From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED!not-for-mail From: Lars Brinkhoff Newsgroups: gmane.emacs.devel Subject: Re: Debugging problems using async.el Date: Fri, 07 Apr 2017 20:10:25 +0200 Organization: nocrew Message-ID: <86bms82ini.fsf@molnjunk.nocrew.org> References: <86pogo4vty.fsf@molnjunk.nocrew.org> <8360igof0k.fsf@gnu.org> <867f2w4qdk.fsf@molnjunk.nocrew.org> <83zifsmtp6.fsf@gnu.org> <86mvbs2voq.fsf_-_@molnjunk.nocrew.org> NNTP-Posting-Host: blaine.gmane.org Mime-Version: 1.0 Content-Type: text/plain X-Trace: blaine.gmane.org 1491588666 20540 195.159.176.226 (7 Apr 2017 18:11:06 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Fri, 7 Apr 2017 18:11:06 +0000 (UTC) User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/24.3 (gnu/linux) To: emacs-devel@gnu.org Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Fri Apr 07 20:11:01 2017 Return-path: Envelope-to: ged-emacs-devel@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 1cwYLX-0004Dx-Da for ged-emacs-devel@m.gmane.org; Fri, 07 Apr 2017 20:10:55 +0200 Original-Received: from localhost ([::1]:52122 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1cwYLd-0003zB-66 for ged-emacs-devel@m.gmane.org; Fri, 07 Apr 2017 14:11:01 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:40234) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1cwYLU-0003xc-R5 for emacs-devel@gnu.org; Fri, 07 Apr 2017 14:10:53 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1cwYLR-0005MJ-Mq for emacs-devel@gnu.org; Fri, 07 Apr 2017 14:10:52 -0400 Original-Received: from [195.159.176.226] (port=33458 helo=blaine.gmane.org) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1cwYLR-0005MA-FU for emacs-devel@gnu.org; Fri, 07 Apr 2017 14:10:49 -0400 Original-Received: from list by blaine.gmane.org with local (Exim 4.84_2) (envelope-from ) id 1cwYLE-0002Pj-9b for emacs-devel@gnu.org; Fri, 07 Apr 2017 20:10:36 +0200 X-Injected-Via-Gmane: http://gmane.org/ Original-Lines: 16 Original-X-Complaints-To: usenet@blaine.gmane.org Cancel-Lock: sha1:cMAAHtB/3v5oyLsi99HelX+mKi0= X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 195.159.176.226 X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: "Emacs development discussions." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Original-Sender: "Emacs-devel" Xref: news.gmane.org gmane.emacs.devel:213769 Archived-At: Kaushal Modi wrote: > Lars Brinkhoff wrote: > I see the subordinate logs stuff to *Messages*, which goes to > stdout in batch mode. I wonder if that output is saved somewhere. > > It might be useful to add an option to save *Messages* and *Backtrace* > stuff to files on disk. In async.el, we can see those vars to t and > enable the logging to files. It turns out this isn't necessary. If you make sure to turn on async-debug in the subordinate, messages and backtraces are logged in the parent *emacs* buffer. I only set async-debug in the parent, so I didn't get the full debug log. This was very helpful. I was able to make good progress towards finding the root cause. Not completely there yet though.