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#33034: `unwind-protect' cleanup form is not executed if body dies in stack overflow Date: Sat, 13 Oct 2018 13:29:13 +0300 Message-ID: <83k1mmuoli.fsf@gnu.org> References: NNTP-Posting-Host: blaine.gmane.org X-Trace: blaine.gmane.org 1539426487 22355 195.159.176.226 (13 Oct 2018 10:28:07 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Sat, 13 Oct 2018 10:28:07 +0000 (UTC) Cc: 33034@debbugs.gnu.org To: Paul Pogonyshev Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Sat Oct 13 12:28:03 2018 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 1gBH9P-0005gw-31 for geb-bug-gnu-emacs@m.gmane.org; Sat, 13 Oct 2018 12:28:03 +0200 Original-Received: from localhost ([::1]:44430 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1gBHBV-0000Lx-BR for geb-bug-gnu-emacs@m.gmane.org; Sat, 13 Oct 2018 06:30:13 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:34795) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1gBHBP-0000KH-Mq for bug-gnu-emacs@gnu.org; Sat, 13 Oct 2018 06:30:08 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1gBHBL-0002OJ-E6 for bug-gnu-emacs@gnu.org; Sat, 13 Oct 2018 06:30:07 -0400 Original-Received: from debbugs.gnu.org ([208.118.235.43]:43508) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1gBHBL-0002OF-AF for bug-gnu-emacs@gnu.org; Sat, 13 Oct 2018 06:30:03 -0400 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1gBHBL-0001TR-0a for bug-gnu-emacs@gnu.org; Sat, 13 Oct 2018 06:30:03 -0400 X-Loop: help-debbugs@gnu.org Resent-From: Eli Zaretskii Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Sat, 13 Oct 2018 10:30:02 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 33034 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: Original-Received: via spool by 33034-submit@debbugs.gnu.org id=B33034.15394265625590 (code B ref 33034); Sat, 13 Oct 2018 10:30:02 +0000 Original-Received: (at 33034) by debbugs.gnu.org; 13 Oct 2018 10:29:22 +0000 Original-Received: from localhost ([127.0.0.1]:47766 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1gBHAf-0001S5-BR for submit@debbugs.gnu.org; Sat, 13 Oct 2018 06:29:21 -0400 Original-Received: from eggs.gnu.org ([208.118.235.92]:53270) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1gBHAc-0001Rr-HP for 33034@debbugs.gnu.org; Sat, 13 Oct 2018 06:29:19 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1gBHAS-00021L-VV for 33034@debbugs.gnu.org; Sat, 13 Oct 2018 06:29:13 -0400 Original-Received: from fencepost.gnu.org ([2001:4830:134:3::e]:56442) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1gBHAS-00021H-Rc; Sat, 13 Oct 2018 06:29:08 -0400 Original-Received: from [176.228.60.248] (port=4054 helo=home-c4e4a596f7) by fencepost.gnu.org with esmtpsa (TLS1.2:RSA_AES_256_CBC_SHA1:256) (Exim 4.82) (envelope-from ) id 1gBHAS-0003lp-FS; Sat, 13 Oct 2018 06:29:08 -0400 In-reply-to: (message from Paul Pogonyshev on Sat, 13 Oct 2018 12:07:48 +0200) 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:151207 Archived-At: > From: Paul Pogonyshev > Date: Sat, 13 Oct 2018 12:07:48 +0200 > > To reproduce: > > (defun overflow () > (overflow)) > (defun test () > (interactive) > (message "BEFORE") > (unwind-protect > (overflow) > (message "CLEANUP"))) > > Invocation of `test' never issues message "CLEANUP", whether it is run > interactively or non-interactively. You are not supposed to continue using Emacs as usual after it recovered from a C stack overflow. You are supposed to exit Emacs and restart the session. The C stack overflow recovery is provided to allow you to save your edits instead of losing them. P.S. I was somehow certain that we say the above somewhere in the docs, but I cannot find it, so maybe I was dreaming. Patches to add that are welcome.