Received: (at 57957) by debbugs.gnu.org; 24 Mar 2024 11:27:51 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Sun Mar 24 07:27:51 2024 Received: from localhost ([127.0.0.1]:50552 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1roM10-0002Wt-Or for submit <at> debbugs.gnu.org; Sun, 24 Mar 2024 07:27:51 -0400 Received: from eggs.gnu.org ([209.51.188.92]:52278) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <acorallo@HIDDEN>) id 1roM0x-0002WK-Ne; Sun, 24 Mar 2024 07:27:49 -0400 Received: from fencepost.gnu.org ([2001:470:142:3::e]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from <acorallo@HIDDEN>) id 1roM08-0004TM-IY; Sun, 24 Mar 2024 07:26:57 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=gnu.org; s=fencepost-gnu-org; h=MIME-Version:Date:References:In-Reply-To:Subject:To: From; bh=Otgr3gWtza0r+KUjHnMbkKQ3r21JkoNsh78pyM0nvXM=; b=kBBJy2UZeWCgEp+uPW9M 2mO3+dl5soevvODvzOrTiEh2S9C7nm8BxgtnNr+J3o54W5n3IL6uiHugZykp7lHe4UGXeqNfMDq93 yyHfA/biNe7qnbGh+ax59QEuZPAZIxM8j2cY6dy9SZtMtijgoPyezJJIdFnHRJnJKJwkIxRRW7KsZ zYQL+HJanOa3F183LfUD6vpQgWygCVNQQ5GIQgRvIn+htr07gz4YnYCNW0G8JedhFcwACLFNSl6RN f/0Xz3LJZ7caxRfajYB9WqLNiCnA7YEMaWefdx6r7QvFNLpJGoi8Wsr9hBHZZed8vTxEgE41aCZTc j1Wr6TGMowFWew==; Received: from acorallo by fencepost.gnu.org with local (Exim 4.90_1) (envelope-from <acorallo@HIDDEN>) id 1roM06-0005Oy-La; Sun, 24 Mar 2024 07:26:56 -0400 From: Andrea Corallo <acorallo@HIDDEN> To: Andrea Corallo <akrl@HIDDEN> Subject: Re: bug#69872: 29.2; Async native compilation of seq.el test uses up resources and hangs In-Reply-To: <xjfwn9v9gpx.fsf@HIDDEN> (Andrea Corallo's message of "Thu, 22 Sep 2022 22:39:22 +0000") References: <53a58362fbe449bc81eaf45ab66dd28d@HIDDEN> <87pmfqawm4.fsf@HIDDEN> <xjffsgkbko0.fsf@HIDDEN> <878rmb7j8k.fsf@HIDDEN> <m2pmfn4nr0.fsf@HIDDEN> <xjf1qs3bdfa.fsf@HIDDEN> <m2y1ubgy5b.fsf@HIDDEN> <jwvzger1gpb.fsf-monnier+emacs@HIDDEN> <xjfwn9v9gpx.fsf@HIDDEN> Date: Sun, 24 Mar 2024 07:26:52 -0400 Message-ID: <yp1v85brhtv.fsf_-_@HIDDEN> User-Agent: Gnus/5.13 (Gnus v5.13) MIME-Version: 1.0 Content-Type: text/plain X-Spam-Score: -2.3 (--) X-Debbugs-Envelope-To: 57957 Cc: Lars Tveito <larstvei@HIDDEN>, hokomo <hokomo@HIDDEN>, Gerd =?utf-8?Q?M=C3=B6llmann?= <gerd.moellmann@HIDDEN>, 57957 <at> debbugs.gnu.org, Stefan Monnier <monnier@HIDDEN>, 69872 <at> debbugs.gnu.org, Lars Ingebrigtsen <larsi@HIDDEN> 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: -3.3 (---) Andrea Corallo <akrl@HIDDEN> writes: > Stefan Monnier <monnier@HIDDEN> writes: > >>> The question is of course also how much effort circular lists deserve in >>> the compiler. From my point of view, not too much because they aren't >>> very useful, in code at least. And dealing with them costs runtime. >> >> Circular data structures are perfectly normal in source code under >> a `quote` but the code itself should never be cyclic (so I think it >> would be OK to signal an error (and/or to inf-loop) when asked to >> compile a chunk of code that has a cycle). So we *should* handle >> circular data structures correctly. > > I agree, Saturday I should have some time to look into this. A little time after... I finally managed to get to it, sorry for the delay. I've pushed into master c5de73a95a6, it fixes my reprodurer here and adds a test for this. If anyone could confirm this is fixed i'll be (extremely) happy to close this :) Thanks Andrea
bug-gnu-emacs@HIDDEN:bug#57957; Package emacs.
Full text available.Andrea Corallo <acorallo@HIDDEN>
to control <at> debbugs.gnu.org.
