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#29789: 25.1; Emacs blocks user input when using visual-fill-column in wide terminals Date: Wed, 20 Dec 2017 22:29:27 +0200 Message-ID: <83bmitnnx4.fsf@gnu.org> References: Reply-To: Eli Zaretskii NNTP-Posting-Host: blaine.gmane.org X-Trace: blaine.gmane.org 1513801704 21829 195.159.176.226 (20 Dec 2017 20:28:24 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Wed, 20 Dec 2017 20:28:24 +0000 (UTC) Cc: 29789@debbugs.gnu.org To: Luis Gerhorst Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Wed Dec 20 21:28:20 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 1eRkyK-0004iz-P4 for geb-bug-gnu-emacs@m.gmane.org; Wed, 20 Dec 2017 21:28:12 +0100 Original-Received: from localhost ([::1]:39971 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eRl0H-0004XV-D7 for geb-bug-gnu-emacs@m.gmane.org; Wed, 20 Dec 2017 15:30:13 -0500 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:46188) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eRl0B-0004XL-De for bug-gnu-emacs@gnu.org; Wed, 20 Dec 2017 15:30:08 -0500 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1eRl07-0005nm-Cv for bug-gnu-emacs@gnu.org; Wed, 20 Dec 2017 15:30:07 -0500 Original-Received: from debbugs.gnu.org ([208.118.235.43]:36143) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1eRl07-0005ne-8a for bug-gnu-emacs@gnu.org; Wed, 20 Dec 2017 15:30:03 -0500 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1eRl06-0006IG-RA for bug-gnu-emacs@gnu.org; Wed, 20 Dec 2017 15:30:02 -0500 X-Loop: help-debbugs@gnu.org Resent-From: Eli Zaretskii Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Wed, 20 Dec 2017 20:30:02 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 29789 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: Original-Received: via spool by 29789-submit@debbugs.gnu.org id=B29789.151380176524109 (code B ref 29789); Wed, 20 Dec 2017 20:30:02 +0000 Original-Received: (at 29789) by debbugs.gnu.org; 20 Dec 2017 20:29:25 +0000 Original-Received: from localhost ([127.0.0.1]:44824 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1eRkzV-0006Gm-1w for submit@debbugs.gnu.org; Wed, 20 Dec 2017 15:29:25 -0500 Original-Received: from eggs.gnu.org ([208.118.235.92]:54830) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1eRkzS-0006Ga-Ty for 29789@debbugs.gnu.org; Wed, 20 Dec 2017 15:29:23 -0500 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1eRkzJ-0005N0-FK for 29789@debbugs.gnu.org; Wed, 20 Dec 2017 15:29:17 -0500 Original-Received: from fencepost.gnu.org ([2001:4830:134:3::e]:40721) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eRkzJ-0005Mu-Bw; Wed, 20 Dec 2017 15:29:13 -0500 Original-Received: from [176.228.60.248] (port=3708 helo=home-c4e4a596f7) by fencepost.gnu.org with esmtpsa (TLS1.2:RSA_AES_256_CBC_SHA1:256) (Exim 4.82) (envelope-from ) id 1eRkzI-0008UM-OL; Wed, 20 Dec 2017 15:29:13 -0500 In-reply-to: (message from Luis Gerhorst on Wed, 20 Dec 2017 20:28:27 +0100) 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:141312 Archived-At: > From: Luis Gerhorst > Date: Wed, 20 Dec 2017 20:28:27 +0100 > > > 1. Run Emacs in a wide terminal (about 150 characters, 100 isn't > enough): emacs -nw -Q > > 2. Load a arbitrary theme: M-x load-theme adwaita > > 3. Load visual-fill-column. E.g. by copying > https://raw.githubusercontent.com/joostkremers/visual-fill-column/c0e5ec8f88a7598f7afdee565978410bee0de2a0/visual-fill-column.el > into the scratch buffer and typing M-x eval-buffer. > > There is nothing suspicious about the code, regular lisp code should not > be able to block Emacs (I believe). It does not seem to contain any loops that block the main thread. The maintainer knows about the issue but say's it may be an issue with low-level code. In GUI Emacs it works. > > 4. Open a buffer and enable visual-fill-column-mode: M-x > visual-fill-column-mode > > 5. Your Emacs is now blocked. I tried to reproduce this on GNU/Linux and on MS-Windows, but failed both times, both with Emacs 25.1 and the current emacs-26 release branch. What I see is that after enabling the mode, Emacs becomes somewhat sluggish in cursor motion (hardly surprising, given what the mode does), but it certainly doesn't hang. I wonder what's different on your system, or on that of those who confirmed the problem.