Unhelpful error message when program is not full path in launch.config

Summery

When using delve in vscode, I got Failed to continue: "Error: spawn /usr/local/bin/dlv ENOENT" error. Using command line to launch delve works as expected.

Reproduction

1. Clone https://github.com/surajbarkale-dolby/gb-example/tree/vscode
2. Execute debug.sh to launch delve to verify that delve works
3. Launch visual studio code (preferably using code .)
4. Try launching debugger by pressing F5

[ramya-rao-a]

Can you run which dlv in your command line and see if the value is /usr/local/bin/dlv?

Yes I installed it using brew and it is located at /usr/local/bin/dlv. The reported version is 0.12.1 with build version v0.12.1.

The fix is to use full path of executable for "program" key in launch configuration (see this diff).

Thanks to your instructions about debugging the debugger, I was able to pinpoint root cause of this issue. In goDebug.ts, program name is not added to command line (as I did in debug.sh). Instead, vscode-go tries to change directory to the one containing program argument. However, the directory is not valid causing ENOENT error.

We should improve the documentation and add a better error message in goDebug.ts instead of ignoring the error.

I shall try to send a pull request with the change tomorrow.

[ramya-rao-a]

Thanks @surajbarkale-dolby !

Yes, the program key needs to be a full path. I just added a line about this in the wiki

The debugging part of the extension needs some work, we have been trying to improve it in the last few weeks.

Looking forward to your PR.

[ramya-rao-a]

Fixed in the latest update (0.6.54) to the Go extension.