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#25883: 25.2; Frequent, but not reproducible, crash on startup Date: Sun, 26 Feb 2017 21:34:03 +0200 Message-ID: <831sukrbkk.fsf@gnu.org> References: Reply-To: Eli Zaretskii NNTP-Posting-Host: blaine.gmane.org X-Trace: blaine.gmane.org 1488137742 789 195.159.176.226 (26 Feb 2017 19:35:42 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Sun, 26 Feb 2017 19:35:42 +0000 (UTC) Cc: 25883@debbugs.gnu.org To: John Wiegley Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Sun Feb 26 20:35:38 2017 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 1ci4bW-0007rp-RH for geb-bug-gnu-emacs@m.gmane.org; Sun, 26 Feb 2017 20:35:34 +0100 Original-Received: from localhost ([::1]:48042 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ci4bc-0001Gb-TK for geb-bug-gnu-emacs@m.gmane.org; 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Sun, 26 Feb 2017 14:34:28 -0500 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1ci4aO-0007Ib-Ib for bug-gnu-emacs@gnu.org; Sun, 26 Feb 2017 14:34:27 -0500 Original-Received: from fencepost.gnu.org ([2001:4830:134:3::e]:46150) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ci4aO-0007IX-Fr; Sun, 26 Feb 2017 14:34:24 -0500 Original-Received: from 84.94.185.246.cable.012.net.il ([84.94.185.246]:2211 helo=home-c4e4a596f7) by fencepost.gnu.org with esmtpsa (TLS1.2:RSA_AES_256_CBC_SHA1:256) (Exim 4.82) (envelope-from ) id 1ci4aN-0003Rz-PQ; Sun, 26 Feb 2017 14:34:24 -0500 In-reply-to: (message from John Wiegley on Sun, 26 Feb 2017 11:14:50 -0800) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.6.x 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:129838 Archived-At: > From: John Wiegley > Date: Sun, 26 Feb 2017 11:14:50 -0800 > > This only happens when I startup my "alternate" Emacs that I use exclusively > for ERC, and it only happens maybe once or twice a week (I startup that Emacs > once a day). But maybe this stack trace can help give some insight. > > If ever this becomes reliably reproducible, I'll comment further. But what > might be causing it to happen? Some serious messup in the display code. The backtrace basically says that the display engine became very confused regarding stuff that comes from buffer and from various display/overlay strings or images. I haven't seen aborts in bidi_pop_it since I don't remember how long. I am not familiar enough with ERC support in Emacs -- is it possible that Emacs tries to display some partial byte stream that includes incomplete characters, i.e. the byte sequence for some character(s) is incomplete?