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#17713: Compressed Forms of 'backtrace' and 'bt full' output Date: Fri, 06 Jun 2014 10:56:31 +0300 Message-ID: <83k38u4gk0.fsf@gnu.org> References: Reply-To: Eli Zaretskii NNTP-Posting-Host: plane.gmane.org X-Trace: ger.gmane.org 1402041447 3672 80.91.229.3 (6 Jun 2014 07:57:27 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Fri, 6 Jun 2014 07:57:27 +0000 (UTC) Cc: 17713@debbugs.gnu.org To: Geoff Shannon , David Kastrup Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Fri Jun 06 09:57:18 2014 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 1Wsp1a-0004o2-4A for geb-bug-gnu-emacs@m.gmane.org; Fri, 06 Jun 2014 09:57:18 +0200 Original-Received: from localhost ([::1]:45683 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Wsp1Z-0006q6-F0 for geb-bug-gnu-emacs@m.gmane.org; Fri, 06 Jun 2014 03:57:17 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:36561) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Wsp1R-0006p1-Ax for bug-gnu-emacs@gnu.org; Fri, 06 Jun 2014 03:57:15 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1Wsp1K-0003c7-Ft for bug-gnu-emacs@gnu.org; Fri, 06 Jun 2014 03:57:09 -0400 Original-Received: from debbugs.gnu.org ([140.186.70.43]:47605) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Wsp1K-0003c3-CX for bug-gnu-emacs@gnu.org; Fri, 06 Jun 2014 03:57:02 -0400 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.80) (envelope-from ) id 1Wsp1K-00067X-0W for bug-gnu-emacs@gnu.org; Fri, 06 Jun 2014 03:57:02 -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, 06 Jun 2014 07:57:01 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 17713 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: Original-Received: via spool by 17713-submit@debbugs.gnu.org id=B17713.140204141023498 (code B ref 17713); Fri, 06 Jun 2014 07:57:01 +0000 Original-Received: (at 17713) by debbugs.gnu.org; 6 Jun 2014 07:56:50 +0000 Original-Received: from localhost ([127.0.0.1]:46482 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.80) (envelope-from ) id 1Wsp17-00066w-W2 for submit@debbugs.gnu.org; Fri, 06 Jun 2014 03:56:50 -0400 Original-Received: from mtaout22.012.net.il ([80.179.55.172]:59799) by debbugs.gnu.org with esmtp (Exim 4.80) (envelope-from ) id 1Wsp15-00066S-He for 17713@debbugs.gnu.org; Fri, 06 Jun 2014 03:56:48 -0400 Original-Received: from conversion-daemon.a-mtaout22.012.net.il by a-mtaout22.012.net.il (HyperSendmail v2007.08) id <0N6Q00E00LY18R00@a-mtaout22.012.net.il> for 17713@debbugs.gnu.org; Fri, 06 Jun 2014 10:56:41 +0300 (IDT) Original-Received: from HOME-C4E4A596F7 ([87.69.4.28]) by a-mtaout22.012.net.il (HyperSendmail v2007.08) with ESMTPA id <0N6Q00E22M2G8N10@a-mtaout22.012.net.il>; Fri, 06 Jun 2014 10:56:40 +0300 (IDT) In-reply-to: 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: 140.186.70.43 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:90111 Archived-At: > From: David Kastrup > Date: Fri, 06 Jun 2014 09:33:59 +0200 > > Geoff Shannon writes: > > > So I've got a hung emacs that I have attached to in a debugger. I opened a > > new emacs to use report-emacs-bug; following the instructions I was going > > to include the output of 'bt full'. Except that it's about 17500 lines > > long... > > > > I took a look at the backtrace as well, and of the 3800 calls on the > > list, ~3700 of them are from either mark_object or mark_vectorlike. > > There will be likely a lot of repetition here as this sounds like an > infinite recursion. I see no signs of infinite recursion in the backtrace, only some quite deep recursion. I've seen GC go as deep as 30K recursive calls to mark_object, so that is quite normal, certainly not unheard of. > Just the end and the start of the traceback (enough to recognize the > pattern in the middle) should be enough. The traceback will likely > be because of stack overflow. If it's infinite recursion that hits stack overflow, Emacs will crash due to SIGSEGV, I think. Which I understand was not the case here.