bug#32932: 27.0.50; render bugs on macOS Mojave

[Aaron Jensen <aaronjensen@gmail.com>]

On November 3, 2018 at 1:51:24 PM, Alan Third
(alan@idiocy.org(mailto:alan@idiocy.org)) wrote:

> On Sat, Nov 03, 2018 at 07:09:45PM +0000, Alan Third wrote:
> > > Alan, would it help if you had access to my emacs config? Maybe then
> > > you could reproduce the exact thing on your machine?
> >
> > We could certainly give it a go.
>
> Actually, before that, can you try moving the call to
> ns_reset_clipping back above draw_phys_cursor_glyph in
> ns_draw_window_cursor?

This did not help.

For my config, it turns out that spacemacs out of the box can reproduce this.

1. Back up your .emacs.d
2. git clone https://github.com/syl20bnr/spacemacs ~/.emacs.d
3. cd ~/.emacs.d
4. git checkout develop
5. emacs
6. Pick all the defaults for the setup (picking VIM is important, it
may be that evil is an important part of the repro for this)
7. Let it install packages, you may need to SPC q q then restart emacs
to let it finish
8. SPC f f
9. Navigate to a directory that has images in it and press enter
10. Use j/k to select an image in the dired and press enter

I’ve seen it blank from the cursor to the end of the line, from the
cursor to the beginning of the line and the entire line. I don’t know
how/why it does one or the other. It only does it once per image. If
you have several images in a single folder you could reproduce it
multiple times.

Hopefully that helps.

Aaron