Re: emacs crashs when remote x-windows closes after make-frame-on-display even when other frame was closed due to assertion in xcd_xlib.c (!c->xlib.lock)

["Jan Djärv" <jan.h.d@swipnet.se>]

Can you put a break at the assertion position and get a backtrace when the 
assertion is hit?

	Jan D.

Richard Stallman skrev:
> Would someone please fix this, then ack?
> 
> To: bug-gnu-emacs@gnu.org
> From: Matan Ninio <emacs@cs.ng.ninio.org>
> Date: Mon, 15 Oct 2007 09:10:05 +0200
> MIME-Version: 1.0
> Content-Type: text/plain; charset=us-ascii
> Subject: emacs crashs when remote x-windows closes after
> 	make-frame-on-display even when other frame was closed due to
> 	assertion in xcd_xlib.c (!c->xlib.lock) 
> 
> 
> Please write in English if possible, because the Emacs maintainers
> usually do not have translators to read other languages for them.
> 
> Your bug report will be posted to the bug-gnu-emacs@gnu.org mailing list,
> and to the gnu.emacs.bug news group.
> 
> Please describe exactly what actions triggered the bug
> and the precise symptoms of the bug:
> 
> open emacs in X, make frame on display to some other display (either
> directly or via ssh -X -Y) with "make-frame-on-display".  Close the
> other frame.  all still OK.  close the other display (logout, kill X or
> kill ssh link), and emacs will crash with:
>   emacs: xcb_xlib.c:41: xcb_xlib_lock: Assertion `!c->xlib.lock' failed.
> 
> Similar problems happened with other applications when the system moved
> from xlib to xcb-xlib.  This is probably due to strict checking of
> actions that had been left unchecked in past versions of the library,
> and therefor should be considered an Emacs bug rather then a library
> bug.
>   
> 
> If Emacs crashed, and you have the Emacs process in the gdb debugger,
> please include the output from the following gdb commands:
>     `bt full' and `xbacktrace'.
> If you would like to further debug the crash, please read the file
> /usr/share/emacs/22.1/etc/DEBUG for instructions.
> 
> 
> In GNU Emacs 22.1.1 (i486-pc-linux-gnu, GTK+ Version 2.10.13)
>  of 2007-08-22 on raven, modified by Debian
> Windowing system distributor `The X.Org Foundation', version 11.0.10300000
> configured using `configure  '--build=i486-linux-gnu' '--host=i486-linux-gnu' '--prefix=/usr' '--sharedstatedir=/var/lib' '--libexecdir=/usr/lib' '--localstatedir=/var/lib' '--infodir=/usr/share/info' '--mandir=/usr/share/man' '--with-pop=yes' '--enable-locallisppath=/etc/emacs22:/etc/emacs:/usr/local/share/emacs/22.1/site-lisp:/usr/local/share/emacs/site-lisp:/usr/share/emacs/22.1/site-lisp:/usr/share/emacs/site-lisp:/usr/share/emacs/22.1/leim' '--with-x=yes' '--with-x-toolkit=gtk' '--with-toolkit-scroll-bars' 'build_alias=i486-linux-gnu' 'host_alias=i486-linux-gnu' 'CFLAGS=-DDEBIAN -g -O2''
> 
> Important settings:
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>   value of $LC_MESSAGES: nil
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>   value of $LC_NUMERIC: nil
>   value of $LC_TIME: nil
>   value of $LANG: en_US.UTF-8
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