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: Thu, 23 Nov 2017 19:09:28 -0500 Message-ID: <87h8tkzgef.fsf@users.sourceforge.net> References: <87y3nga0lv.fsf@killashandra.ballybran.fr> <87po8s8k02.fsf@ericabrahamsen.net> <87zi7udorn.fsf@killashandra.ballybran.fr> <8760aim2a5.fsf@ericabrahamsen.net> <87375j2tzd.fsf@users.sourceforge.net> <87inecwl1v.fsf@killashandra.ballybran.fr> <87y3n81eq7.fsf@users.sourceforge.net> <87h8ts1cfp.fsf@users.sourceforge.net> <87zi7kyzcf.fsf@ericabrahamsen.net> <87efov1zzn.fsf@users.sourceforge.net> <87h8trzc6e.fsf@ericabrahamsen.net> <87bmjz0xez.fsf@users.sourceforge.net> <87zi7cpooo.fsf@killashandra.ballybran.fr> 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 1511482219 18752 195.159.176.226 (24 Nov 2017 00:10:19 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Fri, 24 Nov 2017 00:10:19 +0000 (UTC) User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/26.0.90 (gnu/linux) Cc: Eric Abrahamsen , 29220@debbugs.gnu.org, Stefan Monnier To: pierre.techoueyres@free.fr (Pierre =?UTF-8?Q?T=C3=A9choueyres?=) Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Fri Nov 24 01:10:12 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 1eI1ZK-0004KU-Sq for geb-bug-gnu-emacs@m.gmane.org; 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Thu, 23 Nov 2017 16:09:30 -0800 (PST) Original-Received: from zebian ([45.2.119.34]) by smtp.googlemail.com with ESMTPSA id g79sm3869575itb.29.2017.11.23.16.09.29 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Thu, 23 Nov 2017 16:09:29 -0800 (PST) In-Reply-To: <87zi7cpooo.fsf@killashandra.ballybran.fr> ("Pierre \=\?utf-8\?Q\?T\=C3\=A9choueyres\=22's\?\= message of "Fri, 24 Nov 2017 00:20:39 +0100") 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:140285 Archived-At: pierre.techoueyres@free.fr (Pierre T=C3=A9choueyres) writes: >> 25.3: >> (eieio--object-class-tag bob) =3D> eieio-class-tag--person >> 26: >> (eieio--object-class-tag bob) =3D> #2=3D#s(eieio--class person nil nil >> [#s(cl-slot-descriptor name unbound string nil)] #s(hash-table size 65 >> test eq rehash-size 1.5 rehash-threshold 0.8125 data (name 0)) nil >> ((:name . name)) #1=3D[] #1# #s(#2# unbound) (:custom-groups nil)) >> >> In Emacs 25 we have a simple symbol which will round-trip as an `eq' >> object, in Emacs 26 we have a structure which will not (and furthermore >> has some circularity, requiring print-circle to print readably). >> > > I've tried to dive into print.c but I don't understand how you return > from print_object, when you're on an hash-table to obtain the vector > with an eieio-class-tag-- (as in 25.3) ? > > Can anyone tell me how this work in 25.3 ? Nothing has changed in print.c in this respect. In 25.3, objects are vectors, and class tags are symbols. In 26, objects are records and class tags are eieio--class records. As a result, they print differently.