Full text available.Stefan Kangas <stefankangas@HIDDEN>
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From: "Basil L. Contovounesios" <contovob@HIDDEN>
To: Gerd =?utf-8?Q?M=C3=B6llmann?= <gerd.moellmann@HIDDEN>
Subject: Re: bug#57957: 29.0.50; Native compilation hangs on cyclic lists
In-Reply-To: <m2y1ubgy5b.fsf@HIDDEN> ("Gerd =?utf-8?Q?M=C3=B6llman?=
=?utf-8?Q?n=22's?= message of "Thu, 22 Sep 2022 18:41:04 +0200")
References: <53a58362fbe449bc81eaf45ab66dd28d@HIDDEN>
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Date: Sun, 25 Sep 2022 13:02:27 +0300
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Gerd M=C3=B6llmann [2022-09-22 18:41 +0200] wrote:
> Maybe some places could use cl-list-length? That function deals with
> circular lists and returns nil then. We could then refuse to compile.
Since Emacs 27 we also have proper-list-p for this.
--=20
Basil
bug-gnu-emacs@HIDDEN:bug#57957; Package emacs.
Full text available.Received: (at 57957) by debbugs.gnu.org; 22 Sep 2022 22:39:29 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Thu Sep 22 18:39:29 2022 Received: from localhost ([127.0.0.1]:38755 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1obUqu-0003qT-SS for submit <at> debbugs.gnu.org; Thu, 22 Sep 2022 18:39:29 -0400 Received: from mx.sdf.org ([205.166.94.24]:62404) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <akrl@HIDDEN>) id 1obUqt-0003qH-CZ for 57957 <at> debbugs.gnu.org; Thu, 22 Sep 2022 18:39:28 -0400 Received: from ma.sdf.org (ma.sdf.org [205.166.94.33]) by mx.sdf.org (8.15.2/8.14.5) with ESMTPS id 28MMdMXi013820 (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256 bits) verified NO); Thu, 22 Sep 2022 22:39:22 GMT From: Andrea Corallo <akrl@HIDDEN> To: Stefan Monnier <monnier@HIDDEN> Subject: Re: bug#57957: 29.0.50; Native compilation hangs on cyclic lists In-Reply-To: <jwvzger1gpb.fsf-monnier+emacs@HIDDEN> (Stefan Monnier's message of "Thu, 22 Sep 2022 13:10:09 -0400") References: <53a58362fbe449bc81eaf45ab66dd28d@HIDDEN> <87pmfqawm4.fsf@HIDDEN> <xjffsgkbko0.fsf@HIDDEN> <878rmb7j8k.fsf@HIDDEN> <m2pmfn4nr0.fsf@HIDDEN> <xjf1qs3bdfa.fsf@HIDDEN> <m2y1ubgy5b.fsf@HIDDEN> <jwvzger1gpb.fsf-monnier+emacs@HIDDEN> Date: Thu, 22 Sep 2022 22:39:22 +0000 Message-ID: <xjfwn9v9gpx.fsf@HIDDEN> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/29.0.50 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain X-Spam-Score: -0.0 (/) X-Debbugs-Envelope-To: 57957 Cc: Gerd =?utf-8?Q?M=C3=B6llmann?= <gerd.moellmann@HIDDEN>, Lars Ingebrigtsen <larsi@HIDDEN>, Lars Tveito <larstvei@HIDDEN>, 57957 <at> debbugs.gnu.org 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: -1.0 (-) Stefan Monnier <monnier@HIDDEN> writes: >> The question is of course also how much effort circular lists deserve in >> the compiler. From my point of view, not too much because they aren't >> very useful, in code at least. And dealing with them costs runtime. > > Circular data structures are perfectly normal in source code under > a `quote` but the code itself should never be cyclic (so I think it > would be OK to signal an error (and/or to inf-loop) when asked to > compile a chunk of code that has a cycle). So we *should* handle > circular data structures correctly. I agree, Saturday I should have some time to look into this. Andrea
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From: Stefan Monnier <monnier@HIDDEN>
To: Gerd =?windows-1252?Q?M=F6llmann?= <gerd.moellmann@HIDDEN>
Subject: Re: bug#57957: 29.0.50; Native compilation hangs on cyclic lists
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> The question is of course also how much effort circular lists deserve in
> the compiler. From my point of view, not too much because they aren't
> very useful, in code at least. And dealing with them costs runtime.
Circular data structures are perfectly normal in source code under
a `quote` but the code itself should never be cyclic (so I think it
would be OK to signal an error (and/or to inf-loop) when asked to
compile a chunk of code that has a cycle). So we *should* handle
circular data structures correctly.
Note: I don't know why we'd need/want to do a `subst-if` inside
a `quote` and haven't looked at this bug or at the `comp.el` code to
know what we're really talking about.
Stefan
bug-gnu-emacs@HIDDEN:bug#57957; Package emacs.
