From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED!not-for-mail From: Michael Heerdegen Newsgroups: gmane.emacs.bugs Subject: bug#26624: 26.0.50; Generalized variable `buffer-local-value' does't restore local flag Date: Wed, 24 Jan 2018 15:33:38 +0100 Message-ID: <87mv13mim5.fsf@web.de> References: <87zid6udys.fsf@drachen> NNTP-Posting-Host: blaine.gmane.org Mime-Version: 1.0 Content-Type: text/plain X-Trace: blaine.gmane.org 1516804354 11137 195.159.176.226 (24 Jan 2018 14:32:34 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Wed, 24 Jan 2018 14:32:34 +0000 (UTC) User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/27.0.50 (gnu/linux) Cc: 26624@debbugs.gnu.org To: Philipp Stephani Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Wed Jan 24 15:32:29 2018 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 1eeM63-0001mZ-NY for geb-bug-gnu-emacs@m.gmane.org; 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Wed, 24 Jan 2018 15:33:39 +0100 In-Reply-To: (Philipp Stephani's message of "Sun, 02 Jul 2017 16:53:33 +0000") X-Provags-ID: V03:K0:VBa9A8ArFg+dkY38xhCtJu/meBAdh/nleNdmoyxNpzmgFduPrMh BdhcgC/o/N65cCNSIEDwaXmkGj38BfRznZZusEezfrf4EZHgHF8YZ4Mya7SctkrDT+r5mT4 MfIyiI8SUdBBFg4AOwtFW9YwZvRA5Mb8tlECIOp4QM1mfuvL4saEf/rbna4zZ7Nua2jYDum 7SvE4cm7zzmgcGxP43RHw== X-UI-Out-Filterresults: notjunk:1;V01:K0:4RgCl8slgks=:fQP3s3qLBYP0lku+LFGyl8 cllXCawxUimySn98xQMbUXOYf1RoYOsfjKaryY48KqxpIDEU7nLiIU2FJqGfUDSHuZ93oRs7a rh/vlmYlaaRUTlbBG+XXZTxTkSVr0hWCnEsAeZKoKUXfBPyEkhzsZufZeoK9PCaAFu1aOm6HD /IRNknLy8cbj2kJQVms90bOLInIfc331s2degqE9kzL40XutyBGoy1SwBbZ55/RLfvQt7EwRj 4/P6D57IUaItnV3SAZyFYBCGxRwaBpn8dUSyNlIJwbImSGQcKMvCTuCXbhWeaeMaapeZD5QEX Em0zmiVtvYz/aQyD4nKAak05JakLzu2rBg24YFe8Z/yYE2AXUeZv1gSmwqtaXV/vg55q74UEb ryuZT1nNSqnOmZSHK8EXQogv9lNS5Ppvae22QvIiAUx7awpXCQReYTUek8SdXht72H89+zM8z ykQGDrOeuDXz7cSQz02hA/59/c8v1vDwNuAM+sofTozlaCeHCrvyhWflMSwinGpCxYmCHsWtt h2TVFUen/Rjm8T6k94/E4g4830smc9L9sYBKaNxNIJIiTPhiySbpilFJfU/kYvf7WFcKw14I8 QFziz+Njg202mjYE8X4CtWETIh+3JWtTT4SxcYCPCws4fHhyvp4i9IBA8B5yWD+bsXp/w81gJ bV5xQ1s0QOsK4UzdudJadAY/zUw6lXYOZm6mXsHZSpCE6BqmJQarh9QdWw91GxP+dJySIJsk2 EYYmjIqx7kvU7XmKwMhaypAnqoeREN9+H/v9iad7xz11xunfcFjCE5BH2QBrAQqJ8vxCYvfU 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:142467 Archived-At: Philipp Stephani writes: > Thanks for this great analysis. Given this, it seems that the place > definition for `buffer-local-value' should be removed from gv.el. But hmm - surely there are other functions where `cl-letf' doesn't exactly restore the previous state - `alist-get', for example: #+begin_src emacs-lisp (setq my-alist '((x . 1))) (ignore (cl-letf (((alist-get 'y my-alist) 17)) my-alist)) my-alist ==> ((y) (x . 1)) #+end_src (admittedly, this is not as serious as the `buffer-local-value' case). Also, as another, different problematic case, the manual warns about `point' to be used with `cl-letf'. So, I wonder if, instead of removing the gv-setter definition for `buffer-local-value', we should instead add some more text about how `cl-letf' can have surprising effects to the manual. Michael.