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#30626: 26.0.91; Crash when traversing a `stream-of-directory-files' Date: Fri, 02 Mar 2018 17:43:27 +0200 Message-ID: <837equwkio.fsf@gnu.org> References: <87inaiss6l.fsf@web.de> <6FCF6ACA-4F29-4B6B-BE9D-D7130C6E9495@gnu.org> <87fu5moe4c.fsf@web.de> <877eqyocro.fsf@web.de> <83zi3uz4nb.fsf@gnu.org> <87lgfd52by.fsf@gmail.com> <87bmg91ity.fsf@web.de> <83h8q1yuin.fsf@gnu.org> <87po4pnl0a.fsf@web.de> <837eqxyqoe.fsf@gnu.org> <87lgfdnf86.fsf@web.de> <87muzs11hk.fsf@web.de> <87606e4lel.fsf@gmail.com> <87o9k6ms8m.fsf@web.de> Reply-To: Eli Zaretskii NNTP-Posting-Host: blaine.gmane.org X-Trace: blaine.gmane.org 1520005331 14626 195.159.176.226 (2 Mar 2018 15:42:11 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Fri, 2 Mar 2018 15:42:11 +0000 (UTC) Cc: nicolas@petton.fr, npostavs@gmail.com, 30626@debbugs.gnu.org To: Michael Heerdegen Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Fri Mar 02 16:42:07 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 1ermou-00031k-7f for geb-bug-gnu-emacs@m.gmane.org; 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Fri, 02 Mar 2018 10:44:02 -0500 X-Loop: help-debbugs@gnu.org Resent-From: Eli Zaretskii Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Fri, 02 Mar 2018 15:44:02 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 30626 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: Original-Received: via spool by 30626-submit@debbugs.gnu.org id=B30626.152000540414773 (code B ref 30626); Fri, 02 Mar 2018 15:44:02 +0000 Original-Received: (at 30626) by debbugs.gnu.org; 2 Mar 2018 15:43:24 +0000 Original-Received: from localhost ([127.0.0.1]:41435 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1ermqC-0003qD-Hy for submit@debbugs.gnu.org; Fri, 02 Mar 2018 10:43:24 -0500 Original-Received: from eggs.gnu.org ([208.118.235.92]:42103) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1ermqA-0003pz-NB for 30626@debbugs.gnu.org; Fri, 02 Mar 2018 10:43:23 -0500 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1ermq2-0005CB-I2 for 30626@debbugs.gnu.org; Fri, 02 Mar 2018 10:43:17 -0500 Original-Received: from fencepost.gnu.org ([2001:4830:134:3::e]:59173) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ermq2-0005C7-Eh; Fri, 02 Mar 2018 10:43:14 -0500 Original-Received: from [176.228.60.248] (port=3460 helo=home-c4e4a596f7) by fencepost.gnu.org with esmtpsa (TLS1.2:RSA_AES_256_CBC_SHA1:256) (Exim 4.82) (envelope-from ) id 1ermq1-0007GF-Qo; Fri, 02 Mar 2018 10:43:14 -0500 In-reply-to: <87o9k6ms8m.fsf@web.de> (message from Michael Heerdegen on Fri, 02 Mar 2018 16:06:49 +0100) 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:143843 Archived-At: > From: Michael Heerdegen > Date: Fri, 02 Mar 2018 16:06:49 +0100 > Cc: Nicolas Petton , 30626@debbugs.gnu.org > > > (let* ((stream0 (stream-range 1 1000000)) > > (stream stream0)) > > (while (not (stream-empty-p stream)) > > (cl-callf stream-rest stream))) > > I guess you should have some awe if you write something like > (stream-range 1 1000000) and keep in mind what happens with this > gigantic thing. Though, could the object `stream0' references not > already be garbage-collected when the loop has been entered, since there > is no lexical reference to that variable there? It's still referenced by the let* form, I think. But even if it didn't, you cannot rely on it being GC'ed, because Emacs triggers GC at times which are hard or even impossible to predict.