When launching PTVSD fails, debugging stops silently in VS Code Debugger

[DonJayamanne]

• I'm using the ptvsd_launcher.py to launch the debugger
• I've created a simple python file with mixed indentation (using spaces and tabs)
• When launching the debugger, the process falls over simply because the code is buggy.
• However what's interesting is PTVSD has managed to connect and send and receive protocol messages, unfortunately it doesn't know anything about the errors.

Looking at the code, there doesn't seem to be any exception handling around the launching of a file. I could be mistaken.

I could ready stderr output from the process and display that when the process exits.
Though this isn't a clean approach, it isn't really possible today due to the noise printed out into stdout and stderr by pydevd.

@karthiknadig How does PTVS handle this scenario?

[int19h]

stderr would be a dead end, since we don't control what the user code is printing out, even ignoring pydevd.

This should be reported similar to any other exception. I would have expected pydevd to handle it via the normal exception reporting channels, but we might need to special-case errors coming out of parsing. Either way, from VS and VSC perspective, they shouldn't need any special handling.

[int19h]

I'm not seeing the repro anymore - instead, SyntaxError is reported as a regular exception: