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[80.217.1.132]) by smtp.gmail.com with ESMTPSA id 2adb3069b0e04-521f38d8b44sm3376307e87.209.2024.05.17.10.08.16 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Fri, 17 May 2024 10:08:16 -0700 (PDT) Content-Type: text/plain; charset=us-ascii Mime-Version: 1.0 (Mac OS X Mail 14.0 \(3654.120.0.1.15\)) Subject: Re: bug#70988: (read FUNCTION) uses Latin-1 [PATCH] From: =?utf-8?Q?Mattias_Engdeg=C3=A5rd?= <mattias.engdegard@HIDDEN> In-Reply-To: <8634qghg2j.fsf@HIDDEN> Date: Fri, 17 May 2024 19:08:15 +0200 Content-Transfer-Encoding: quoted-printable Message-Id: <74B41A66-5B3C-4A09-A5F4-A389464BDA27@HIDDEN> References: <37B5B5D0-9C0B-4E1C-9F3C-6CA647612E08@HIDDEN> <86seyhh9uv.fsf@HIDDEN> <E13B82E6-8A2F-4D1B-B0A0-8D251270685F@HIDDEN> <86le49h6sm.fsf@HIDDEN> <BBC28443-929B-4EE8-8773-984C5CD948CA@HIDDEN> <8634qghg2j.fsf@HIDDEN> To: Eli Zaretskii <eliz@HIDDEN> X-Mailer: Apple Mail (2.3654.120.0.1.15) X-Spam-Score: 0.0 (/) X-Debbugs-Envelope-To: 70988 Cc: 70988 <at> debbugs.gnu.org, 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 (-) 17 maj 2024 kl. 12.45 skrev Eli Zaretskii <eliz@HIDDEN>: >>>>> Is it an accident that the code does the same only _after_ the = call to >>>>> readbyte? >>>>=20 >>>> Yes, I have no reason to believe otherwise. >>>=20 >>> To me, it actually looks as done on purpose. >>=20 >> You could very well be right about that. What I meant is that the = order doesn't matter at all. >=20 > Doesn't it affect what the readbyte call does? No -- the `*multibyte =3D ...` assignment is just an extra return value, = which indicates whether the returned values come from a unibyte or = multibyte source. For any given source (READCHARFUN, in the terminology = of lread.c), the characters will all be unibyte or multibyte, so this = returned `multibyte` flag will typically only be used once by the caller = and saved for future reference. But you are right to question it because lread.c is a royal mess and = many changes have not been made in a clean way. It is unclear whether = it's worth returning the `multibyte` flag at all; it's only used in = special cases.
bug-gnu-emacs@HIDDEN:bug#70988; Package emacs.
Full text available.Received: (at 70988) by debbugs.gnu.org; 17 May 2024 10:48:21 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Fri May 17 06:48:21 2024 Received: from localhost ([127.0.0.1]:54476 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1s7v8P-00053u-3L for submit <at> debbugs.gnu.org; Fri, 17 May 2024 06:48:21 -0400 Received: from eggs.gnu.org ([209.51.188.92]:47900) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <eliz@HIDDEN>) id 1s7v8M-00053b-Tm for 70988 <at> debbugs.gnu.org; Fri, 17 May 2024 06:48:19 -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 <eliz@HIDDEN>) id 1s7v66-00009c-Oh; Fri, 17 May 2024 06:45:58 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=gnu.org; s=fencepost-gnu-org; h=MIME-version:References:Subject:In-Reply-To:To:From: Date; bh=Vpdii4anCedPOBeN+wrwEJG+fbfiUCbKuIKW6QbpXSM=; b=JLXU/5SiFo745zP/ephu