From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: ar0x2ff@gmail.com Newsgroups: gmane.emacs.bugs Subject: bug#62889: 29.0.60; (setopt ...) does not give "assignment to free variable" warning Date: Tue, 18 Apr 2023 10:34:27 +0200 Message-ID: <1849432.tdWV9SEqCh@192.168.1.69> References: <2678912.mvXUDI8C0e@192.168.1.69> <87pm813e7k.fsf@posteo.net> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7Bit Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="16950"; mail-complaints-to="usenet@ciao.gmane.io" Cc: 62889@debbugs.gnu.org To: Philip Kaludercic Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Tue Apr 18 16:16:11 2023 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 1pom7u-0004Ep-Du for geb-bug-gnu-emacs@m.gmane-mx.org; 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Tue, 18 Apr 2023 01:34:29 -0700 (PDT) Original-Received: from 192.168.1.69 ([2001:b07:5d37:533e:346f:15eb:66d2:c3d7]) by smtp.gmail.com with ESMTPSA id a7-20020aa7d747000000b00504a7deefd6sm6861023eds.7.2023.04.18.01.34.28 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 18 Apr 2023 01:34:28 -0700 (PDT) In-Reply-To: <87pm813e7k.fsf@posteo.net> X-Mailman-Approved-At: Tue, 18 Apr 2023 10:15:38 -0400 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-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Xref: news.gmane.io gmane.emacs.bugs:260224 Archived-At: Philip Kaludercic writes: > var2 should also not be highlighted, since the first argument to the > function `customize-set-variable' is a symbol, and the byte compiler > correctly states that it doesn't know that any variable "var2" will be > defined. > > If you macroexpand setopt, you will see that it generates > > (setopt--set 'var3 2) > > which is all fine, since no functions are being invoked with undefined > variables. > > The reason this makes sense is that not all user options have to be > loaded when they are set. A number of them are even auto-loaded and > will load the library for the necessary user-option setters if > necessary. I was aware of the "do not overwrite custom variable if set before library load" mechanism, but I also seem to remember the (customize-set-variable ...) function to throw "free variable" warnings (e.g. when i open custome.el), so i kind of took for granted that it was correct behaviour. Glad to know (setopt ...) works this way! No more warning suppress in my init file :)