From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Michael Heerdegen Newsgroups: gmane.emacs.help Subject: Re: Error does not throw to debugger in 'when' block Date: Thu, 12 Jan 2023 22:15:45 +0100 Message-ID: <87wn5re9oe.fsf@web.de> References: <83o7r4kvgs.fsf@gnu.org> <87mt6oyows.fsf@web.de> Mime-Version: 1.0 Content-Type: text/plain Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="15779"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Gnus/5.13 (Gnus v5.13) To: help-gnu-emacs@gnu.org Cancel-Lock: sha1:QgZ57rzzftAh86nsJ3BZx50KCfs= Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org Thu Jan 12 22:16:51 2023 Return-path: Envelope-to: geh-help-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 1pG4wN-0003qn-2i for geh-help-gnu-emacs@m.gmane-mx.org; Thu, 12 Jan 2023 22:16:51 +0100 Original-Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1pG4ve-0001lp-M5; Thu, 12 Jan 2023 16:16:07 -0500 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1pG4vU-0001lH-BE for help-gnu-emacs@gnu.org; Thu, 12 Jan 2023 16:15:56 -0500 Original-Received: from ciao.gmane.io ([116.202.254.214]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1pG4vS-0002oz-M8 for help-gnu-emacs@gnu.org; Thu, 12 Jan 2023 16:15:55 -0500 Original-Received: from list by ciao.gmane.io with local (Exim 4.92) (envelope-from ) id 1pG4vO-0002i5-95 for help-gnu-emacs@gnu.org; Thu, 12 Jan 2023 22:15:50 +0100 X-Injected-Via-Gmane: http://gmane.org/ Received-SPF: pass client-ip=116.202.254.214; envelope-from=geh-help-gnu-emacs@m.gmane-mx.org; helo=ciao.gmane.io X-Spam_score_int: -15 X-Spam_score: -1.6 X-Spam_bar: - X-Spam_report: (-1.6 / 5.0 requ) BAYES_00=-1.9, FREEMAIL_FORGED_FROMDOMAIN=0.067, FREEMAIL_FROM=0.001, HEADER_FROM_DIFFERENT_DOMAINS=0.249, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=no autolearn_force=no X-Spam_action: no action X-BeenThere: help-gnu-emacs@gnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Users list for the GNU Emacs text editor List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org Original-Sender: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org Xref: news.gmane.io gmane.emacs.help:142216 Archived-At: Arthur Miller writes: > Michael Heerdegen writes: > > Let's just do the part that matters: > > > For C-x C-e you need to eval a form that raises an error. Also that > > works as expected: evaluating the defun doesn't raise an error as > > expected. > > Yes of course. As Eli said details matters. > > I have now looked more into it, tested another example, and I do > understand now > what happeneds; I just didn't know it worked that way: > > When called interactively with M-x, (as the command) the evaluation of the > function exits on error, the error message is emittied, but the > evaluation is > not trapped in the debugger. When called from lisp, for example via: M-: it > ends up in the debugger. I was calling it interactively, and didn't realize > realized it worked this way. I wasn't aware that "commands" does not > trap in the > debugger on errors. Maybe I need to set some other of debug-on-* flags? Only debug-on-error. That's what I tested. I enabled that option and called your command in the original form and got a debugger. [ Note there is a pitfall: M-: debug-on-error RET prints t although the variable's value "is actually" nil - that's because M-: binds the variable to t temporarily when evaluating the specified expression. ] Michael.