GNU bug report logs - #56792
29.0.50; Emacs crashes when selecting text if xfreerdp is also running

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Message #31 received at 56792-done <at> debbugs.gnu.org (full text, mbox):

From: Po Lu <luangruo <at> yahoo.com>
To: Lars Ingebrigtsen <larsi <at> gnus.org>
Cc: 56792-done <at> debbugs.gnu.org, David Welch <davidwelch158 <at> hotmail.com>
Subject: Re: bug#56792: 29.0.50; Emacs crashes when selecting text if
 xfreerdp is also running
Date: Thu, 28 Jul 2022 18:14:52 +0800

Lars Ingebrigtsen <larsi <at> gnus.org> writes:

> Po Lu via "Bug reports for GNU Emacs, the Swiss army knife of text
> editors" <bug-gnu-emacs <at> gnu.org> writes:
>
>> The PGTK build does not support X11, so you should build without PGTK
>> enabled.  This crash is known to happen there, and will not be fixed,
>> since adding 300-400 lines of X specific selection code to the PGTK port
>> seems very irrational for a platform that it is not intended to support.
>
> Emacs shouldn't segfault, though.  It's fine to signal an error in this
> situation, but segfaulting is not.

The segfault (which is really not a segfault, just GDK displaying a
window system error and aborting in an unusual manner) is hard to avoid
without adding X specific error handling code
(gdk_x11_display_error_trap_push).  Which will then add a dependency on
the X11-specific parts of GDK, and won't work if Emacs did not see them
at build-time.

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