From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED!not-for-mail From: Andreas Schwab Newsgroups: gmane.emacs.devel Subject: Re: Conservative GC isn't safe Date: Mon, 28 Nov 2016 20:26:56 +0100 Message-ID: <874m2rqubj.fsf@linux-m68k.org> References: <66485157-00cd-4704-a421-cbfe84299cae@cs.ucla.edu> <69a1fdf3-7120-125b-8556-d74f5afc6b37@dancol.org> <8360na399k.fsf@gnu.org> <26a81224-c61e-27ac-37b4-5e7bd1e90910@dancol.org> NNTP-Posting-Host: blaine.gmane.org Mime-Version: 1.0 Content-Type: text/plain X-Trace: blaine.gmane.org 1480361237 32356 195.159.176.226 (28 Nov 2016 19:27:17 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Mon, 28 Nov 2016 19:27:17 +0000 (UTC) User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/25.1 (gnu/linux) Cc: Daniel Colascione , emacs-devel@gnu.org To: Stefan Monnier Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Mon Nov 28 20:27:13 2016 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 1cBRa5-0007iZ-BF for ged-emacs-devel@m.gmane.org; Mon, 28 Nov 2016 20:27:13 +0100 Original-Received: from localhost ([::1]:60725 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1cBRa9-0000fQ-2P for ged-emacs-devel@m.gmane.org; Mon, 28 Nov 2016 14:27:17 -0500 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:51894) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1cBRa0-0000ez-A8 for emacs-devel@gnu.org; Mon, 28 Nov 2016 14:27:09 -0500 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1cBRZx-0007z8-3B for emacs-devel@gnu.org; Mon, 28 Nov 2016 14:27:08 -0500 Original-Received: from mail-out.m-online.net ([212.18.0.9]:34108) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1cBRZw-0007y3-T9 for emacs-devel@gnu.org; Mon, 28 Nov 2016 14:27:05 -0500 Original-Received: from frontend01.mail.m-online.net (unknown [192.168.8.182]) by mail-out.m-online.net (Postfix) with ESMTP id 3tSGry36f3z3hjJt; Mon, 28 Nov 2016 20:26:58 +0100 (CET) Original-Received: from localhost (dynscan1.mnet-online.de [192.168.6.68]) by mail.m-online.net (Postfix) with ESMTP id 3tSGry0RmPzvlTF; Mon, 28 Nov 2016 20:26:58 +0100 (CET) X-Virus-Scanned: amavisd-new at mnet-online.de Original-Received: from mail.mnet-online.de ([192.168.8.182]) by localhost (dynscan1.mail.m-online.net [192.168.6.68]) (amavisd-new, port 10024) with ESMTP id iWyLKILRc0v2; Mon, 28 Nov 2016 20:26:57 +0100 (CET) X-Auth-Info: W9mUMqNFouY90XaE3yyvwY0xD3klx8mGJiQQ1gGjW3Qk8AvtwXEBEt3MLMV7D1BP Original-Received: from igel.home (ppp-88-217-6-32.dynamic.mnet-online.de [88.217.6.32]) (using TLSv1 with cipher DHE-RSA-CAMELLIA256-SHA (256/256 bits)) (No client certificate requested) by mail.mnet-online.de (Postfix) with ESMTPSA; Mon, 28 Nov 2016 20:26:57 +0100 (CET) Original-Received: by igel.home (Postfix, from userid 1000) id C17ED2C261E; Mon, 28 Nov 2016 20:26:56 +0100 (CET) X-Yow: WHO sees a BEACH BUNNY sobbing on a SHAG RUG?! In-Reply-To: (Stefan Monnier's message of "Mon, 28 Nov 2016 13:03:13 -0500") X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x [fuzzy] X-Received-From: 212.18.0.9 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:209673 Archived-At: On Nov 28 2016, Stefan Monnier wrote: > For strings, the argument might not be as strong. Maybe code like > (ignore (propertize "foo" 'a 'b)) could lead to us working on an > unreachable string, so it could get GC'd while we manipulate its > intervals. The arguments to propertize will still be reachable from the bytecode stack. Andreas. -- Andreas Schwab, schwab@linux-m68k.org GPG Key fingerprint = 58CA 54C7 6D53 942B 1756 01D3 44D5 214B 8276 4ED5 "And now for something completely different."