From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Tom Gillespie Newsgroups: gmane.emacs.bugs Subject: bug#55645: src/print.c; print_object changes make it impossible to compare elisp code across versions Date: Thu, 26 May 2022 08:56:19 -0700 Message-ID: References: <87zgj4biw7.fsf@gnus.org> Mime-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="10423"; mail-complaints-to="usenet@ciao.gmane.io" Cc: 55645@debbugs.gnu.org To: Lars Ingebrigtsen Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Thu May 26 17:57:21 2022 Return-path: Envelope-to: geb-bug-gnu-emacs@m.gmane-mx.org Original-Received: from lists.gnu.org ([209.51.188.17]) by ciao.gmane.io with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1nuFrU-0002Wl-F1 for geb-bug-gnu-emacs@m.gmane-mx.org; Thu, 26 May 2022 17:57:20 +0200 Original-Received: from localhost ([::1]:56802 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1nuFrT-0004MD-4g for geb-bug-gnu-emacs@m.gmane-mx.org; 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Thu, 26 May 2022 15:57:02 +0000 Original-Received: (at 55645) by debbugs.gnu.org; 26 May 2022 15:56:46 +0000 Original-Received: from localhost ([127.0.0.1]:59831 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1nuFqu-0002LD-RR for submit@debbugs.gnu.org; Thu, 26 May 2022 11:56:45 -0400 Original-Received: from mail-yw1-f178.google.com ([209.85.128.178]:46443) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1nuFqm-0002Ko-4p for 55645@debbugs.gnu.org; Thu, 26 May 2022 11:56:43 -0400 Original-Received: by mail-yw1-f178.google.com with SMTP id 00721157ae682-300beab2b76so19741507b3.13 for <55645@debbugs.gnu.org>; Thu, 26 May 2022 08:56:36 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=VqT9L1+Zwtr7k409FTViAInRLIQJ3YcrzD/4NxObUdY=; b=n8yExMxKbU34EFbFm19RicXKlFK9r7RFgsI2/PBy2+S9jz4Qy9m29lQgLgFzVyGcIp SEtrUS8NlJgk/d0/+pJDHYGV+ZMftWWftputAI0EuS8dDR0UzfLxIIrJNcL9VLnXUcS9 BEw67160JWvKx6IB1FCB5fxIVB+nGv/mR2TxsJBUdnlAo08QfkFmWp7s1n33uvOxphx4 RHoAlvWFZEHgBZ2f5BVBTc2MP4riIS9vh9ZeGSX1d7NJjvfdHbKJxpC6a84DIDHf2D62 +T4zJJioPfqrKT16R/FeFRvKeKkcChFrz2zBPDH3YrK1ZbKmOWPDUNbs0/+ADLdR9rHU aiUQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=VqT9L1+Zwtr7k409FTViAInRLIQJ3YcrzD/4NxObUdY=; b=c15A+fNgKHiJa1d0AYdKa0QrZu8IXhbHO8sM1L72GQx5SerwIXitBEy/9aLz2I4eef M5sd+kdp3H0jF4rIVS4at5xEtQzmNydT0AfewfL71VVdtwjkrCpuPqPTvbfH2hsZFt2p PPALpqhYEOwDAc40gvMcJZx1EpHD1FXWNl2jvc7e0TorGOyUp1514VnOaQjTyKvINhTF 5pe2Uke2Sn6Phk3bqtJQQ8l/jkdYuVP2T/GNPgoWvzsn+/SECSSc156mfz3rfY5oKp8p bDdXzec+H0j63jUsdKGzysgn5U5zV0DJ2Q/9LyeBrE+7+9k7GigDMtkuQtZUc8Ov6UYX GKEw== X-Gm-Message-State: AOAM5315QTmdS+BThMPo5TimxmU/ox8+5/MUeVGx2KfenQsAOH9+cpPc zqrYmLhQR6wA+LkGlUfcyz+ssp+GrHVfO9Qw/Pk= X-Google-Smtp-Source: ABdhPJwzms9NB2JXIzcjklaxdybqC8loJejv85+syBHNylfowJuTBZZof1/cNo7PouafyYHgS302xyKc5Y0DK7u9gZk= X-Received: by 2002:a81:ed4:0:b0:2f1:c8db:ce23 with SMTP id 203-20020a810ed4000000b002f1c8dbce23mr38123306ywo.95.1653580590387; Thu, 26 May 2022 08:56:30 -0700 (PDT) In-Reply-To: <87zgj4biw7.fsf@gnus.org> X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list 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-mx.org@gnu.org Original-Sender: "bug-gnu-emacs" Xref: news.gmane.io gmane.emacs.bugs:233121 Archived-At: > prin1 has never guaranteed that the printed representation would be > stable across versions, so if it's worked for you, that's by accident. It may not be meant to be stable but this behavior is unchanged since at least emacs-23, and given that xemacs has the same behavior, I'm guessing that this behavior has been stable for nearly 30 years. If prin1 is not stable, is there a print that is expected to be stable? > It would be possible to add something to control this details (via the > new OVERRIDES parameter), but it doesn't feel like it'd be worth it, > because, well, the representation isn't meant to be stable. Whether it is meant to be stable or not it has been stable for at least 30 years. If there is no print variant that does have stability guarantees then I think we do need a dynamic variable that would have the old behavior when it was nil, like those listed in Variables Affecting Output https://www.gnu.org/software/emacs/manual/html_node/elisp/Output-Variables.html