From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Eli Zaretskii Newsgroups: gmane.emacs.bugs Subject: bug#21313: 25.0.50; Strange errors from dbus-handle-event Date: Fri, 16 Oct 2015 11:23:19 +0300 Message-ID: <83h9lr6x3c.fsf@gnu.org> References: <877foo4nkd.fsf@gnu.org> <8737xtt8wt.fsf@gnu.org> <834mi95bx1.fsf@gnu.org> <87twq9roxn.fsf@gnu.org> <83wpv53rjn.fsf@gnu.org> <87h9m9rmgk.fsf@gmx.de> <87wpv4qzm2.fsf@gnu.org> <87a8s0v1lp.fsf@gmx.de> <87twq8gyk0.fsf@gnu.org> <87lhbk47hb.fsf@gnu.org> <83d1ww4416.fsf@gnu.org> <878u75rctw.fsf@gnu.org> <836129xtx8.fsf@gnu.org> <876129gs2a.fsf@gnu.org> <83twptw81l.fsf@gnu.org> <87eggwuzvi.fsf@gnu.org> <83d1wg8403.fsf@gnu.org> <87twps9grg.fsf@gnu.org> <837fmn9as2.fsf@gnu.org> <87pp0fo1mo.fsf@gnu.org> <83pp0f70un.fsf@gnu.org> <871tcv5kaj.fsf@gnu.org> Reply-To: Eli Zaretskii NNTP-Posting-Host: plane.gmane.org X-Trace: ger.gmane.org 1444983865 7847 80.91.229.3 (16 Oct 2015 08:24:25 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Fri, 16 Oct 2015 08:24:25 +0000 (UTC) Cc: michael.albinus@gmx.de, 21313@debbugs.gnu.org To: Tassilo Horn Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Fri Oct 16 10:24:13 2015 Return-path: Envelope-to: geb-bug-gnu-emacs@m.gmane.org Original-Received: from lists.gnu.org ([208.118.235.17]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1Zn0JB-0001BK-5Y for geb-bug-gnu-emacs@m.gmane.org; Fri, 16 Oct 2015 10:24:13 +0200 Original-Received: from localhost ([::1]:51589 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Zn0JA-0007xW-Bc for geb-bug-gnu-emacs@m.gmane.org; Fri, 16 Oct 2015 04:24:12 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:39970) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Zn0J5-0007xR-Jl for bug-gnu-emacs@gnu.org; Fri, 16 Oct 2015 04:24:08 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1Zn0J0-0005mf-Ix for bug-gnu-emacs@gnu.org; Fri, 16 Oct 2015 04:24:07 -0400 Original-Received: from debbugs.gnu.org ([208.118.235.43]:34113) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Zn0J0-0005mb-Fh for bug-gnu-emacs@gnu.org; Fri, 16 Oct 2015 04:24:02 -0400 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.80) (envelope-from ) id 1Zn0J0-00044s-5d for bug-gnu-emacs@gnu.org; Fri, 16 Oct 2015 04:24:02 -0400 X-Loop: help-debbugs@gnu.org Resent-From: Eli Zaretskii Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Fri, 16 Oct 2015 08:24:02 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 21313 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: Original-Received: via spool by 21313-submit@debbugs.gnu.org id=B21313.144498383215658 (code B ref 21313); Fri, 16 Oct 2015 08:24:02 +0000 Original-Received: (at 21313) by debbugs.gnu.org; 16 Oct 2015 08:23:52 +0000 Original-Received: from localhost ([127.0.0.1]:53054 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.80) (envelope-from ) id 1Zn0Iq-00044U-01 for submit@debbugs.gnu.org; Fri, 16 Oct 2015 04:23:52 -0400 Original-Received: from mtaout28.012.net.il ([80.179.55.184]:34390) by debbugs.gnu.org with esmtp (Exim 4.80) (envelope-from ) id 1Zn0In-00044K-D6 for 21313@debbugs.gnu.org; Fri, 16 Oct 2015 04:23:50 -0400 Original-Received: from conversion-daemon.mtaout28.012.net.il by mtaout28.012.net.il (HyperSendmail v2007.08) id <0NWB000000L08Z00@mtaout28.012.net.il> for 21313@debbugs.gnu.org; Fri, 16 Oct 2015 11:22:36 +0300 (IDT) Original-Received: from HOME-C4E4A596F7 ([84.94.185.246]) by mtaout28.012.net.il (HyperSendmail v2007.08) with ESMTPA id <0NWB00DVF0LOP5A0@mtaout28.012.net.il>; Fri, 16 Oct 2015 11:22:36 +0300 (IDT) In-reply-to: <871tcv5kaj.fsf@gnu.org> X-012-Sender: halo1@inter.net.il X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.15 Precedence: list X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x X-Received-From: 208.118.235.43 X-BeenThere: bug-gnu-emacs@gnu.org List-Id: "Bug reports for GNU Emacs, the Swiss army knife of text editors" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Original-Sender: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.bugs:107669 Archived-At: > From: Tassilo Horn > Cc: michael.albinus@gmx.de, 21313@debbugs.gnu.org > Date: Fri, 16 Oct 2015 09:45:08 +0200 > > Ok, so QUIT; in C code basically means, here is a position where the > current lisp execution could be aborted. If it weren't in > print_object(), then you couldn't for example abort printing a list with > gazillions of elements and emacs would get stuck while doing so. Correct. > Looking at QUIT, the difference between my original code and the new one > is just when process_quit_flag() is called. process_quit_flag() always > signals quit. So with the new code, the signal is handled by the right > recipient. Who consumed (and discarded) it before? process_quit_flag itself: void process_quit_flag (void) { Lisp_Object flag = Vquit_flag; Vquit_flag = Qnil; <<<<<<<<<<<<<<<<<<<<<<< The gotcha here is that C-g is handled specially, i.e. not by process_quit_flag, during processing of user input. That special handling was bypassed because process_quit_flag attempted to process it too early, and reseted the flag afterwards, thus disabling that special processing. > Well, I think I just remember that I want to bind Qinhibit_quit to Qt > whenever I need to call Lisp functions from C. In debugging code that isn't supposed to disrupt the control flow, yes, that's a good rule. But if you write C code for "normal" processing, then no, don't inhibit quitting like that just because you call Lisp.