GNU bug report logs - #38238
(call-with-input-string "( . 42)" read) => 42

Message received at submit <at> debbugs.gnu.org:

Received: (at submit) by debbugs.gnu.org; 16 Nov 2019 21:16:15 +0000
From debbugs-submit-bounces <at> debbugs.gnu.org Sat Nov 16 16:16:15 2019
Received: from localhost ([127.0.0.1]:39812 helo=debbugs.gnu.org)
	by debbugs.gnu.org with esmtp (Exim 4.84_2)
	(envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>)
	id 1iW5QV-0005yc-3q
	for submit <at> debbugs.gnu.org; Sat, 16 Nov 2019 16:16:15 -0500
Received: from lists.gnu.org ([209.51.188.17]:56169)
 by debbugs.gnu.org with esmtp (Exim 4.84_2)
 (envelope-from <wingo@HIDDEN>) id 1iW5QR-0005yS-B2
 for submit <at> debbugs.gnu.org; Sat, 16 Nov 2019 16:16:12 -0500
Received: from eggs.gnu.org ([2001:470:142:3::10]:57029)
 by lists.gnu.org with esmtp (Exim 4.90_1)
 (envelope-from <wingo@HIDDEN>) id 1iW5QP-0003su-DQ
 for bug-guile@HIDDEN; Sat, 16 Nov 2019 16:16:10 -0500
X-Spam-Checker-Version: SpamAssassin 3.3.2 (2011-06-06) on eggs.gnu.org
X-Spam-Level: 
X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00,URIBL_BLOCKED
 autolearn=disabled version=3.3.2
Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71)
 (envelope-from <wingo@HIDDEN>) id 1iW5QO-0004Us-Jg
 for bug-guile@HIDDEN; Sat, 16 Nov 2019 16:16:09 -0500
Received: from fanzine.igalia.com ([178.60.130.6]:45612)
 by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16)
 (Exim 4.71) (envelope-from <wingo@HIDDEN>) id 1iW5QO-0004UY-BW
 for bug-guile@HIDDEN; Sat, 16 Nov 2019 16:16:08 -0500
DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=igalia.com;
 s=20170329; 
 h=Content-Type:MIME-Version:Message-ID:Date:Subject:To:From;
 bh=FRAE+c1vt9lRVaAlNcS0YBkaGqxPDcL4RgDH7MQBt1I=; 
 b=LieL+5m9b7mQtceDAQ8wp7/xegHiHGSbJzMyyZoKbraX6+NS82e3F5kC14PBs331A7Gst3zymGqol6mYFNZ2HxINa0ZlYIqF16+RH+zpH9tbVwo9rcdN4AzHOw16wYeWx9qSVkAoajbdWpA7cVBKGlFhFdRG7XwuGVAfa+NY3UxBUfgCLcSJiRiE9o8X57IW6XHFP06syWFNZvu9/AbuPnv+VY0/XK8lUBvR5QNM6z/eUNsEmUf2X+sWEk+Ynsmk/QGqba3mwrE8sVrN5LHStOwg8pNpV4McEhL1lpGB7f5o0Ev4RFCsm9KUytIfXrTRZnh654zbDsf1EUx32PmXBQ==;
Received: from cha74-2-88-160-189-213.fbx.proxad.net ([88.160.189.213]
 helo=sparrow) by fanzine.igalia.com with esmtpsa 
 (Cipher TLS1.0:ECDHE_RSA_AES_256_CBC_SHA1:256) (Exim)
 id 1iW5QM-0008Va-Qj
 for <bug-guile@HIDDEN>; Sat, 16 Nov 2019 22:16:06 +0100
From: Andy Wingo <wingo@HIDDEN>
To: bug-guile@HIDDEN
Subject: (call-with-input-string "( . 42)" read) => 42
Date: Sat, 16 Nov 2019 22:15:43 +0100
Message-ID: <87h833msjk.fsf@HIDDEN>
User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/26.2 (gnu/linux)
MIME-Version: 1.0
Content-Type: text/plain
X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x (no
 timestamps) [generic] [fuzzy]
X-Received-From: 178.60.130.6
X-Spam-Score: -1.6 (-)
X-Debbugs-Envelope-To: submit
X-BeenThere: debbugs-submit <at> debbugs.gnu.org
X-Mailman-Version: 2.1.18
Precedence: list
List-Id: <debbugs-submit.debbugs.gnu.org>
List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, 
 <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe>
List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/>
List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org>
List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help>
List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, 
 <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe>
Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org
Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org>
X-Spam-Score: -2.6 (--)

Guile has a strange syntax extension, as described in the bug title.
It's not explicitly documented AFAIU and it seems it may simply be a
mistake.  We should consider making ( . 42) a lexical error.