NTeyUsiAtcLm8mkCxP8+xrBGV/sJnEFea+cHU4YAm8um0aWOl4y9DuGV21NqrniZe6iz1Q+t7EpFG S0YcX9xY2QC+sEJBmA21/GDNoKK9rfJxT5TbLKD51/2ghV62JEPi1HkEuheIY38hOrB8LePP8beJZ 7JcR9Uhx40268BQivH/FaYZN0TxblocbIvb0B6ONeCcD3M2LrcElZxm7nuaPikGgaspAqotrR3Sjd 7BPr1DcQLCSvOOwiwx7x7e0ynUZL+S47UuCQ4rf4L3aLAOD9vQog8oQbrp9cb/1UqSSlXzxa5F/WM ALelADJDTSDSrw==; Date: Fri, 17 May 2024 13:45:56 +0300 Message-Id: <8634qghg2j.fsf@HIDDEN> From: Eli Zaretskii <eliz@HIDDEN> To: Mattias =?utf-8?Q?Engdeg=C3=A5rd?= <mattias.engdegard@HIDDEN> In-Reply-To: <BBC28443-929B-4EE8-8773-984C5CD948CA@HIDDEN> (message from Mattias =?utf-8?Q?Engdeg=C3=A5rd?= on Fri, 17 May 2024 10:08:58 +0200) Subject: Re: bug#70988: (read FUNCTION) uses Latin-1 [PATCH] References: <37B5B5D0-9C0B-4E1C-9F3C-6CA647612E08@HIDDEN> <86seyhh9uv.fsf@HIDDEN> <E13B82E6-8A2F-4D1B-B0A0-8D251270685F@HIDDEN> <86le49h6sm.fsf@HIDDEN> <BBC28443-929B-4EE8-8773-984C5CD948CA@HIDDEN> MIME-version: 1.0 Content-type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit X-Spam-Score: -2.3 (--) X-Debbugs-Envelope-To: 70988 Cc: 70988 <at> debbugs.gnu.org, 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 (---) > From: Mattias Engdegård <mattias.engdegard@HIDDEN> > Date: Fri, 17 May 2024 10:08:58 +0200 > Cc: 70988 <at> debbugs.gnu.org, > monnier@HIDDEN > > 16 maj 2024 kl. 21.54 skrev Eli Zaretskii <eliz@HIDDEN>: > > >>> Is it an accident that the code does the same only _after_ the call to > >>> readbyte? > >> > >> Yes, I have no reason to believe otherwise. > > > > To me, it actually looks as done on purpose. > > You could very well be right about that. What I meant is that the order doesn't matter at all. Doesn't it affect what the readbyte call does?
bug-gnu-emacs@HIDDEN:bug#70988; Package emacs.
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bug-gnu-emacs@HIDDEN:bug#70988; Package emacs.
Full text available.Received: (at 70988) by debbugs.gnu.org; 16 May 2024 19:54:14 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Thu May 16 15:54:14 2024 Received: from localhost ([127.0.0.1]:50666 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1s7hB8-00036O-1T for submit <at> debbugs.gnu.org; Thu, 16 May 2024 15:54:14 -0400 Received: from eggs.gnu.org ([209.51.188.92]:34504) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <eliz@HIDDEN>) id 1s7hB5-00036G-NT for 70988 <at> debbugs.gnu.org; Thu, 16 May 2024 15:54:12 -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 <eliz@HIDDEN>) id 1s7hAy-0003I3-0B; Thu, 16 May 2024 15:54:04 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=gnu.org; s=fencepost-gnu-org; h=MIME-version:References:Subject:In-Reply-To:To:From: Date; bh=DkVuF7ZYZ/mECwjWw7xhUZo/iSF3LY/unfoD6jR8S20=; b=U3lv4I9OEgZZD6ajpvo7 oOuyRfQoU4Qq85X/me+i+CclgocRsxFTzvrHtZ+HpDpbWJVxFjAB2WtvEcIdxPiwZADzn2Zmatais 2T2w/ms8LcE4dO0cVmOiWKVX0TQRt/DpViQZ5lGl12EEX290D44sJylk0tbVDn1ffXY9Ttfkjg/LD MN16zCeHq7wpauXH/UdGjQGgDizcf8QDasVL6K+as6E48Z0NRCZI1w6KvUoVaLj+LI947hR0nCFrq KD8VoxtofifxC4WDn70FSkqSKW6mNFd4uNE1CkxMuAeyGWbYvkyAyrZIjkUDYpl1ZUfex4VoZa//d /M0xZSmV8SA1ew==; Date: Thu, 16 May 2024 22:54:01 +0300 Message-Id: <86le49h6sm.fsf@HIDDEN> From: Eli Zaretskii <eliz@HIDDEN> To: Mattias =?utf-8?Q?Engdeg=C3=A5rd?