From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mp0 ([2001:41d0:2:4a6f::]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)) by ms0.migadu.com with LMTPS id 2EoLCc8exGHhHAAAgWs5BA (envelope-from ) for ; Thu, 23 Dec 2021 08:01:35 +0100 Received: from aspmx1.migadu.com ([2001:41d0:2:4a6f::]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)) by mp0 with LMTPS id MOi6BM8exGE9TQAA1q6Kng (envelope-from ) for ; Thu, 23 Dec 2021 07:01:35 +0000 Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by aspmx1.migadu.com (Postfix) with ESMTPS id B69B92F6DA for ; Thu, 23 Dec 2021 08:01:34 +0100 (CET) Received: from localhost ([::1]:56312 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1n0I6X-0002vY-PU for larch@yhetil.org; Thu, 23 Dec 2021 02:01:33 -0500 Received: from eggs.gnu.org ([209.51.188.92]:55688) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1n0I62-0002vO-En for bug-guix@gnu.org; Thu, 23 Dec 2021 02:01:03 -0500 Received: from debbugs.gnu.org ([209.51.188.43]:48740) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1n0I62-0001YE-4G for bug-guix@gnu.org; Thu, 23 Dec 2021 02:01:02 -0500 Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1n0I62-0007IM-31 for bug-guix@gnu.org; Thu, 23 Dec 2021 02:01:02 -0500 X-Loop: help-debbugs@gnu.org Subject: bug#52749: G-expressions don't consistently preserve #nil Resent-From: Maxime Devos Original-Sender: "Debbugs-submit" Resent-CC: bug-guix@gnu.org Resent-Date: Thu, 23 Dec 2021 07:01:02 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 52749 X-GNU-PR-Package: guix X-GNU-PR-Keywords: To: Philip McGrath , 52749@debbugs.gnu.org Received: via spool by 52749-submit@debbugs.gnu.org id=B52749.164024280327895 (code B ref 52749); Thu, 23 Dec 2021 07:01:02 +0000 Received: (at 52749) by debbugs.gnu.org; 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spf=pass (aspmx1.migadu.com: domain of "bug-guix-bounces+larch=yhetil.org@gnu.org" designates 209.51.188.17 as permitted sender) smtp.mailfrom="bug-guix-bounces+larch=yhetil.org@gnu.org" X-Migadu-Spam-Score: -2.64 Authentication-Results: aspmx1.migadu.com; dkim=fail ("headers rsa verify failed") header.d=telenet.be header.s=r21 header.b=Lf62nW3+; dmarc=fail reason="SPF not aligned (relaxed)" header.from=telenet.be (policy=none); spf=pass (aspmx1.migadu.com: domain of "bug-guix-bounces+larch=yhetil.org@gnu.org" designates 209.51.188.17 as permitted sender) smtp.mailfrom="bug-guix-bounces+larch=yhetil.org@gnu.org" X-Migadu-Queue-Id: B69B92F6DA X-Spam-Score: -2.64 X-Migadu-Scanner: scn0.migadu.com X-TUID: lM/XfJukRRwe Hi, Philip McGrath schreef op wo 22-12-2021 om 23:25 [-0500]: > G-expressions currently do not consistently preserve the distinction > between #nil and '(), which causes trouble for programs that rely on > that distinction. In particular, the issue affects programs that use > (guix build json), because that library uses #nil to represent the JSON > value `null', whereas it uses '() to represent an empty JSON array. The constant #nil is only for elisp compatibility and not something supposed to be used in Scheme code that isn't for Scheme/elisp compatibility, so this seems more a bug in (guix build json) to me. Greetings, Maxime.