAbsolute (node:path:1160:5)\n    at LuaDebugSession.<anonymous> (/usr/lib/node_modules/local-lua-debugger-vscode/extension/luaDebugSession.js:151:23)\n    at Generator.next (<anonymous>)\n    at fulfilled (/usr/lib/node_modules/local-lua-debugger-vscode/extension/luaDebugSession.js:26:58)\n    at process.processTicksAndRejections (node:internal/process/task_queues:95:5) {\n  code: 'ERR_INVALID_ARG_TYPE'\n}\n\nNode.js v22.2.0\n"
[ INFO ] 2024-06-01T11:07:32Z+0200 ] ...fig/nvim/pack/plugins/start/nvim-dap/lua/dap/session.lua:1436 ]	"Process closed"	21137

To fix it and get it working I then used a .vscode/launch.json like:

{
  "version": "0.2.0",
  "configurations": [
    {
      "name": "Debug Love",
      "type": "local-lua",
      "request": "launch",
      "cwd": "${workspaceFolder}",
      "program": {
        "command": "love"
      },
      "args": [
        "."
      ],
      "scriptRoots": [
        "game"
      ]
    }
  ]
}

And a main.lua:

if os.getenv("LOCAL_LUA_DEBUGGER_VSCODE") == "1" then
  require("lldebugger").start()
end
local love = require("love")

function love.draw()
  love.graphics.print("Hello World!", 400, 300)
end

[eduardomezencio]

You're right, by just adding cwd to the configuration, it worked. Thank you!