= <mattias.engdegard@HIDDEN> In-Reply-To: <E13B82E6-8A2F-4D1B-B0A0-8D251270685F@HIDDEN> (message from Mattias =?utf-8?Q?Engdeg=C3=A5rd?= on Thu, 16 May 2024 21:45:56 +0200) Subject: Re: bug#70988: (read FUNCTION) uses Latin-1 [PATCH] References: <37B5B5D0-9C0B-4E1C-9F3C-6CA647612E08@HIDDEN> <86seyhh9uv.fsf@HIDDEN> <E13B82E6-8A2F-4D1B-B0A0-8D251270685F@HIDDEN> MIME-version: 1.0 Content-type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit X-Spam-Score: -2.3 (--) X-Debbugs-Envelope-To: 70988 Cc: 70988 <at> debbugs.gnu.org, 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 (---) > From: Mattias Engdegård <mattias.engdegard@HIDDEN> > Date: Thu, 16 May 2024 21:45:56 +0200 > Cc: 70988 <at> debbugs.gnu.org, > monnier@HIDDEN > > > Is it an accident that the code does the same only _after_ the call to > > readbyte? > > Yes, I have no reason to believe otherwise. To me, it actually looks as done on purpose.
bug-gnu-emacs@HIDDEN:bug#70988; Package emacs.
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bug-gnu-emacs@HIDDEN:bug#70988; Package emacs.
Full text available.Received: (at 70988) by debbugs.gnu.org; 16 May 2024 18:48:07 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Thu May 16 14:48:07 2024 Received: from localhost ([127.0.0.1]:50351 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1s7g99-0002Jy-56 for submit <at> debbugs.gnu.org; Thu, 16 May 2024 14:48:07 -0400 Received: from eggs.gnu.org ([209.51.188.92]:41950) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <eliz@HIDDEN>) id 1s7g94-0002JR-Uw for 70988 <at> debbugs.gnu.org; Thu, 16 May 2024 14:48:05 -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 <eliz@HIDDEN>) id 1s7g8x-0005HX-4V; Thu, 16 May 2024 14:47:55 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=gnu.org; s=fencepost-gnu-org; h=MIME-version:References:Subject:In-Reply-To:To:From: Date; bh=WuSDusavepW5zeVFHFNG9WEzTnEyFCXmTpez/9Br28E=; b=jy9tcBcbSz1M3UajjfFL sZvySlfKhpp/4XB/v329PQtTHSUsMLGxZntAXhPdD49uYuClfHoQPNmaLOgIR2zEhlDhy2grPUh17 /T6Grw9uf/a4TeHEpHvqDkjyt5RfeFDeeb4LbhH+Bfq2Q3x2Y644Hl3aAaT4D7F3vV9+K57fvYo9P C1fiTklf3Sbm0ttuZHlA82YhcQUBozrCHDOih5+mjtrzs8sRVHrX+5GG5ff7/KJ1zORGP7zdw9rB1 ym9sIfX1Ih70ncxLxhY5zGwWtZxQWpENpwUcYBNikE2jS8UsKNV+/Vt8hjtoayjzG8qRWON2zrByM SLECUV//AWuX/g==; Date: Thu, 16 May 2024 21:47:52 +0300 Message-Id: <86seyhh9uv.fsf@HIDDEN> From: Eli Zaretskii <eliz@HIDDEN> To: Mattias =?utf-8?Q?Engdeg=C3=A5rd?= <mattias.engdegard@HIDDEN> In-Reply-To: <37B5B5D0-9C0B-4E1C-9F3C-6CA647612E08@HIDDEN> (message from Mattias =?utf-8?Q?Engdeg=C3=A5rd?