bug#63589: [PATCH] 29.0.91; crash after creating graphical frames via emacsclient when compiled with cairo-xcb

[Thiago Melo]

(sorry, forgot to hit reply all)

> What I would like to understand is how come this didn't happen until
> now?  The Cairo build is the default since Emacs 28, is it not?

This is not just about cairo, but about cairo with xcb surfaces. It
was introduced in commit de614ec9, which is part of emacs 29. If I
understood well, previously, emacs + cairo used the xlib device only.

I'll write here again the link to the relevant discussion in the cairo
mailing list:

https://lists.cairographics.org/archives/cairo/2017-December/028491.html

Please do take a look. But to summarize: the cairo-xcb device is not
always destroyed when the display closes. However, the cairo-xlib
device is pretty much always destroyed.