From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Stefan Kangas Newsgroups: gmane.emacs.bugs Subject: bug#34214: 25.3; minibuffer function help in lisp modes changes match-data Date: Thu, 13 Aug 2020 07:30:35 -0700 Message-ID: References: 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="16481"; mail-complaints-to="usenet@ciao.gmane.io" Cc: 34214@debbugs.gnu.org To: "Miguel V. S. Frasson" Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Thu Aug 13 16:31:16 2020 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 1k6EGB-0004BR-Tv for geb-bug-gnu-emacs@m.gmane-mx.org; Thu, 13 Aug 2020 16:31:15 +0200 Original-Received: from localhost ([::1]:37170 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1k6EGA-0000H4-V2 for geb-bug-gnu-emacs@m.gmane-mx.org; Thu, 13 Aug 2020 10:31:14 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:51438) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1k6EFy-0000EA-BH for bug-gnu-emacs@gnu.org; Thu, 13 Aug 2020 10:31:02 -0400 Original-Received: from debbugs.gnu.org ([209.51.188.43]:39073) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1k6EFy-0002pE-0j for bug-gnu-emacs@gnu.org; Thu, 13 Aug 2020 10:31:02 -0400 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1k6EFx-0006sT-Tz for bug-gnu-emacs@gnu.org; Thu, 13 Aug 2020 10:31:01 -0400 X-Loop: help-debbugs@gnu.org Resent-From: Stefan Kangas Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Thu, 13 Aug 2020 14:31:01 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 34214 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: notabug Original-Received: via spool by 34214-submit@debbugs.gnu.org id=B34214.159732904426396 (code B ref 34214); Thu, 13 Aug 2020 14:31:01 +0000 Original-Received: (at 34214) by debbugs.gnu.org; 13 Aug 2020 14:30:44 +0000 Original-Received: from localhost ([127.0.0.1]:50614 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1k6EFg-0006rg-IR for submit@debbugs.gnu.org; Thu, 13 Aug 2020 10:30:44 -0400 Original-Received: from mail-yb1-f182.google.com ([209.85.219.182]:46279) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1k6EFd-0006rQ-HN for 34214@debbugs.gnu.org; Thu, 13 Aug 2020 10:30:43 -0400 Original-Received: by mail-yb1-f182.google.com with SMTP id x10so3384589ybj.13 for <34214@debbugs.gnu.org>; Thu, 13 Aug 2020 07:30:41 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:in-reply-to:references:mime-version:date :message-id:subject:to:cc; bh=ZxRZlnkPBUJnTnJz0KJlNFlJ5MQ3yWsqOLr9Yq9+Fkw=; b=QgBHLn++OfrubnM3FgCE+hpGR/owtbrcQq/1Q0YPWskvUTIaJG9rtjDJQ2unvoImIT CmGCeJxKkslzo2wNDXSmvZotQsma1xUDJrPPe7NLqwCUvRJTn62DZimZeAaQhbR8UX+8 /4VzJ6WugC5RKzucJSJxCDATvJi3H/Mm31RCCMMOv3I+16yC4hCDjKR5glyu5bFm+imU vGQiGvdTaXDjXpnjtiVEd5vhPPOkstnMUheXLP7Gp/R3UetitHoVmr2OZr+V7U15eU86 RSlKeVTOp2tIHGz3dgimZewIgohNSNqQY8xEXl5SiGPhFDJl6skXwQkSHFHyVR2NKZCQ vGUg== X-Gm-Message-State: AOAM532xrvoCg5+LZCphRIWiuvdMzahsIWjQ781qQMERC1fxmhDCF34B Zn1CwnhAkDTYSw9jC4bUYRfHHNDr0di8GyDFgdU= X-Google-Smtp-Source: ABdhPJygmihPpmk9TfmC38IgCPEbawwIBZnS0Tc+Bo0t6jslk+VEgu5uzPXAV2m2RfqsRAWaWBipPXPtqiYHx4+7xZM= X-Received: by 2002:a25:4609:: with SMTP id t9mr6683735yba.231.1597329035816; Thu, 13 Aug 2020 07:30:35 -0700 (PDT) Original-Received: from 753933720722 named unknown by gmailapi.google.com with HTTPREST; Thu, 13 Aug 2020 07:30:35 -0700 In-Reply-To: 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:185029 Archived-At: [Please use "Reply to all" so that your replies get recorded in the bug tracker.] "Miguel V. S. Frasson" writes: > Hi. > > The "documented" behavior is in Elisp Reference, but not in doc-strings of > functions that rely on match data. So they are not so easily spotted by > non-experienced users. > > This bug teached me a lesson, but it took me a lot of time to realize how > volatile match-data is, changed even by a helper mode like eldoc. > > IMO it is so easy to avoid interference into user experience in this case, > adding convenience, just by saving match data inside eldoc... > > Should a helper mode "confuse" non-experienced users because it could rely > on "documented" behavior? If so, why does Emacs have disabled commands, if > they are also documented? > > Best regards > > Miguel Actually, you may have a point regarding eldoc, if it's clobbering match data just by moving around the buffer. I guess it would be nice to avoid that. Let's see if anyone else has something to say here. Best regards, Stefan Kangas