Re: auto-complete popup is broken on master

[Eli Zaretskii]

> From: John Shahid <jvshahid@gmail.com>
> Date: Mon, 25 Jun 2018 15:49:06 +0000
> 
> The candidates in the auto-complete popup aren't aligned properly. This
> seems to be a result of the change in the behavior of
> `vertical-motion'. auto-complete tries to move vertically by getting the
> column using `(car (posn-col-row (posn-at-point)))' then use the col
> number as follows `(vertical-motion '(COL 1))'. This works as expected
> on `4a7e74fea687011ee81dcbb02294bccd99b3a05f` but its behavior has
> changed on master. Current master doesn't take into account
> display-line-number width. Was that an intentional change ? If so, what
> is the recommended way to get the previous behavior ?

Thanks.  This is not the right place for reporting bugs, certainly not
about the development codebase.  Please submit a bug report using
report-emacs-bug, and please include there a recipe to reproduce the
problem starting from "emacs -Q".

(I think what you describe is not a bug, but it's hard to tell without
all the details.  Also, the commit you mention is quite old.)

> While debugging this issue I also noticed that auto-complete popup-el
> use overlay 'prefix property which isn't documented.

Can you point at places in auto-complete which are using that
property?