Full text available.Received: (at 57957) by debbugs.gnu.org; 22 Sep 2022 16:41:17 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Thu Sep 22 12:41:17 2022 Received: from localhost ([127.0.0.1]:38383 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1obPGH-0003MK-86 for submit <at> debbugs.gnu.org; Thu, 22 Sep 2022 12:41:17 -0400 Received: from mail-ej1-f50.google.com ([209.85.218.50]:45692) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <gerd.moellmann@HIDDEN>) id 1obPGD-0003M4-44 for 57957 <at> debbugs.gnu.org; Thu, 22 Sep 2022 12:41:15 -0400 Received: by mail-ej1-f50.google.com with SMTP id dv25so22224612ejb.12 for <57957 <at> debbugs.gnu.org>; Thu, 22 Sep 2022 09:41:13 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=mime-version:user-agent:message-id:date:references:in-reply-to :subject:cc:to:from:from:to:cc:subject:date; bh=8CE3m1cQYIJnWQfuimLoiFxb2Nh127e4SFdJhnI5A5M=; b=HKksrDfRb35irYkZX0TybeH8nK45r8iJS0w0DQK6jC25VtZonBXachrUsHY7HWA3JQ j7kjlLH9aAwOnPy1wtmlwEnjmCnh4M8do7wyE6sUT3VWNQUZlCxlnyhgCLhih5a5J+ns REdhNxHknjZaD37GJSpwyLOy6WXPPc+nAY+vfTe+ljBg6o7UETQj7JHDFzd/dVDTAt7a 0alexy+vH/1DBHim3M8zJ67oMofRW63lGxa4qb5y3v3Ta97tCjRmq63ScvEew8HeRxA1 Jn/pKR/F0b8UVnxio7/jvF3M5QG0gDx/MsWB+ziB1Ny7RKyMABY7TpZLhs3DabpygdF5 w1bw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=mime-version:user-agent:message-id:date:references:in-reply-to :subject:cc:to:from:x-gm-message-state:from:to:cc:subject:date; bh=8CE3m1cQYIJnWQfuimLoiFxb2Nh127e4SFdJhnI5A5M=; b=7VGQD1h9xyjzOEm7bPfq/Kq12yS85mZNsZRuXmARaxhb73o1BF1/ckWx9trZEax7+J FjunipiKKvhuCiQ9Zj1FOXW2DBwFjJCnbmF/m2dH1l/R3s4exDE+eReH3hgeCN8KXyM5 pCBHyVvig4E/qHAjcmRtOsfJlorcNc9Xmh0gpVzffm+jqDmbE94Bh6lXpo3SU/D50JCn AYdzr0MH9DWzHhRMNiYLObdcQxFsdMb/rKCJnhwrQmWQg9qmyokrSzUsnsUWgy51Dyyp 36roZ9WMarUp/JaukX7vL9pozxFyqIIM3KIKvUqJtnQdZL2g3naWN+omKEGIlDovujXm tUUQ== X-Gm-Message-State: ACrzQf3tFDRl+jYF022tLleagYCXBMJRLkd8Nt4NRGUxXQ+sNeY7tMWk emmKI/XtoOf/X1hYjGBCxKc= X-Google-Smtp-Source: AMsMyM6e9H3DsCkyrWvpleZGSsKJfuE8eFjplqHBuNMWX1p2ySu9HWAjA3EnY3gHmnZeAScOjdRdTQ== X-Received: by 2002:a17:907:7293:b0:782:2665:aa39 with SMTP id dt19-20020a170907729300b007822665aa39mr3556462ejc.303.1663864867043; Thu, 22 Sep 2022 09:41:07 -0700 (PDT) Received: from Mini.fritz.box (pd9e3680c.dip0.t-ipconnect.de. [217.227.104.12]) by smtp.gmail.com with ESMTPSA id w8-20020a17090652c800b00780ab5a9116sm2817192ejn.211.2022.09.22.09.41.05 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 22 Sep 2022 09:41:06 -0700 (PDT) From: =?utf-8?Q?Gerd_M=C3=B6llmann?= <gerd.moellmann@HIDDEN> To: Andrea Corallo <akrl@HIDDEN> Subject: Re: bug#57957: 29.0.50; Native compilation hangs on cyclic lists In-Reply-To: <xjf1qs3bdfa.fsf@HIDDEN> (Andrea Corallo's message of "Thu, 22 Sep 2022 16:07:37 +0000") References: <53a58362fbe449bc81eaf45ab66dd28d@HIDDEN> <87pmfqawm4.fsf@HIDDEN> <xjffsgkbko0.fsf@HIDDEN> <878rmb7j8k.fsf@HIDDEN> <m2pmfn4nr0.fsf@HIDDEN> <xjf1qs3bdfa.fsf@HIDDEN> Date: Thu, 22 Sep 2022 18:41:04 +0200 Message-ID: <m2y1ubgy5b.fsf@HIDDEN> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/29.0.50 (darwin) MIME-Version: 1.0 Content-Type: text/plain X-Spam-Score: 0.0 (/) X-Debbugs-Envelope-To: 57957 Cc: Lars Ingebrigtsen <larsi@HIDDEN>, Lars Tveito <larstvei@HIDDEN>, 57957 <at> debbugs.gnu.org, Stefan Monnier <monnier@HIDDEN> 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: -1.0 (-) Andrea Corallo <akrl@HIDDEN> writes: >>>>From Common Lisp I can say that these functions expect a "tree", >> i.e. not a circular list. > > Okay I tried an adhoc substitute but this is not the only place in the > compiler not robust against cyclic lists, so more work will be needed. The question is of course also how much effort circular lists deserve in the compiler. From my point of view, not too much because they aren't very useful, in code at least. And dealing with them costs runtime. Maybe some places could use cl-list-length? That function deals with circular lists and returns nil then. We could then refuse to compile.
bug-gnu-emacs@HIDDEN:bug#57957; Package emacs.
