From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED!not-for-mail From: Eli Zaretskii Newsgroups: gmane.emacs.bugs Subject: bug#30846: 26.0.91; debug-watch of kill-all-local-variables triggers 'assertion failed: found == !EQ (blv->defcell, blv->valcell)' Date: Sun, 18 Mar 2018 16:05:37 +0200 Message-ID: <838tappjgu.fsf@gnu.org> References: <87sh8xttpq.fsf@gmail.com> Reply-To: Eli Zaretskii NNTP-Posting-Host: blaine.gmane.org X-Trace: blaine.gmane.org 1521381854 19792 195.159.176.226 (18 Mar 2018 14:04:14 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Sun, 18 Mar 2018 14:04:14 +0000 (UTC) Cc: 30846@debbugs.gnu.org To: Noam Postavsky Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Sun Mar 18 15:04:09 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 1exYuq-000505-7f for geb-bug-gnu-emacs@m.gmane.org; Sun, 18 Mar 2018 15:04:04 +0100 Original-Received: from localhost ([::1]:38016 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1exYwt-00055z-Ez for geb-bug-gnu-emacs@m.gmane.org; Sun, 18 Mar 2018 10:06:11 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:45277) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1exYwn-00055b-7F for bug-gnu-emacs@gnu.org; Sun, 18 Mar 2018 10:06:06 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1exYwk-00024A-3N for bug-gnu-emacs@gnu.org; Sun, 18 Mar 2018 10:06:05 -0400 Original-Received: from debbugs.gnu.org ([208.118.235.43]:60581) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1exYwk-00023n-06 for bug-gnu-emacs@gnu.org; Sun, 18 Mar 2018 10:06:02 -0400 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1exYwj-0006EI-MZ for bug-gnu-emacs@gnu.org; Sun, 18 Mar 2018 10:06:01 -0400 X-Loop: help-debbugs@gnu.org Resent-From: Eli Zaretskii Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Sun, 18 Mar 2018 14:06:01 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 30846 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: Original-Received: via spool by 30846-submit@debbugs.gnu.org id=B30846.152138194223916 (code B ref 30846); Sun, 18 Mar 2018 14:06:01 +0000 Original-Received: (at 30846) by debbugs.gnu.org; 18 Mar 2018 14:05:42 +0000 Original-Received: from localhost ([127.0.0.1]:40245 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1exYwP-0006Dg-R7 for submit@debbugs.gnu.org; Sun, 18 Mar 2018 10:05:41 -0400 Original-Received: from eggs.gnu.org ([208.118.235.92]:54031) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1exYwO-0006DS-DO for 30846@debbugs.gnu.org; Sun, 18 Mar 2018 10:05:40 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1exYwF-0001O4-T3 for 30846@debbugs.gnu.org; Sun, 18 Mar 2018 10:05:35 -0400 Original-Received: from fencepost.gnu.org ([2001:4830:134:3::e]:37359) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1exYwF-0001O0-Ok; Sun, 18 Mar 2018 10:05:31 -0400 Original-Received: from [176.228.60.248] (port=4970 helo=home-c4e4a596f7) by fencepost.gnu.org with esmtpsa (TLS1.2:RSA_AES_256_CBC_SHA1:256) (Exim 4.82) (envelope-from ) id 1exYwF-0000hX-8z; Sun, 18 Mar 2018 10:05:31 -0400 In-reply-to: <87sh8xttpq.fsf@gmail.com> (message from Noam Postavsky on Sun, 18 Mar 2018 09:10:41 -0400) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] 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:144382 Archived-At: > From: Noam Postavsky > Date: Sun, 18 Mar 2018 09:10:41 -0400 > > Evaluate the following from 'emacs -Q': > > (setq-local foo 1) > > ;; Simulate (debug-watch 'foo) + continue from *Backtrace* > (add-variable-watcher 'foo (lambda (symbol newval operation where) > (with-temp-buffer > (kill-all-local-variables)))) > (fundamental-mode) > > This results in > > ../../src/data.c:98: Emacs fatal error: assertion failed: found == !EQ (blv->defcell, blv->valcell) > > Backtrace attached. I guess it has something to do with the recursive > `kill-all-local-variables' call, although I'm not familiar enough with > the local variable machinery to say more about it. Do you mean that the inner call to kill-all-local-variables steps on toes of the outer call, and thus corrupts the local values or something? If so, do you see any signs of such a corruption?