Re: A weird bug of grep completion

[Daniel Shahaf <d.s@xxxxxxxxxxxxxxxxxx>]

Joey Pabalinas wrote on Fri, 27 Jul 2018 16:34 -1000:
> On July 27, 2018 4:28:27 PM Joseph Lee <cgjosephlee@xxxxxxxxx> wrote:
> 
> > Dear all,
> > I'm using macOS 10.13.6, zsh 5.5.1 (x86_64-apple-darwin16.7.0) and grep (GNU grep) 3.1 packaged by Homebrew.
> > A weird behavior happened when completing `grep --no-*` arguments.
> > While typing `--no-group-separator`, which is a GNU only argument, after another `--no-*`, the cursor stoped in a wrong place and unable to finish completion. But it works right when `--no-group-separator` goes ahead.
> >
> > Words might not be clear, so here's a demo video:
> > https://streamable.com/bxbdv
> >
> > I would appreciate any ideas, thank you.
> 
> You ended up with your cursor one to the left of a - (you can see it 
> within the block cursor) and that would cause completion to behave a bit 
> oddly depending on setopts.

To clarify: the bug report is that «grep --no-filename --no<TAB>» appends
a hyphen to $BUFFER but leaves $CURSOR as it was, after the second "--no"
rather than after the newly-added hyphen.

There's no option whose name is of the form /^--no[^-].*/, so this does seem to
be a bug.