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From: Andrea Corallo <akrl@HIDDEN>
To: Gerd =?utf-8?Q?M=C3=B6llmann?= <gerd.moellmann@HIDDEN>
Subject: Re: bug#57957: 29.0.50; Native compilation hangs on cyclic lists
In-Reply-To: <m2pmfn4nr0.fsf@HIDDEN> ("Gerd =?utf-8?Q?M=C3=B6llman?=
=?utf-8?Q?n=22's?= message of "Thu, 22 Sep 2022 14:06:27 +0200")
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Date: Thu, 22 Sep 2022 16:07:37 +0000
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Gerd M=C3=B6llmann <gerd.moellmann@HIDDEN> writes:
> Lars Ingebrigtsen <larsi@HIDDEN> writes:
>
>> Andrea Corallo <akrl@HIDDEN> writes:
>>
>>> I see nor cl-nsubst-if nor cl-subst-if are robust against cyclic lists.
>>> Is this a bug in cl-lib or is it expected? In case I'll add an ad-hoc
>>> substitute for this use (if there's no other alternative).
>>
>> I'm not sure -- Stefan probably knows; added to the CCs.
>
>>From Common Lisp I can say that these functions expect a "tree",
> i.e. not a circular list.
Okay I tried an adhoc substitute but this is not the only place in the
compiler not robust against cyclic lists, so more work will be needed.
Andrea
bug-gnu-emacs@HIDDEN:bug#57957; Package emacs.
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From: Stefan Monnier <monnier@HIDDEN>
To: Lars Ingebrigtsen <larsi@HIDDEN>
Subject: Re: bug#57957: 29.0.50; Native compilation hangs on cyclic lists
In-Reply-To: <878rmb7j8k.fsf@HIDDEN> (Lars Ingebrigtsen's message of "Thu,
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Lars Ingebrigtsen [2022-09-22 13:15:39] wrote:
> Andrea Corallo <akrl@HIDDEN> writes:
>> I see nor cl-nsubst-if nor cl-subst-if are robust against cyclic lists.
>> Is this a bug in cl-lib or is it expected? In case I'll add an ad-hoc
>> substitute for this use (if there's no other alternative).
> I'm not sure -- Stefan probably knows; added to the CCs.
Sorry, but these functions come straight for the `cl.el` lib that was
there before I started using Emacs.
Stefan
bug-gnu-emacs@HIDDEN:bug#57957; Package emacs.
Full text available.Received: (at 57957) by debbugs.gnu.org; 22 Sep 2022 12:06:44 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Thu Sep 22 08:06:44 2022 Received: from localhost ([127.0.0.1]:36529 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1obKya-0002EG-2M for submit <at> debbugs.gnu.org; Thu, 22 Sep 2022 08:06:44 -0400 Received: from mail-ej1-f45.google.com ([209.85.218.45]:41521) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <gerd.moellmann@HIDDEN>) id 1obKyX-0002Dz-Hd for 57957 <at> debbugs.gnu.org; Thu, 22 Sep 2022 08:06:42 -0400 Received: by mail-ej1-f45.google.com with SMTP id hy2so16854569ejc.8 for <57957 <at> debbugs.gnu.org>; Thu, 22 Sep 2022 05:06:41 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=mime-version:user-agent:message-id:date:references:in-reply-to :subject:cc:to:from:from:to:cc:subject:date; bh=QWIHlNy9vQNAVRp77AZi/M7fi7W4AT158wD68I0BBkw=; b=HVl3JGO/oJq3gD5TUl2PTPUSRzpxWrtaJilw4coQDBFkPzqUdPjifcK0x6BJz01pZk VlrAoxun0csAngOhdxOSIS3viZ5fg/Oa0De/hl+dimiP5+gH3XBFfyQD+BahCsDy1/Nq lbfizpAOnnnpxw/i7p8V6Dj60hes2l4fFdvSU+/sSVGyfEIPNcUvAfAj8ElPdpb8EFMw BkMCt4a9ZNsAnnjfo8/8EDRzf2i5DnB/KliR4jZg0YRKOVwRLe6l/+7LFANnwbHC85Qb eQV1fbPFcyjaCSoz/VrD0JSdPBsw+GXPIMUyeD+rAf8QiiDWy6y1MYIVeCBMkxmhXjzh