From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Zefram Newsgroups: gmane.lisp.guile.bugs Subject: bug#22033: time-utc format is lossy Date: Fri, 27 Nov 2015 19:38:25 +0000 Message-ID: <20151127193825.GA28472@fysh.org> NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Trace: ger.gmane.org 1448653156 1491 80.91.229.3 (27 Nov 2015 19:39:16 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Fri, 27 Nov 2015 19:39:16 +0000 (UTC) To: 22033@debbugs.gnu.org Original-X-From: bug-guile-bounces+guile-bugs=m.gmane.org@gnu.org Fri Nov 27 20:39:05 2015 Return-path: Envelope-to: guile-bugs@m.gmane.org Original-Received: from lists.gnu.org ([208.118.235.17]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1a2OrH-0001jg-Vv for guile-bugs@m.gmane.org; Fri, 27 Nov 2015 20:39:04 +0100 Original-Received: from localhost ([::1]:58281 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1a2OrK-0007xw-KF for guile-bugs@m.gmane.org; Fri, 27 Nov 2015 14:39:06 -0500 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:47315) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1a2OrG-0007vV-UL for bug-guile@gnu.org; Fri, 27 Nov 2015 14:39:03 -0500 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1a2OrG-0001zX-59 for bug-guile@gnu.org; Fri, 27 Nov 2015 14:39:02 -0500 Original-Received: from debbugs.gnu.org ([208.118.235.43]:38523) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1a2OrG-0001zT-2E for bug-guile@gnu.org; Fri, 27 Nov 2015 14:39:02 -0500 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.80) (envelope-from ) id 1a2OrF-0002If-Ps for bug-guile@gnu.org; Fri, 27 Nov 2015 14:39:01 -0500 X-Loop: help-debbugs@gnu.org Resent-From: Zefram Original-Sender: "Debbugs-submit" Resent-CC: bug-guile@gnu.org Resent-Date: Fri, 27 Nov 2015 19:39:01 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: report 22033 X-GNU-PR-Package: guile X-GNU-PR-Keywords: X-Debbugs-Original-To: bug-guile@gnu.org Original-Received: via spool by submit@debbugs.gnu.org id=B.14486531368827 (code B ref -1); Fri, 27 Nov 2015 19:39:01 +0000 Original-Received: (at submit) by debbugs.gnu.org; 27 Nov 2015 19:38:56 +0000 Original-Received: from localhost ([127.0.0.1]:56464 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.80) (envelope-from ) id 1a2Or9-0002II-PP for submit@debbugs.gnu.org; Fri, 27 Nov 2015 14:38:56 -0500 Original-Received: from eggs.gnu.org ([208.118.235.92]:37216) by debbugs.gnu.org with esmtp (Exim 4.80) (envelope-from ) id 1a2Oqp-0002Hp-DQ for submit@debbugs.gnu.org; Fri, 27 Nov 2015 14:38:54 -0500 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1a2Oqo-0001vM-5X for submit@debbugs.gnu.org; Fri, 27 Nov 2015 14:38:35 -0500 Original-Received: from lists.gnu.org ([2001:4830:134:3::11]:49087) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1a2Oqo-0001vI-2f for submit@debbugs.gnu.org; Fri, 27 Nov 2015 14:38:34 -0500 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:47216) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1a2Oqn-0007HA-7M for bug-guile@gnu.org; Fri, 27 Nov 2015 14:38:34 -0500 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1a2Oqm-0001uz-CE for bug-guile@gnu.org; Fri, 27 Nov 2015 14:38:33 -0500 Original-Received: from river6.fysh.org ([2001:41d0:d:20da::2]:55654 helo=river.fysh.org) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1a2Oqm-0001qv-6g for bug-guile@gnu.org; Fri, 27 Nov 2015 14:38:32 -0500 Original-Received: from zefram by river.fysh.org with local (Exim 4.80 #2 (Debian)) id 1a2Oqf-0007pi-3h; Fri, 27 Nov 2015 19:38:25 +0000 Content-Disposition: inline X-detected-operating-system: by eggs.gnu.org: Error: Malformed IPv6 address (bad octet value). X-detected-operating-system: by eggs.gnu.org: Error: Malformed IPv6 address (bad octet value). X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.15 Precedence: list X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x X-Received-From: 208.118.235.43 X-BeenThere: bug-guile@gnu.org List-Id: "Bug reports for GUILE, GNU's Ubiquitous Extension Language" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: bug-guile-bounces+guile-bugs=m.gmane.org@gnu.org Original-Sender: bug-guile-bounces+guile-bugs=m.gmane.org@gnu.org Xref: news.gmane.org gmane.lisp.guile.bugs:7908 Archived-At: In SRFI-19, round-tripping some UTC dates through the time-utc structure format, for the couple of seconds around a leap second: scheme@(guile-user)> (use-modules (srfi srfi-19)) scheme@(guile-user)> (define (tdate d) (write (list (date->string d "~4") (date->string (time-utc->date (date->time-utc d) 0) "~4"))) (newline)) scheme@(guile-user)> (tdate (make-date 0 59 59 23 30 6 2012 0)) ("2012-06-30T23:59:59Z" "2012-06-30T23:59:59Z") scheme@(guile-user)> (tdate (make-date 0 60 59 23 30 6 2012 0)) ("2012-06-30T23:59:60Z" "2012-06-30T23:59:60Z") scheme@(guile-user)> (tdate (make-date 0 0 0 0 1 7 2012 0)) ("2012-07-01T00:00:00Z" "2012-06-30T23:59:60Z") scheme@(guile-user)> (tdate (make-date 0 1 0 0 1 7 2012 0)) ("2012-07-01T00:00:01Z" "2012-07-01T00:00:01Z") Observe that the second immediately following the leap second, the first second of the following UTC day, isn't round-tripped correctly. It comes back as the leap second. These two seconds are perfectly distinct parts of the UTC time scale, and the time-utc format ought to preserve their distinction. -zefram