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#21903: date->string duff ISO 8601 negative years Date: Fri, 13 Nov 2015 14:01:57 +0000 Message-ID: <20151113140157.GN13455@fysh.org> NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Trace: ger.gmane.org 1447423431 16536 80.91.229.3 (13 Nov 2015 14:03:51 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Fri, 13 Nov 2015 14:03:51 +0000 (UTC) To: 21903@debbugs.gnu.org Original-X-From: bug-guile-bounces+guile-bugs=m.gmane.org@gnu.org Fri Nov 13 15:03:42 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 1ZxEwg-00026D-H3 for guile-bugs@m.gmane.org; Fri, 13 Nov 2015 15:03:18 +0100 Original-Received: from localhost ([::1]:53138 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ZxEwa-0004ZB-PT for guile-bugs@m.gmane.org; Fri, 13 Nov 2015 09:03:12 -0500 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:51631) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ZxEwW-0004XH-Hi for bug-guile@gnu.org; Fri, 13 Nov 2015 09:03:09 -0500 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1ZxEwR-00059J-5l for bug-guile@gnu.org; Fri, 13 Nov 2015 09:03:08 -0500 Original-Received: from debbugs.gnu.org ([208.118.235.43]:47063) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ZxEwR-00059A-1x for bug-guile@gnu.org; Fri, 13 Nov 2015 09:03:03 -0500 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.80) (envelope-from ) id 1ZxEwQ-0001vk-Mz for bug-guile@gnu.org; Fri, 13 Nov 2015 09:03:02 -0500 X-Loop: help-debbugs@gnu.org Resent-From: Zefram Original-Sender: "Debbugs-submit" Resent-CC: bug-guile@gnu.org Resent-Date: Fri, 13 Nov 2015 14:03:02 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: report 21903 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.14474233387362 (code B ref -1); Fri, 13 Nov 2015 14:03:02 +0000 Original-Received: (at submit) by debbugs.gnu.org; 13 Nov 2015 14:02:18 +0000 Original-Received: from localhost ([127.0.0.1]:36771 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.80) (envelope-from ) id 1ZxEvi-0001ug-Eq for submit@debbugs.gnu.org; Fri, 13 Nov 2015 09:02:18 -0500 Original-Received: from eggs.gnu.org ([208.118.235.92]:41395) by debbugs.gnu.org with esmtp (Exim 4.80) (envelope-from ) id 1ZxEvg-0001uY-BR for submit@debbugs.gnu.org; Fri, 13 Nov 2015 09:02:17 -0500 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1ZxEva-00051X-NH for submit@debbugs.gnu.org; Fri, 13 Nov 2015 09:02:16 -0500 Original-Received: from lists.gnu.org ([2001:4830:134:3::11]:58664) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ZxEva-00051T-K9 for submit@debbugs.gnu.org; Fri, 13 Nov 2015 09:02:10 -0500 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:51381) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ZxEvW-0004Ja-S3 for bug-guile@gnu.org; Fri, 13 Nov 2015 09:02:10 -0500 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1ZxEvS-00050N-3g for bug-guile@gnu.org; Fri, 13 Nov 2015 09:02:06 -0500 Original-Received: from river6.fysh.org ([2001:41d0:d:20da::2]:37094 helo=river.fysh.org) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ZxEvR-00050F-TX for bug-guile@gnu.org; Fri, 13 Nov 2015 09:02:02 -0500 Original-Received: from zefram by river.fysh.org with local (Exim 4.80 #2 (Debian)) id 1ZxEvN-0000ar-U6; Fri, 13 Nov 2015 14:01:57 +0000 Content-Disposition: inline X-detected-operating-system: by eggs.gnu.org: Error: Malformed IPv6 address (bad octet value). 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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:7898 Archived-At: The date->string function from (srfi srfi-19), used on ISO 8601 formats "~1", "~4" and "~5", for years preceding AD 1, has an off-by-one error: scheme@(guile-user)> (use-modules (srfi srfi-19)) scheme@(guile-user)> (date->string (julian-day->date 0 0) "~4") $1 = "-4714-11-24T12:00:00Z" The date in question, the JD epoch, is 24 November 4714 BC (in the proleptic Gregorian calendar). In ISO 8601 format, that year is properly represented as "-4713", not "-4714", because ISO 8601 uses the AD era exclusively. 4714 BC = AD -4713. -zefram