lWdA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=mime-version:user-agent:message-id:date:references:in-reply-to :subject:cc:to:from:x-gm-message-state:from:to:cc:subject:date; bh=QWIHlNy9vQNAVRp77AZi/M7fi7W4AT158wD68I0BBkw=; b=rcvQy2ccgXMdZw89ql2oL3TOTMGpkqElC4VlfYD9sGkd8+hftzuzOZzc2UyJeXmEvt eLpQiF42aIdoQ0rsrspdWG0XdkSZgDhkCDryppy5NSB5S+TudmzsDCDoJgbzrL2HokJ4 KW5UY51z0M8R50SNRfUXD4ynkASRZ8v/KbgHe9W25nkXno2wbTJQkigSA0YFlZyRSnsT OvnP7aZKMwx7lDRwsus/NdPXXb2BwAocssW7kMvPDtpXcsMsOX6IcyX/F7FseH7ZR9lG tS43HXac3vYsIhVv8pSdDXcwG/g2JMiUNyMa5pgiDBER39VjXSXyy0uvfYz7z38sDTk7 /uew== X-Gm-Message-State: ACrzQf0EXBldCrnkO/lpcvg8g/4r69nfCP1h1W2nKDC1GbIReMcY/KiV FjmfCtkFbiJ57yRYiqOP+PM= X-Google-Smtp-Source: AMsMyM5ANeMrMLyZfpubjcsg7fxjFU3HgA4mxP68OvTwImSTNgf051rD8QKVFSslQxKt2U650EX9JQ== X-Received: by 2002:a17:907:3e0b:b0:780:a882:d2fd with SMTP id hp11-20020a1709073e0b00b00780a882d2fdmr2455670ejc.564.1663848390724; Thu, 22 Sep 2022 05:06:30 -0700 (PDT) Received: from Mini.fritz.box (pd9e3680c.dip0.t-ipconnect.de. [217.227.104.12]) by smtp.gmail.com with ESMTPSA id bq17-20020a056402215100b0044e7d69091asm3535120edb.85.2022.09.22.05.06.29 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 22 Sep 2022 05:06:29 -0700 (PDT) From: =?utf-8?Q?Gerd_M=C3=B6llmann?= <gerd.moellmann@HIDDEN> To: Lars Ingebrigtsen <larsi@HIDDEN> Subject: Re: bug#57957: 29.0.50; Native compilation hangs on cyclic lists In-Reply-To: <878rmb7j8k.fsf@HIDDEN> (Lars Ingebrigtsen's message of "Thu, 22 Sep 2022 13:15:39 +0200") References: <53a58362fbe449bc81eaf45ab66dd28d@HIDDEN> <87pmfqawm4.fsf@HIDDEN> <xjffsgkbko0.fsf@HIDDEN> <878rmb7j8k.fsf@HIDDEN> Date: Thu, 22 Sep 2022 14:06:27 +0200 Message-ID: <m2pmfn4nr0.fsf@HIDDEN> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/29.0.50 (darwin) MIME-Version: 1.0 Content-Type: text/plain X-Spam-Score: 0.0 (/) X-Debbugs-Envelope-To: 57957 Cc: 57957 <at> debbugs.gnu.org, Lars Tveito <larstvei@HIDDEN>, Stefan Monnier <monnier@HIDDEN>, Andrea Corallo <akrl@HIDDEN> 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: -1.0 (-) Lars Ingebrigtsen <larsi@HIDDEN> writes: > Andrea Corallo <akrl@HIDDEN> writes: > >> I see nor cl-nsubst-if nor cl-subst-if are robust against cyclic lists. >> Is this a bug in cl-lib or is it expected? In case I'll add an ad-hoc >> substitute for this use (if there's no other alternative). > > I'm not sure -- Stefan probably knows; added to the CCs. From Common Lisp I can say that these functions expect a "tree", i.e. not a circular list.
bug-gnu-emacs@HIDDEN:bug#57957; Package emacs.
Full text available.Received: (at 57957) by debbugs.gnu.org; 22 Sep 2022 11:15:54 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Thu Sep 22 07:15:54 2022 Received: from localhost ([127.0.0.1]:36507 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1obKBN-00079q-UY for submit <at> debbugs.gnu.org; Thu, 22 Sep 2022 07:15:54 -0400 Received: from quimby.gnus.org ([95.216.78.240]:53514) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <larsi@HIDDEN>) id 1obKBK-00079Z-Vd for 57957 <at> debbugs.gnu.org; Thu, 22 Sep 2022 07:15:52 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=gnus.org; s=20200322; h=Content-Type:MIME-Version:Message-ID:Date:References: In-Reply-To:Subject:Cc:To:From:Sender:Reply-To:Content-Transfer-Encoding: Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender: Resent-To:Resent-Cc:Resent-Message-ID:List-Id:List-Help:List-Unsubscribe: