From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED!not-for-mail From: Stephen Berman Newsgroups: gmane.emacs.bugs Subject: bug#24415: 24.4; issue with big file variable Date: Mon, 12 Sep 2016 10:45:46 +0200 Message-ID: <87k2eh1p6t.fsf@gmx.net> References: NNTP-Posting-Host: blaine.gmane.org Mime-Version: 1.0 Content-Type: text/plain X-Trace: blaine.gmane.org 1473669993 24970 195.159.176.226 (12 Sep 2016 08:46:33 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Mon, 12 Sep 2016 08:46:33 +0000 (UTC) User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/25.1.50 (gnu/linux) Cc: 24415@debbugs.gnu.org To: Andrea Rossetti Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Mon Sep 12 10:46:21 2016 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 1bjMsV-0004Gy-IB for geb-bug-gnu-emacs@m.gmane.org; Mon, 12 Sep 2016 10:46:11 +0200 Original-Received: from localhost ([::1]:41092 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bjMsW-0004a0-Jn for geb-bug-gnu-emacs@m.gmane.org; Mon, 12 Sep 2016 04:46:12 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:35290) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bjMsR-0004Zi-7Z for bug-gnu-emacs@gnu.org; Mon, 12 Sep 2016 04:46:08 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1bjMsM-0005Bt-7t for bug-gnu-emacs@gnu.org; Mon, 12 Sep 2016 04:46:07 -0400 Original-Received: from debbugs.gnu.org ([208.118.235.43]:59288) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bjMsM-0005Bi-4Z for bug-gnu-emacs@gnu.org; Mon, 12 Sep 2016 04:46:02 -0400 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1bjMsM-00025B-05 for bug-gnu-emacs@gnu.org; Mon, 12 Sep 2016 04:46:02 -0400 X-Loop: help-debbugs@gnu.org Resent-From: Stephen Berman Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Mon, 12 Sep 2016 08:46:01 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 24415 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: Original-Received: via spool by 24415-submit@debbugs.gnu.org id=B24415.14736699567994 (code B ref 24415); Mon, 12 Sep 2016 08:46:01 +0000 Original-Received: (at 24415) by debbugs.gnu.org; 12 Sep 2016 08:45:56 +0000 Original-Received: from localhost ([127.0.0.1]:57000 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1bjMsG-00024r-EF for submit@debbugs.gnu.org; Mon, 12 Sep 2016 04:45:56 -0400 Original-Received: from mout.gmx.net ([212.227.17.20]:55671) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1bjMsE-00024d-ME for 24415@debbugs.gnu.org; Mon, 12 Sep 2016 04:45:55 -0400 Original-Received: from rosalinde ([89.245.119.102]) by mail.gmx.com (mrgmx102) with ESMTPSA (Nemesis) id 0MHal6-1bkSnf1noq-003Mfk; Mon, 12 Sep 2016 10:45:47 +0200 In-Reply-To: (Andrea Rossetti's message of "Sun, 11 Sep 2016 23:52:56 +0200") X-Provags-ID: V03:K0:65t+Xys+OiVUo63ejIOu+QP5iNTWhq63WGYoVQ+SbxlAAevo0h8 +n4BqJeuFcxTSrEdcv91XrpF+M1nCDDsW6kmcpnUHulXDegQUvdVi2t+Mgpa1lo2kw8kdOf wPwvErs2EQJHDMAxy0IspjJuBdFg66N5Oae2nVUt7WGMLl1eALuJAzAL65yKTarU7VCsvtN NtdbeCyy52oJKqkBNJ6RA== X-UI-Out-Filterresults: notjunk:1;V01:K0:DMgYvGor0AA=:ERxfIxx6yiZ0iO8jgx1H5A 7oZBrkyQhpxH6TwIzCo0L6XZF+DkF3TFNZBBLpw78HVzuacYJHSVegpvMY4kmjfoxAmFjIQSC mriDHV3M2QbRK+aXMxeChTdc5BH0XmXShBZ73OSmXTWtscqrLOOemzPobHXrwttZfBiNrcvf6 H1r7oBMmxuOCOeHl/Q/hHncsPiqsAZGrU9LMymd5e65cn7/IEEv8tq4Ut2gSaKN/CUND5raJA IGX63l/JfW5XxgEhYQX8g1G/9uUyCWb+3ewBU+9ZclU0Nm0JW/Mnq0juscccZyUSy2ABNeuz+ msoi265GJp/ul3R9Yri/PAvwx/moa56pG4Ik4hqYNUuf/HviJagD91+GeNHMnbQemA1vVWWzT kQpnnEr1O5cYQ1hrbFYGX3ZFptQXHxBfL7xYKLP1DclsoCKMDMqZY9FXkuu1LfB0X6j7FlIyb 51uaSaE5L/RI4h9dfZTCBw6gj524XkcfmzsIlFltnoNUu8SFiWZfomHMG4wNNyLPVf5WgZw2z vkY1ok669+AThzOnq03zVipg8Ogi5yrnEQoyKMhlCFGWfjHBuSSLrAOq3fHz+h7zZ5RJhy3Qe vt7C4Og/ChXX7vTKeEuhdYOlm7erdsGLUYu+E/VT5gi6tEnSev62sktMlpodkfDXnHBOgJ1zj Q+961mjlGByGnTLMA8Y/YSyRlFbyLcswCiJtAZDVcbN3M17M1vBdUZ8gMH/zU5upVkPzQfxKv D0/rq5+GaqySpO4X6/ttoqJCzLCaNKddpVikHSe9GjeeHCBRncVzjt0qbo6rBIZzPfmN2PHC 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:123207 Archived-At: On Sun, 11 Sep 2016 23:52:56 +0200 Andrea Rossetti wrote: > Hi guys, > > if a file variable is a list longer than a certain size, then it's > ignored on file loading. Test case follows: > > - start "emacs -Q" > - M-: (add-file-local-variable 'v1 (make-list 2000 1)) RET > - C-x C-w example01.el RET > - close Emacs and restart "emacs -Q" > - C-x C-f example01.el RET > - bad behaviour: at this point a confirm message to load the file > variable should have appeared ("... safe variables blah blah... do you > want to apply it? y/n/!") but it does not, and the variable is not > initialized > > Further observations: > > - if you replay this same test with a shorter v1, for example lowering > "2000" to "1000", then the behaviour will be fine: the confirm > message will appear and inspection of the variable will show correct > value. > > - it doesn't seem to depend on the max length of a single text line: > you get the error even when you re-run a similar test that saves two > file-local variables v1 and v2, each being "(make-list 1000 1)". > > Does the test reproduce in the same way on your workstation? Do you > think it's a bug, or am I just hitting some well-known hard limit? It's a hard limit in hack-local-variables: ;; Look for "Local variables:" line in last page. (save-excursion (goto-char (point-max)) (search-backward "\n\^L" (max (- (point-max) 3000) (point-min)) 'move) I don't know how well-known this is; AFAICT it's not documented. Steve Berman