From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mp0 ([2001:41d0:8:6d80::]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)) by ms0.migadu.com with LMTPS id yAJOHsEUJWGb7wAAgWs5BA (envelope-from ) for ; Tue, 24 Aug 2021 17:48:17 +0200 Received: from aspmx1.migadu.com ([2001:41d0:8:6d80::]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)) by mp0 with LMTPS id qLP9GcEUJWE8KQAA1q6Kng (envelope-from ) for ; Tue, 24 Aug 2021 15:48:17 +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 A6DF391DC for ; Tue, 24 Aug 2021 17:48:16 +0200 (CEST) Received: from localhost ([::1]:56206 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1mIYes-0005R5-O9 for larch@yhetil.org; Tue, 24 Aug 2021 11:48:14 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:45358) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mIYeh-0005Ov-D4 for bug-guix@gnu.org; Tue, 24 Aug 2021 11:48:03 -0400 Received: from debbugs.gnu.org ([209.51.188.43]:33497) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1mIYeg-0003s5-TB for bug-guix@gnu.org; Tue, 24 Aug 2021 11:48:02 -0400 Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1mIYeg-0006tb-FJ for bug-guix@gnu.org; Tue, 24 Aug 2021 11:48:02 -0400 X-Loop: help-debbugs@gnu.org Subject: bug#34999: Record special field abstraction leakage Resent-From: Leo Prikler Original-Sender: "Debbugs-submit" Resent-CC: bug-guix@gnu.org Resent-Date: Tue, 24 Aug 2021 15:48:02 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 34999 X-GNU-PR-Package: guix X-GNU-PR-Keywords: To: Ludovic =?UTF-8?Q?Court=C3=A8s?= , 34999@debbugs.gnu.org Received: via spool by 34999-submit@debbugs.gnu.org id=B34999.162982006026467 (code B ref 34999); Tue, 24 Aug 2021 15:48:02 +0000 Received: (at 34999) by debbugs.gnu.org; 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boundary="=-5+XuvfSwQSjxnipieDpA" User-Agent: Evolution 3.34.2 MIME-Version: 1.0 X-TUG-Backscatter-control: bt4lQm5Tva3SBgCuw0EnZw X-Spam-Scanner: SpamAssassin 3.003001 X-Spam-Score-relay: -1.9 X-Scanned-By: MIMEDefang 2.74 on 129.27.10.116 X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list X-BeenThere: bug-guix@gnu.org List-Id: Bug reports for GNU Guix List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: bug-guix-bounces+larch=yhetil.org@gnu.org Sender: "bug-Guix" X-Migadu-Flow: FLOW_IN ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=yhetil.org; s=key1; t=1629820097; h=from:from:sender:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:mime-version:mime-version: content-type:content-type:resent-cc:resent-from:resent-sender: resent-message-id:in-reply-to:in-reply-to:references:references: list-id:list-help:list-unsubscribe:list-subscribe:list-post: dkim-signature; bh=PCeCbsMt8jXHvxMLAcICxckc6dbqmUGBSIaUNhB6tTo=; 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spf=pass (aspmx1.migadu.com: domain of bug-guix-bounces@gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=bug-guix-bounces@gnu.org X-Migadu-Spam-Score: -0.22 Authentication-Results: aspmx1.migadu.com; dkim=fail ("headers rsa verify failed") header.d=tugraz.at header.s=mailrelay header.b=TMvXpCix; dmarc=fail reason="SPF not aligned (relaxed)" header.from=student.tugraz.at (policy=none); spf=pass (aspmx1.migadu.com: domain of bug-guix-bounces@gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=bug-guix-bounces@gnu.org X-Migadu-Queue-Id: A6DF391DC X-Spam-Score: -0.22 X-Migadu-Scanner: scn0.migadu.com X-TUID: vacWl+Nskrve --=-5+XuvfSwQSjxnipieDpA Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 8bit Hi Ludo, I think I have found out why users see the thunked fields as below. Am Dienstag, den 26.03.2019, 10:38 +0100 schrieb Ludovic Courtès: > The changes I made in version-control.scm and gnucash.scm in commit > e6301fb76d0a8d931ece2e18d197e3c2cc53fc6c revealed an abstraction > leakage > I wasn’t aware of: there’s a pattern where users “see” that thunked > fields are thunked: > > (package > ;; … > (inputs …) > (arguments `(foo bar ,(inputs) …))) ;<- here ‘inputs’ is seen as > a thunk The issue is that for constructing the records, we let*-bind the field names to their values before calling the constructor. In these let*- bindings the fields are already wrapped, e.g. inputs will be bound to the value that the record field inputs will have, not to the raw value. I've attached a patch to fix this issue as well as a MWE to try it out. I'm not sure about the broader semantics of this patch, though. I fear that exposing raw values through let-binding probably eliminates the delayed/thunked nature of said fields in some ways. 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