List-Subscribe:List-Post:List-Owner:List-Archive; bh=/iWBr+U8JWhciHxyzuHlV1POdXlhVUJJi77icQxFbSM=; b=ptbXZRatkeHnQuwoUSjCIkeef4 jB5Jwr5YOI7ua68mbS9T6RTz8PLy2arvNdHZWBuRu31svEMJIaOu3LmayFBoRMkH/eGR3jvPao9+N PMgRkKlaBbI6nsicXGfDVqumprxmp8zpi0ImcQQv2EagAf1vj2JFi92ahNJ0Kb8y7lD4=; Received: from [84.212.220.105] (helo=joga) by quimby.gnus.org with esmtpsa (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from <larsi@HIDDEN>) id 1obKBA-00083W-3F; Thu, 22 Sep 2022 13:15:43 +0200 From: Lars Ingebrigtsen <larsi@HIDDEN> To: Andrea Corallo <akrl@HIDDEN> Subject: Re: bug#57957: 29.0.50; Native compilation hangs on cyclic lists In-Reply-To: <xjffsgkbko0.fsf@HIDDEN> (Andrea Corallo's message of "Wed, 21 Sep 2022 19:18:55 +0000") References: <53a58362fbe449bc81eaf45ab66dd28d@HIDDEN> <87pmfqawm4.fsf@HIDDEN> <xjffsgkbko0.fsf@HIDDEN> Face: iVBORw0KGgoAAAANSUhEUgAAADAAAAAwBAMAAAClLOS0AAAABGdBTUEAALGPC/xhBQAAACBj SFJNAAB6JgAAgIQAAPoAAACA6AAAdTAAAOpgAAA6mAAAF3CculE8AAAAFVBMVEVJP0lmb5iopK/X 1NgbGCD49/f///8745hEAAAAAWJLR0QGYWa4fQAAAAd0SU1FB+YJFgsLNc25ygQAAAGHSURBVDjL ddTBjoMgEADQQdk7UHu3Q3tXSe9jwgdsa/z/X9kBwRVsJ2kaec4AExAAhNZaQQyBk3PO8s9tA9KT 9AHM+7m+HysH8LPkIdoyzIvBbiBJUgYIMKWMFDGP4VFDRDDjYx3PQBtcv2QMxwxe7Z5RAGTg0f5Y KicmWCLwDil7ApeAYxvXOFydSqVoBwLEoXn2/5NnIHsZftYzeK/b389gmy+A7W+79s8TkGpfn0G2 SwUydbcJcJwjdYTExGDdDjK3UtjLekeHZQb/QWPXu11cCdz1AFxqKSdnUA1yhiuXSyC1aqYF7FIu dzad7mc+rDUIknrkRLTVBoX0xvERRlMBn1MzhRdA2wL4yBuU8WDA9QjE05ue4qUQzyOQMPoF29m7 7kBcnGNM/Zz3lij+401gbnSGOQA/XrCLIDNotb1p7JA7vfUqgIxL0IdS6R6EsUblu3K4N8Ii2unm 266GmzLWvb27V+Cpmw3y3uPXwJcR1hGjBi6It/htOcHML0M1R1HzyzD8AZ6b4XXBm5FcAAAAJXRF WHRkYXRlOmNyZWF0ZQAyMDIyLTA5LTIyVDExOjExOjUzKzAwOjAwuM4f/wAAACV0RVh0ZGF0ZTpt b2RpZnkAMjAyMi0wOS0yMlQxMToxMTo1MyswMDowMMmTp0MAAAAASUVORK5CYII= X-Now-Playing: Carole King's _Tapestry_: "It's Too Late" Date: Thu, 22 Sep 2022 13:15:39 +0200 Message-ID: <878rmb7j8k.fsf@HIDDEN> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/29.0.50 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain X-Spam-Report: Spam detection software, running on the system "quimby.gnus.org", has NOT identified this incoming email as spam. The original message has been attached to this so you can view it or label similar future email. If you have any questions, see @@CONTACT_ADDRESS@@ for details. Content preview: Andrea Corallo <akrl@HIDDEN> writes: > I see nor cl-nsubst-if nor cl-subst-if are robust against cyclic lists. > Is this a bug in cl-lib or is it expected? In case I'll add an ad-hoc > substitute for this use (if there's no other alterna [...] Content analysis details: (-2.9 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -1.0 ALL_TRUSTED Passed through trusted hosts only via SMTP -1.9 BAYES_00 BODY: Bayes spam probability is 0 to 1% [score: 0.0000] X-Spam-Score: -2.3 (--) X-Debbugs-Envelope-To: 57957 Cc: 57957 <at> debbugs.gnu.org, Lars Tveito <larstvei@HIDDEN>, Stefan Monnier <monnier@HIDDEN> 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: -3.3 (---) Andrea Corallo <akrl@HIDDEN> writes: > I see nor cl-nsubst-if nor cl-subst-if are robust against cyclic lists. > Is this a bug in cl-lib or is it expected? In case I'll add an ad-hoc > substitute for this use (if there's no other alternative). I'm not sure -- Stefan probably knows; added to the CCs.
bug-gnu-emacs@HIDDEN:bug#57957; Package emacs.
