From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Alan Third Newsgroups: gmane.emacs.bugs Subject: bug#23875: 25.0.95; Emacs crashes when closing a frame on OSX Date: Thu, 30 Jun 2016 19:50:43 +0100 Message-ID: References: <481371E5-6A60-49C8-B707-33B5001747BA@polito.it> NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain X-Trace: ger.gmane.org 1467312690 31622 80.91.229.3 (30 Jun 2016 18:51:30 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Thu, 30 Jun 2016 18:51:30 +0000 (UTC) Cc: 23875@debbugs.gnu.org To: Ivan Cibrario Bertolotti Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Thu Jun 30 20:51:20 2016 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 1bIh3R-0008Hw-CY for geb-bug-gnu-emacs@m.gmane.org; Thu, 30 Jun 2016 20:51:13 +0200 Original-Received: from localhost ([::1]:52115 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bIh3Q-0005rM-IK for geb-bug-gnu-emacs@m.gmane.org; Thu, 30 Jun 2016 14:51:12 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:50284) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bIh3J-0005pt-S7 for bug-gnu-emacs@gnu.org; Thu, 30 Jun 2016 14:51:06 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1bIh3G-0004pk-NG for bug-gnu-emacs@gnu.org; Thu, 30 Jun 2016 14:51:05 -0400 Original-Received: from debbugs.gnu.org ([208.118.235.43]:48716) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bIh3G-0004pf-J0 for bug-gnu-emacs@gnu.org; Thu, 30 Jun 2016 14:51:02 -0400 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1bIh3G-0007Nx-B9 for bug-gnu-emacs@gnu.org; Thu, 30 Jun 2016 14:51:02 -0400 X-Loop: help-debbugs@gnu.org Resent-From: Alan Third Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Thu, 30 Jun 2016 18:51:02 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 23875 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: Original-Received: via spool by 23875-submit@debbugs.gnu.org id=B23875.146731265328373 (code B ref 23875); Thu, 30 Jun 2016 18:51:02 +0000 Original-Received: (at 23875) by debbugs.gnu.org; 30 Jun 2016 18:50:53 +0000 Original-Received: from localhost ([127.0.0.1]:32820 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1bIh37-0007NZ-6h for submit@debbugs.gnu.org; Thu, 30 Jun 2016 14:50:53 -0400 Original-Received: from mail-wm0-f41.google.com ([74.125.82.41]:36667) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1bIh35-0007NN-SK for 23875@debbugs.gnu.org; Thu, 30 Jun 2016 14:50:52 -0400 Original-Received: by mail-wm0-f41.google.com with SMTP id f126so233493026wma.1 for <23875@debbugs.gnu.org>; Thu, 30 Jun 2016 11:50:51 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=googlemail.com; s=20120113; h=sender:from:to:cc:subject:references:date:in-reply-to:message-id :user-agent:mime-version; bh=SGvD6QDfKbhorior3DEOy8LJkaB0BNKQMDdPLPqm0Mk=; b=v9+NX0WHC3BcJbz7hqj0j6OgQtWDqkhJ3Suqgn+BFluQ+DGYubsF9RfLiirDe/IKuX Eeq/pup1YAcTr6RVagjnFeECRqL3xQOhArtNJWXJA+VGPjHNrvu1t/iF9lmdaTtbCKZn VZGQlawb9MOCLb936Ko4sINv8h8KZ+uciRGDDD1A69H+YLS80G7532YJSCwkpdLS3Ixd 1qLTQUn03x4Ja7u/NslofYxMps7+9rCw3Cxvy1BCEpmj20U1aT3m60qs1WM8kB4hZQuw mFPaamwKy2kq/byL7VIkNNwGRUoqvkR15yRXV9d5RKC4dW23Kg4LgQ/qI2aHMMsbNjC3 jL5g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:sender:from:to:cc:subject:references:date :in-reply-to:message-id:user-agent:mime-version; bh=SGvD6QDfKbhorior3DEOy8LJkaB0BNKQMDdPLPqm0Mk=; b=XKVkPi/347tuuoeOqhQE6l3ylqozHbn/dhrILIx8GGr5KcZY4rSZKDQMDja7cF7+ft TScxrcmzk+x2596cdn/mnwQKSyVp+bJ3UeLP7rtVfiNGdjp5f+MDk2XbfIsaksuL107+ fy9XT4Dxr+PGohNoSyT8gPx4lc+4eKi/f6/7SPfL228+OweDweUNM/LH9haNucNaO1Oi lkynqHictsNlNhkgXwc2dVdV7qTtWdalXpnNVQz3H+iYIIhYIv1Ho8fOF1ApCImzwRkc Lwm3ORNi/A0NnxJWvg+zM95vtuQGY3O8hNZW/6Ti79MmhQ3mCZm6bX1ppHtWHf2cLCO0 rpEg== X-Gm-Message-State: ALyK8tKJ5eBVExe4DwSLpSuM65UoYBqr/un+Reexw1XuTfVDYtzV9IF8rJktApmfCiLiag== X-Received: by 10.28.7.20 with SMTP id 20mr16933067wmh.52.1467312645936; Thu, 30 Jun 2016 11:50:45 -0700 (PDT) Original-Received: from breton.holly.idiocy.org (ip6-2001-08b0-03f8-8129-ac92-b5d8-4ccd-40fc.holly.idiocy.org. [2001:8b0:3f8:8129:ac92:b5d8:4ccd:40fc]) by smtp.gmail.com with ESMTPSA id kc8sm4891071wjb.0.2016.06.30.11.50.44 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Thu, 30 Jun 2016 11:50:44 -0700 (PDT) In-Reply-To: <481371E5-6A60-49C8-B707-33B5001747BA@polito.it> (Ivan Cibrario Bertolotti's message of "Thu, 30 Jun 2016 19:06:04 +0200") User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/25.1.50 (darwin) 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:120236 Archived-At: Ivan Cibrario Bertolotti writes: > Emacs occasionally crashes with a segmentation fault when deleting a > frame on OSX. The crash occurs with low probability, I am sorry I > cannot provide a detailed recipe to reproduce it at the moment. Can you provide any information about what you're doing when it crashes? Are you just closing a frame with C-x 5 0? > Looking at the crash report (at the bottom of this email) it seems to me > that an EmacsImage is being deallocated by autorelease after it has > already been freed, thus causing a NULL pointer dereference. > > Might this be another case of omitted bracketing with > block_input()/unblock_input(), like in bug #23462? It could be, but I don't think so. That one happened when the event handler fired *within* the iconify function. I don't see anything in the stack trace that looks like that. > I am now running Emacs with NSTRACE_ENABLED. If you have any better > idea on how to gather more information, please let me know. I am > willing to help. I'm not sure how to go about debugging this stuff, but NSZombiesEnabled seems to be the way: $ NSZombiesEnabled=YES /path/to/emacs.app/Contents/MacOS/Emacs this should print out a message when an object is deallocated too many times, instead of just crashing. -- Alan Third