Clikt doesn't print the correct help upon subcommand parse failure

[octylFractal]

If I make a subcommand (e.g. sub) with a required argument, and then do ./tool sub, it prints the following:

Usage: tool [OPTIONS] COMMAND [ARGS]...

Error: Missing argument "ARGUMENT".

The usage printed is for the main command, but the error concerns the subcommand. It's not immediately clear that the argument missing actually belongs to the subcommand, unless you do ./tool sub -h:

Usage: sub [OPTIONS] ARGUMENT

<help omitted>

Options:
  -h, --help  Show this message and exit

I think this should be changed to it's clear where the argument is coming from.

[ajalt]

So in that case, you'd like it to print this?

Usage: sub [OPTIONS] ARGUMENT

Error: Missing argument "ARGUMENT".

[octylFractal]

Specifically, I'd like it to use the same usage string as in the help: Usage: sub [OPTIONS] ARGUMENT (ninja'd!)

Yes, that's exactly what I'm looking for.

[ajalt]

Yeah, that's definitely more clear.