From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: "Lennart Borgman (gmail)" Newsgroups: gmane.emacs.devel Subject: Re: bug#1082: 23.0.60; read-char unexpectedly halts execution of script Date: Mon, 06 Oct 2008 21:34:45 +0200 Message-ID: <48EA6855.8070800@gmail.com> References: <87hc7pr16r.fsf@cyd.mit.edu> NNTP-Posting-Host: lo.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit X-Trace: ger.gmane.org 1223321833 18323 80.91.229.12 (6 Oct 2008 19:37:13 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Mon, 6 Oct 2008 19:37:13 +0000 (UTC) Cc: emacs-devel@gnu.org To: Chong Yidong , 1082@emacsbugs.donarmstrong.com Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Mon Oct 06 21:38:11 2008 Return-path: Envelope-to: ged-emacs-devel@m.gmane.org Original-Received: from lists.gnu.org ([199.232.76.165]) by lo.gmane.org with esmtp (Exim 4.50) id 1Kmvtv-0001kK-Af for ged-emacs-devel@m.gmane.org; Mon, 06 Oct 2008 21:37:51 +0200 Original-Received: from localhost ([127.0.0.1]:45207 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1Kmvsr-0001sl-PC for ged-emacs-devel@m.gmane.org; Mon, 06 Oct 2008 15:36:45 -0400 Original-Received: from mailman by lists.gnu.org with tmda-scanned (Exim 4.43) id 1Kmvsn-0001sO-Ez for emacs-devel@gnu.org; Mon, 06 Oct 2008 15:36:41 -0400 Original-Received: from exim by lists.gnu.org with spam-scanned (Exim 4.43) id 1Kmvsj-0001rH-Qm for emacs-devel@gnu.org; Mon, 06 Oct 2008 15:36:40 -0400 Original-Received: from [199.232.76.173] (port=42801 helo=monty-python.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1Kmvsj-0001r9-KB for emacs-devel@gnu.org; Mon, 06 Oct 2008 15:36:37 -0400 Original-Received: from ch-smtp01.sth.basefarm.net ([80.76.149.212]:52533) by monty-python.gnu.org with esmtps (TLS-1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.60) (envelope-from ) id 1Kmvsj-0006q0-7u for emacs-devel@gnu.org; Mon, 06 Oct 2008 15:36:37 -0400 Original-Received: from c83-254-151-87.bredband.comhem.se ([83.254.151.87]:62603 helo=[127.0.0.1]) by ch-smtp01.sth.basefarm.net with esmtp (Exim 4.68) (envelope-from ) id 1KmvrU-00004z-4w; Mon, 06 Oct 2008 21:35:33 +0200 User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.1.9) Gecko/20071031 Thunderbird/2.0.0.9 Mnenhy/0.7.5.666 In-Reply-To: <87hc7pr16r.fsf@cyd.mit.edu> X-Enigmail-Version: 0.95.7 X-Antivirus: avast! (VPS 081006-0, 2008-10-06), Outbound message X-Antivirus-Status: Clean X-Originating-IP: 83.254.151.87 X-Scan-Result: No virus found in message 1KmvrU-00004z-4w. X-Scan-Signature: ch-smtp01.sth.basefarm.net 1KmvrU-00004z-4w 606dad796ea58413753467bb3b4ced1d X-detected-operating-system: by monty-python.gnu.org: GNU/Linux 2.6? (barebone, rare!) X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: "Emacs development discussions." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Original-Sender: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Errors-To: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.devel:104386 Archived-At: Chong Yidong wrote: >> Let filter.el consist of the forms: >> >> (defun bc-filter (proc string) >> (message "%s" string)) >> >> (message "starting") >> (setq bc (start-process "bc" nil "/usr/bin/bc")) >> (set-process-filter bc 'bc-filter) >> >> (while t >> (let ((char (read-char nil nil 0.1))) >> (message "char: %s" char))) >> >> Where "/usr/bin/bc" is the GNU arbitrary precision calculator. Now: >> >> mt-computer:~ mt$ emacs --script filter.el >> starting >> mt-computer:~ mt$ >> >> I expect non-termination in this case, as in eval-buffer on filter.el. > > This broke when SYNC_INPUT became the default; it works when Emacs is > recompiled without SYNC_INPUT, like Emacs 22. > > I don't know what the specific cause of failure is, however. Maybe the > SYNC_INPUT code should only be active when Emacs is run interactively. > > Thoughts? What is the while loop supposed to do? I tested just that and I got a bit weird results.