Problem debugging Deno using VSCode on Ubuntu 20.04 LTS running inside WSL-2: --inspect-brk being removed

user_1763257 0
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I am trying to debug Deno using VSCode on Ubuntu 20.04 LTS running inside WSL-2. I setup my launch.json as described in the Deno manual:

{
    "version": "0.2.0",
    "configurations": [
        {
            "name": "Deno",
            "type": "node",
            "request": "launch",
            "cwd": "${workspaceFolder}",
            "runtimeExecutable": "deno",
            "runtimeArgs": ["run", "--inspect-brk", "-A", "${fileBasename}"],
            "outputCapture": "std",
            "port": 9229
        }
    ]
}

however when I launch Deno the "--inspect-brk" option is being stripped out from the command used to launch Deno. If I modify my launch.json to change the option to "inspect-brk" (removing the leading --) the option shows up on the command line and I get the error:

Cannot resolve module "file:///mnt/c/Users/mlwp/projects/deno/inspect-brk"

Similarly if I change the name of the option to be "--inspect-brk-fun" then I get the message:

Found argument '--inspect-brk-fun' which wasn't expected, or isn't valid in this context

Anyone know why VSCode would strip the option or how to debug this

wsl-2 deno visual-studio-code
1 Answers

The cause of your issue was an incompatibility with --inspect-brk in previous versions of the VSCode JavaScript debugger. It has been fixed some time ago and so have the Deno docs on this matter, where the value of type has changed and port has been replaced with attachSimplePort in launch.json:

{
  "version": "0.2.0",
  "configurations": [
    {
      "name": "Deno",
      "type": "pwa-node",
      "request": "launch",
      "cwd": "${workspaceFolder}",
      "runtimeExecutable": "deno",
      "runtimeArgs": ["run", "--inspect-brk", "-A", "${file}"],
      "attachSimplePort": 9229
    }
  ]
}

However, I've found that using your current configuration should also work on newer releases (1.47+) of VSCode (running on Ubuntu 20.04 in WSL 2).

user_127692880
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