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#28990: 27.0.50; thunk-delay: running expansion also requires lexical-binding Date: Wed, 25 Oct 2017 15:47:45 +0200 Message-ID: <87po9be3um.fsf@web.de> NNTP-Posting-Host: blaine.gmane.org Mime-Version: 1.0 Content-Type: text/plain X-Trace: blaine.gmane.org 1508939361 26741 195.159.176.226 (25 Oct 2017 13:49:21 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Wed, 25 Oct 2017 13:49:21 +0000 (UTC) Cc: Nicolas Petton To: 28990@debbugs.gnu.org Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Wed Oct 25 15:49:15 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 1e7M3U-0005ot-EN for geb-bug-gnu-emacs@m.gmane.org; Wed, 25 Oct 2017 15:49:12 +0200 Original-Received: from localhost ([::1]:48413 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1e7M3a-0000A3-8K for geb-bug-gnu-emacs@m.gmane.org; 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Try e.g. something trivial as #+begin_src emacs-lisp (defun my-thunk-test () (thunk-force (thunk-delay (+ 1 2)))) #+end_src This compiles ok, but executing (my-thunk-test) without lexbind enabled gives you a meaningless error like "void-variable: forced". I think we should document (in the file header) that lexical-binding mode is required when thunks are created with `thunk-delay'. I think we could additionally raise an error in the expansion of `thunk-delay' when lexical-binding -> nil. TIA, Michael. In GNU Emacs 27.0.50 (build 1, x86_64-pc-linux-gnu, GTK+ Version 3.22.24) of 2017-10-25 built on drachen Repository revision: cb73c70180f57f3fb99fae3aaefbacf0a61cea3f Windowing system distributor 'The X.Org Foundation', version 11.0.11905000 System Description: Debian GNU/Linux testing (buster)