Full text available.Received: (at 57957) by debbugs.gnu.org; 21 Sep 2022 19:19:01 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Wed Sep 21 15:19:01 2022 Received: from localhost ([127.0.0.1]:35262 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1ob5FM-0002Vc-S7 for submit <at> debbugs.gnu.org; Wed, 21 Sep 2022 15:19:01 -0400 Received: from mx.sdf.org ([205.166.94.24]:65348) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <akrl@HIDDEN>) id 1ob5FK-0002VT-S9 for 57957 <at> debbugs.gnu.org; Wed, 21 Sep 2022 15:18:59 -0400 Received: from ma.sdf.org (ma.sdf.org [205.166.94.33]) by mx.sdf.org (8.15.2/8.14.5) with ESMTPS id 28LJItgk027932 (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256 bits) verified NO); Wed, 21 Sep 2022 19:18:56 GMT From: Andrea Corallo <akrl@HIDDEN> To: Lars Ingebrigtsen <larsi@HIDDEN> Subject: Re: bug#57957: 29.0.50; Native compilation hangs on cyclic lists In-Reply-To: <87pmfqawm4.fsf@HIDDEN> (Lars Ingebrigtsen's message of "Tue, 20 Sep 2022 17:33:55 +0200") References: <53a58362fbe449bc81eaf45ab66dd28d@HIDDEN> <87pmfqawm4.fsf@HIDDEN> Date: Wed, 21 Sep 2022 19:18:55 +0000 Message-ID: <xjffsgkbko0.fsf@HIDDEN> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/29.0.50 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain X-Spam-Score: -0.0 (/) X-Debbugs-Envelope-To: 57957 Cc: 57957 <at> debbugs.gnu.org, Lars Tveito <larstvei@HIDDEN> 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: -1.0 (-) Lars Ingebrigtsen <larsi@HIDDEN> writes: > Lars Tveito <larstvei@HIDDEN> writes: > >> Evaluating the two following forms results in Emacs hanging: >> >> (defun test-cycle () >> '#1=(a . #1#)) >> >> (native-compile 'test-cycle) > > It seems to be inflooping in comp-ssa-rename. A debug-on-quit backtrace > included below. > > I've added Andrea to the CCs; perhaps he has some comments. I see nor cl-nsubst-if nor cl-subst-if are robust against cyclic lists. Is this a bug in cl-lib or is it expected? In case I'll add an ad-hoc substitute for this use (if there's no other alternative). Andrea
bug-gnu-emacs@HIDDEN:bug#57957; Package emacs.
Full text available.Lars Ingebrigtsen <larsi@HIDDEN>
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From: Lars Ingebrigtsen <larsi@HIDDEN>
To: Lars Tveito <larstvei@HIDDEN>
Subject: Re: bug#57957: 29.0.50; Native compilation hangs on cyclic lists
In-Reply-To: <53a58362fbe449bc81eaf45ab66dd28d@HIDDEN> (Lars Tveito's
message of "Tue, 20 Sep 2022 07:55:48 +0000")
References: <53a58362fbe449bc81eaf45ab66dd28d@HIDDEN>
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Content preview: Lars Tveito <larstvei@HIDDEN> writes: > Evaluating the
two following forms results in Emacs hanging: > > (defun test-cycle () >
'#1=(a . #1#)) > > (native-compile 'test-cycle) It seems to be inflooping
in comp-ssa-rename. A debug-on-quit backtrace included below.
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Lars Tveito <larstvei@HIDDEN> writes:
> Evaluating the two following forms results in Emacs hanging:
>
> (defun test-cycle ()
> '#1=(a . #1#))
>
> (native-compile 'test-cycle)
It seems to be inflooping in comp-ssa-rename. A debug-on-quit backtrace
included below.
I've added Andrea to the CCs; perhaps he has some comments.
Debugger entered--Lisp error: (quit)
#f(compiled-function (x) #<bytecode -0xadd90b5d8edcf84>)((a . #1))
cl--nsublis-rec((a . #1))
cl--nsublis-rec(((a . #2)))
cl--nsublis-rec((((a . #3))))
cl-nsublis(((nil . #s(comp-mvar :typeset (t) :valset nil :range nil :
cl-nsubst-if(#s(comp-mvar :typeset (t) :valset nil :range nil :neg ni
comp-ssa-rename-insn((setimm #s(comp-mvar :typeset (t) :valset nil :r
#f(compiled-function (bb in-frame) #<bytecode -0xdf66bba587123ea>)(#s
#f(compiled-function (bb in-frame) #<bytecode -0xdf66bba587123ea>)(#s
comp-ssa-rename()
#<subr F616e6f6e796d6f75732d6c616d626461_anonymous_lambda_112>("F7465
comp-ssa()
comp-fwprop(nil)
funcall(comp-fwprop nil)
(setq data (funcall pass data))
(if (memq pass comp-disabled-passes) (progn) (comp-log (format "(%s)
(while (progn (setq t0 (current-time)) (consp --cl-var--)) (setq pass
(let* ((report nil) (t0 nil) (--cl-var-- comp-passes) (pass nil) (--c
...
bug-gnu-emacs@HIDDEN:bug#57957; Package emacs.
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From: Lars Tveito <larstvei@HIDDEN>
To: "bug-gnu-emacs@HIDDEN" <bug-gnu-emacs@HIDDEN>
Subject: 29.0.50; Native compilation hangs on cyclic lists
Thread-Topic: 29.0.50; Native compilation hangs on cyclic lists
Thread-Index: AQHYzMV6U3mCgU+RZU6MS25NemWoog==
Date: Tue, 20 Sep 2022 07:55:48 +0000
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Evaluating the two following forms results in Emacs hanging:
(defun test-cycle ()
'#1=3D(a . #1#))
(native-compile 'test-cycle)
The bug has been reproduced on a system running Debian as well.
