bug#51473: [PATCH] Enable xwidget scrolling optimizations, and other xwidgets improvements

[Eli Zaretskii]

> Cc: 51473@debbugs.gnu.org
> Date: Sat, 06 Nov 2021 13:39:34 +0800
> From:  Po Lu via "Bug reports for GNU Emacs,
>  the Swiss army knife of text editors" <bug-gnu-emacs@gnu.org>
> 
> So I think it should be documented in etc/PROBLEMS instead.  Something
> along the lines of:
> 
> ** Emacs crashes with SIGTRAP when trying to start an WebKit xwidget.
> 
> The version of WebKitGTK installed on your system is buggy, and errors
> out trying to start a subprocess through bubblewrap.  You can prevent
> the buggy code from being executed by setting the environment variables
> `SNAP', `SNAP_NAME' and `SNAP_REVISION', which tricks WebKit into
> thinking Emacs is running in snap and makes it use GLib to launch
> subprocesses instead.
> 
> WDYT?

Thanks, I added an entry in PROBLEMS along those lines.