Received: (at 57195) by debbugs.gnu.org; 15 Aug 2022 07:18:48 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Mon Aug 15 03:18:48 2022 Received: from localhost ([127.0.0.1]:40549 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1oNUN6-0007uA-51 for submit <at> debbugs.gnu.org; Mon, 15 Aug 2022 03:18:48 -0400 Received: from quimby.gnus.org ([95.216.78.240]:56212) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <larsi@HIDDEN>) id 1oNUN4-0007tx-8Y for 57195 <at> debbugs.gnu.org; Mon, 15 Aug 2022 03:18:46 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=gnus.org; s=20200322; h=Content-Type:MIME-Version:Message-ID:Date:References: In-Reply-To:Subject:Cc:To:From:Sender:Reply-To:Content-Transfer-Encoding: Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender: Resent-To:Resent-Cc:Resent-Message-ID:List-Id:List-Help:List-Unsubscribe: List-Subscribe:List-Post:List-Owner:List-Archive; bh=fUM+Bs/+SOAZnIpuIKU2LhFpcPRosYqtAorQYchicaA=; b=hdmzHHdFQuY2gi00dqnLXqMoWE 5b75y22BvI/4A0Z3Zz+plWp3FGnSssILeAV7IpZWGHEhf7AT/kDEq29P/vxDFC2mdIWY/54a5km4e WUFyTcuXWYv5RPt4U81sUljlVFygZZHymY5phMtFy5v5t4ZdzFXb+faO+ZXNSmRR8Zes=; Received: from [84.212.220.105] (helo=joga) by quimby.gnus.org with esmtpsa (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from <larsi@HIDDEN>) id 1oNUMw-0004qX-5z; Mon, 15 Aug 2022 09:18:40 +0200 From: Lars Ingebrigtsen <larsi@HIDDEN> To: Ihor Radchenko <yantar92@HIDDEN> Subject: Re: bug#57195: 28.1.90; Can error backtrace be preserved upon intercepting with `condition-case'? In-Reply-To: <87edxj1o3z.fsf@localhost> (Ihor Radchenko's message of "Sun, 14 Aug 2022 11:49:04 +0800") References: <87edxj1o3z.fsf@localhost> X-Now-Playing: Aksak Maboul's _Un Peu De L'Ame Des Bandits_: "Cinema" Date: Mon, 15 Aug 2022 09:18:37 +0200 Message-ID: <87bksmasaa.fsf@HIDDEN> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/29.0.50 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain X-Spam-Report: Spam detection software, running on the system "quimby.gnus.org", has NOT identified this incoming email as spam. The original message has been attached to this so you can view it or label similar future email. If you have any questions, see @@CONTACT_ADDRESS@@ for details. Content preview: Ihor Radchenko <yantar92@HIDDEN> writes: > Is it possible to display the original backtrace in the intercepted > condition-case? I don't think that's possible, so that's why condition-case-unless-debug exists. Content analysis details: (-2.9 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -1.0 ALL_TRUSTED Passed through trusted hosts only via SMTP -1.9 BAYES_00 BODY: Bayes spam probability is 0 to 1% [score: 0.0000] X-Spam-Score: -2.3 (--) X-Debbugs-Envelope-To: 57195 Cc: 57195 <at> debbugs.gnu.org X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: -3.3 (---) Ihor Radchenko <yantar92@HIDDEN> writes: > Is it possible to display the original backtrace in the intercepted > condition-case? I don't think that's possible, so that's why condition-case-unless-debug exists.
bug-gnu-emacs@HIDDEN:bug#57195; Package emacs.
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From: Ihor Radchenko <yantar92@HIDDEN>
To: bug-gnu-emacs@HIDDEN
Subject: 28.1.90; Can error backtrace be preserved upon intercepting with
`condition-case'?
Date: Sun, 14 Aug 2022 11:49:04 +0800
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Consider the following functions:
(defun my/err ()
(let ((x 0))
(/ 2 x)))
(defun my/interc ()
(condition-case err
(my/err)
(arith-error
(backtrace-revert)
(error "`my/err' signalled an error. Check out Troubleshooting section of the manual. (%S)" err))))
`my/interc' function calls `my/err', but wants to provide a more useful
error message. This can obviously be done using `condition-case'.
However, when one tries to run M-: (my/interc), the following backtrace
will appear:
Debugger entered--Lisp error: (error "My custom error: (arith-error)")
(error "My custom error: %S" (arith-error))
(condition-case err (my/err) (arith-error (error "My custom error: %S" err)))
(my/interc)
(eval-expression (my/interc) nil nil 127)
(funcall-interactively eval-expression (my/interc) nil nil 127)
(command-execute eval-expression)
This backtrace is limiting the information up to the `condition-case'
form itself. The deeper levels are not available.
Compare it with the result of M-: (my/err)
Debugger entered--Lisp error: (arith-error)
(/ 2 0)
(let ((x 0)) (/ 2 x))
(my/err)
(eval-expression (my/err) nil nil 127)
(funcall-interactively eval-expression (my/err) nil nil 127)
(command-execute eval-expression)
This backtrace is much more detailed and gives the exact place where the
error happens.
Unfortunately, the second case does not allow to make the error message
more helpful.
Is it possible to display the original backtrace in the intercepted
condition-case?
--
Ihor Radchenko,
Org mode contributor,
Learn more about Org mode at https://orgmode.org/.
Support Org development at https://liberapay.com/org-mode,
or support my work at https://liberapay.com/yantar92
Ihor Radchenko <yantar92@HIDDEN>:bug-gnu-emacs@HIDDEN.
Full text available.bug-gnu-emacs@HIDDEN:bug#57195; Package emacs.
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