- Lars
=20
In GNU Emacs 29.0.50 (build 1, aarch64-apple-darwin21.6.0, NS
appkit-2113.60 Version 12.6 (Build 21G115))
Windowing system distributor 'Apple', version 10.3.2113
System Description: macOS 12.6
Configured using:
'configure
--prefix=3D/nix/store/wf6wjsvvs3q7k0vf3xlfzi3ik8v3601n-emacs-29.0.50
--disable-build-details --with-modules --with-ns
--disable-ns-self-contained --with-native-compilation'
Configured features:
ACL GLIB GMP GNUTLS JPEG JSON LIBXML2 MODULES NATIVE_COMP NOTIFY KQUEUE
NS PDUMPER PNG RSVG SQLITE3 THREADS TIFF TOOLKIT_SCROLL_BARS ZLIB
Important settings:
value of $EMACSLOADPATH: /nix/store/87hrwgmnic6hhjl6p7ch30ik90dpw324-emac=
s-packages-deps/share/emacs/site-lisp:
value of $EMACSNATIVELOADPATH: /nix/store/87hrwgmnic6hhjl6p7ch30ik90dpw32=
4-emacs-packages-deps/share/emacs/native-lisp::
value of $LC_CTYPE: UTF-8
locale-coding-system: utf-8-unix
Major mode: Lisp Interaction
Minor modes in effect:
tooltip-mode: t
global-eldoc-mode: t
eldoc-mode: t
show-paren-mode: t
electric-indent-mode: t
mouse-wheel-mode: t
tool-bar-mode: t
menu-bar-mode: t
file-name-shadow-mode: t
global-font-lock-mode: t
font-lock-mode: t
blink-cursor-mode: t
line-number-mode: t
indent-tabs-mode: t
transient-mark-mode: t
auto-composition-mode: t
auto-encryption-mode: t
auto-compression-mode: t
Load-path shadows:
/nix/store/87hrwgmnic6hhjl6p7ch30ik90dpw324-emacs-packages-deps/share/emacs=
/site-lisp/elpa/let-alist-1.0.6/let-alist hides /nix/store/wf6wjsvvs3q7k0vf=
3xlfzi3ik8v3601n-emacs-29.0.50/share/emacs/29.0.50/lisp/emacs-lisp/let-alis=
t
/nix/store/87hrwgmnic6hhjl6p7ch30ik90dpw324-emacs-packages-deps/share/emacs=
/site-lisp/elpa/nadvice-0.3/nadvice hides /nix/store/wf6wjsvvs3q7k0vf3xlfzi=
3ik8v3601n-emacs-29.0.50/share/emacs/29.0.50/lisp/emacs-lisp/nadvice
Features:
(shadow sort mail-extr emacsbug message mailcap yank-media puny dired
dired-loaddefs rfc822 mml mml-sec password-cache epa derived epg rfc6068
epg-config gnus-util text-property-search time-date mm-decode mm-bodies
mm-encode mail-parse rfc2231 mailabbrev gmm-utils mailheader cl-loaddefs
comp comp-cstr warnings icons subr-x rx cl-seq cl-macs gv cl-extra
help-mode bytecomp byte-compile cconv cl-lib sendmail rfc2047 rfc2045
ietf-drums mm-util mail-prsvr mail-utils rmc iso-transl tooltip eldoc
paren electric uniquify ediff-hook vc-hooks lisp-float-type elisp-mode
mwheel term/ns-win ns-win ucs-normalize mule-util term/common-win
tool-bar dnd fontset image regexp-opt fringe tabulated-list replace
newcomment text-mode lisp-mode prog-mode register page tab-bar menu-bar
rfn-eshadow isearch easymenu timer select scroll-bar mouse jit-lock
font-lock syntax font-core term/tty-colors frame minibuffer nadvice seq
simple cl-generic indonesian philippine cham georgian utf-8-lang
misc-lang vietnamese tibetan thai tai-viet lao korean japanese eucjp-ms
cp51932 hebrew greek romanian slovak czech european ethiopic indian
cyrillic chinese composite emoji-zwj charscript charprop case-table
epa-hook jka-cmpr-hook help abbrev obarray oclosure cl-preloaded button
loaddefs faces cus-face macroexp files window text-properties overlay
sha1 md5 base64 format env code-pages mule custom widget keymap
hashtable-print-readable backquote threads kqueue cocoa ns multi-tty
make-network-process native-compile emacs)
Memory information:
((conses 16 78425 6959)
(symbols 48 7029 0)
(strings 32 19124 2018)
(string-bytes 1 599871)
(vectors 16 16700)
(vector-slots 8 325741 9902)
(floats 8 27 31)
(intervals 56 320 0)
(buffers 1000 12))=
Lars Tveito <larstvei@HIDDEN>:bug-gnu-emacs@HIDDEN.
Full text available.bug-gnu-emacs@HIDDEN:bug#57957; Package emacs.
Full text available.
GNU bug tracking system
Copyright (C) 1999 Darren O. Benham,
1997 nCipher Corporation Ltd,
1994-97 Ian Jackson.