From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED!not-for-mail From: Eli Zaretskii Newsgroups: gmane.emacs.bugs Subject: bug#25172: 26.0.50; Concurrency feature, sit-for doesn't work (crashing and unexpected behaviour) Date: Tue, 13 Dec 2016 18:23:46 +0200 Message-ID: <83h967bxwt.fsf@gnu.org> References: <838trme4jr.fsf@gnu.org> <838trlcals.fsf@gnu.org> <83vauobiou.fsf@gnu.org> Reply-To: Eli Zaretskii NNTP-Posting-Host: blaine.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit X-Trace: blaine.gmane.org 1481646333 21927 195.159.176.226 (13 Dec 2016 16:25:33 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Tue, 13 Dec 2016 16:25:33 +0000 (UTC) Cc: 25172@debbugs.gnu.org, clement.pit@gmail.com To: Elias =?UTF-8?Q?M=C3=A5rtenson?= Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Tue Dec 13 17:25:23 2016 Return-path: Envelope-to: geb-bug-gnu-emacs@m.gmane.org Original-Received: from lists.gnu.org ([208.118.235.17]) by blaine.gmane.org with esmtp (Exim 4.84_2) (envelope-from ) id 1cGpt8-0003dk-3J for geb-bug-gnu-emacs@m.gmane.org; Tue, 13 Dec 2016 17:25:10 +0100 Original-Received: from localhost ([::1]:39269 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1cGptB-0001qT-Cm for geb-bug-gnu-emacs@m.gmane.org; Tue, 13 Dec 2016 11:25:13 -0500 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:59779) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1cGpt4-0001oS-Lz for bug-gnu-emacs@gnu.org; Tue, 13 Dec 2016 11:25:07 -0500 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1cGpt0-0002O5-Pi for bug-gnu-emacs@gnu.org; Tue, 13 Dec 2016 11:25:06 -0500 Original-Received: from debbugs.gnu.org ([208.118.235.43]:53742) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1cGpt0-0002O1-MQ for bug-gnu-emacs@gnu.org; Tue, 13 Dec 2016 11:25:02 -0500 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1cGpt0-0000Mc-GS for bug-gnu-emacs@gnu.org; Tue, 13 Dec 2016 11:25:02 -0500 X-Loop: help-debbugs@gnu.org Resent-From: Eli Zaretskii Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Tue, 13 Dec 2016 16:25:02 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 25172 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: Original-Received: via spool by 25172-submit@debbugs.gnu.org id=B25172.14816462451333 (code B ref 25172); Tue, 13 Dec 2016 16:25:02 +0000 Original-Received: (at 25172) by debbugs.gnu.org; 13 Dec 2016 16:24:05 +0000 Original-Received: from localhost ([127.0.0.1]:40908 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1cGps4-0000LR-Rw for submit@debbugs.gnu.org; Tue, 13 Dec 2016 11:24:05 -0500 Original-Received: from eggs.gnu.org ([208.118.235.92]:40310) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1cGps3-0000Ky-TW for 25172@debbugs.gnu.org; Tue, 13 Dec 2016 11:24:04 -0500 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1cGprt-00025c-0c for 25172@debbugs.gnu.org; Tue, 13 Dec 2016 11:23:58 -0500 Original-Received: from fencepost.gnu.org ([2001:4830:134:3::e]:46986) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1cGprs-00025Y-Tw; Tue, 13 Dec 2016 11:23:52 -0500 Original-Received: from 84.94.185.246.cable.012.net.il ([84.94.185.246]:2231 helo=home-c4e4a596f7) by fencepost.gnu.org with esmtpsa (TLS1.2:RSA_AES_256_CBC_SHA1:256) (Exim 4.82) (envelope-from ) id 1cGprs-0004Vy-7w; Tue, 13 Dec 2016 11:23:52 -0500 In-reply-to: (message from Elias =?UTF-8?Q?M=C3=A5rtenson?= on Tue, 13 Dec 2016 12:14:44 +0800) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] 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" Xref: news.gmane.org gmane.emacs.bugs:126985 Archived-At: > From: Elias Mårtenson > Date: Tue, 13 Dec 2016 12:14:44 +0800 > Cc: Clément Pit--Claudel , > 25172@debbugs.gnu.org > > This is the gdb output for the SIGSEV case. Note that there is a summary of all the threads first, and then the > "bt full" output: There's something here I don't understand. It looks like 9 threads are stuck in acquire_global_lock, which is fine. The main thread was executing some timer (probably, the one set up by global-eldoc-mode), when it was delivered SIGSEGV. There's one more thread running this: Stack trace of thread 23775: #0 0x00007f5687e5e426 __sigsuspend (libc.so.6) #1 0x0000000000578385 deliver_thread_signal (emacs-26.0.50) #2 0x00000000005783f8 deliver_fatal_thread_signal (emacs-26.0.50) #3 0x00000000005785ae handle_sigsegv (emacs-26.0.50) #4 0x00007f5688810080 n/a (libpthread.so.0) This seems to be some thread, which was hit by SIGSEGV, and since it is not the main thread, it calls pdthread_kill to kill the main thread, which explains why the main thread received the signal. But what I don't understand is what was this thread 23775 doing before it hit SIGSEGV? The backtrace stops at handle_sigsegv, without revealing that. (There are three more threads calling 'poll', probably started by Glib/GTK.) Bottom line, I'm unsure what could be the reason for this one.