From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED!not-for-mail From: Noam Postavsky Newsgroups: gmane.emacs.bugs Subject: bug#29220: 26.0.90; eieio-persistent-read fail to restore saved object. Date: Sun, 12 Nov 2017 14:10:46 -0500 Message-ID: <87375j2tzd.fsf@users.sourceforge.net> References: <87y3nga0lv.fsf@killashandra.ballybran.fr> <87po8s8k02.fsf@ericabrahamsen.net> <87zi7udorn.fsf@killashandra.ballybran.fr> <8760aim2a5.fsf@ericabrahamsen.net> NNTP-Posting-Host: blaine.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable X-Trace: blaine.gmane.org 1510513874 23093 195.159.176.226 (12 Nov 2017 19:11:14 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Sun, 12 Nov 2017 19:11:14 +0000 (UTC) User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/26.0.90 (gnu/linux) Cc: 29220@debbugs.gnu.org, Stefan Monnier , pierre.techoueyres@free.fr To: Eric Abrahamsen Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Sun Nov 12 20:11:08 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 1eDxes-0005cn-Uq for geb-bug-gnu-emacs@m.gmane.org; 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Sun, 12 Nov 2017 11:10:48 -0800 (PST) Original-Received: from zebian ([45.2.119.34]) by smtp.googlemail.com with ESMTPSA id e205sm3227744ita.6.2017.11.12.11.10.47 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Sun, 12 Nov 2017 11:10:47 -0800 (PST) In-Reply-To: <8760aim2a5.fsf@ericabrahamsen.net> (Eric Abrahamsen's message of "Fri, 10 Nov 2017 10:12:02 -0800") 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:139812 Archived-At: Eric Abrahamsen writes: > pierre.techoueyres@free.fr (Pierre T=C3=A9choueyres) writes: > >> So here is the same sample completed. Sorry. >> >> ;;; -*- lexical-binding: t -*- >> (require 'eieio) >> (require 'eieio-base) >> >> (defclass eieio-fail (eieio-persistent eieio-named) >> ((version :initarg :version :initform nil) >> (version-constant :allocation :class) >> (entries :initarg :entries :initform (make-hash-table)))) > > This problem isn't related to my changes: it looks like the source of > the issue is the way the hash table is written, and the fact that one of > its entries holds an EIEIO object. > > As far as I can tell, when the hash table is written with `prin1', the > EIEIO object inside is also getting written with `prin1' instead of > `object-write'. The `prin1' representation isn't readable, so the > persistent read process chokes on it. > > The prin1 process for the hash table would have to detect that there's > an object in there, and write it with `object-write'. > > I assume this used to work? There have been several changes to the > printing process in Emacs 26, but I don't have a good grasp of the > details -- hopefully Stefan or someone will chime in. Stefan isn't subscribed to the bug list, so you have to Cc him (which I've now done). I note that adding (setq print-circle t) makes the given recipe work.