On Tue, Jun 12, 2018 at 09:02:35PM +0100, Jimmy Yuen Ho Wong wrote:
> >> Case 2 repro:
> >>
> >> Put this into your init file:
> >>
> >> (set-fontset-font "fontset-default" 'unicode "Apple Color Emoji" nil
> >> 'append)
> >>
> >> Crashes on start up.
> > Again I can’t reproduce it. Do you have anything else in your init.el
> > that might try to display an emoji or similar? In fact, you’ve got the
> > colour emoji patch applied, right? I wonder if that changes
> > something...
> Yes I have MacPort's multifonts_color patch applied.

It doesn’t make any difference here. It’s odd. Can you reproduce the
crash using -Q?

Do you have symbola installed?

> >> Case 3 repro:
> >>
> >> 1. Goto System Preferences > Keyword and turn on Show keyboard and emoji
> >> viewers in menu bar.
> >> 2. Go to emacs NS port, turn on Show Emoji & Symbols to get the emoji
> >> viewer out, insert some Emoji
> >> 3. Internal Error dialog pops up, Emacs caught the crash this time.
> > This isn’t a crash, right? I’m pretty sure this is fixed in master,
> > specifically commit 703ac3ea1c1ce381f385469a0e88bc29d3fe83c2. I think
> > this should be easily back ported to Emacs 26 if it’s causing crashes.
> This is a crash, but not a fatal crash, it's the Emacs NS port or Cocoa
> caught it and popped up an Internal Error dialog. For the dialog I can
> choose to let it crash the entire process or continue and ignore it.

Two patches attached which I believe fix this in emacs-26. I think
they’re safe. The second patch is part of commit
1daac66a6eedbcbfa32ab920b5c579872d989517 on master, but it adds a new
feature, so probably shouldn’t be applied in full.

-- 
Alan Third