= on Thu, 16 May 2024 20:13:18 +0200) Subject: Re: bug#70988: (read FUNCTION) uses Latin-1 [PATCH] References: <37B5B5D0-9C0B-4E1C-9F3C-6CA647612E08@HIDDEN> MIME-version: 1.0 Content-type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit X-Spam-Score: -2.3 (--) X-Debbugs-Envelope-To: 70988 Cc: 70988 <at> debbugs.gnu.org, 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 (---) > Cc: Stefan Monnier <monnier@HIDDEN> > From: Mattias Engdegård <mattias.engdegard@HIDDEN> > Date: Thu, 16 May 2024 20:13:18 +0200 > > When `read` is called with a function as stream argument, the return values of that function are often interpreted as Latin-1 characters with only the 8 low bits used. Example: > > (let* ((next '(?A #x12a nil)) > (f (lambda (&rest args) > (if args > (push (car args) next) > (pop next))))) > (read f)) > => A* ; expected: AĪ > > This is a result of `readchar` setting *multibyte to 0 on this code path. When is this situation relevant? How many uses of function-as-a-stream are there out there? In general, I wouldn't touch these rare cases with a 3-mile pole. The gain is generally very small (satisfaction from some abstract sense of correctness aside), while the risk to break some code is usually high. It is better to document this behavior and move on. > The fix is straightforward (attached). > > diff --git a/src/lread.c b/src/lread.c > index c92b2ede932..2626272c4e2 100644 > --- a/src/lread.c > +++ b/src/lread.c > @@ -422,6 +422,8 @@ readchar (Lisp_Object readcharfun, bool *multibyte) > goto read_multibyte; > } > > + if (multibyte) > + *multibyte = 1; > tem = call0 (readcharfun); Is it an accident that the code does the same only _after_ the call to readbyte?
bug-gnu-emacs@HIDDEN:bug#70988; Package emacs.
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--Apple-Mail=_2685EA9B-3ACD-4D1D-81B9-D9031379C60E
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When `read` is called with a function as stream argument, the return =
values of that function are often interpreted as Latin-1 characters with =
only the 8 low bits used. Example:
(let* ((next '(?A #x12a nil))
(f (lambda (&rest args)
(if args
(push (car args) next)
(pop next)))))
(read f))
=3D> A* ; expected: A=C4=AA
This is a result of `readchar` setting *multibyte to 0 on this code =
path.
The reader is not very consistent: inside string and character literals, =
the code seems to work as expected.
The fix is straightforward (attached).
--Apple-Mail=_2685EA9B-3ACD-4D1D-81B9-D9031379C60E
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filename=read-from-function.diff
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diff=20--git=20a/src/lread.c=20b/src/lread.c=0Aindex=20=
c92b2ede932..2626272c4e2=20100644=0A---=20a/src/lread.c=0A+++=20=
b/src/lread.c=0A@@=20-422,6=20+422,8=20@@=20readchar=20(Lisp_Object=20=
readcharfun,=20bool=20*multibyte)=0A=20=20=20=20=20=20=20goto=20=
read_multibyte;=0A=20=20=20=20=20}=0A=20=0A+=20=20if=20(multibyte)=0A+=20=
=20=20=20*multibyte=20=3D=201;=0A=20=20=20tem=20=3D=20call0=20=
(readcharfun);=0A=20=0A=20=20=20if=20(NILP=20(tem))=0Adiff=20--git=20=
a/test/src/lread-tests.el=20b/test/src/lread-tests.el=0Aindex=20=
cc17f7eb3fa..41c9256a9bf=20100644=0A---=20a/test/src/lread-tests.el=0A=
+++=20b/test/src/lread-tests.el=0A@@=20-387,4=20+387,19=20@@=20=
lread-skip-to-eof=0A=20=20=20=20=20(goto-char=20(point-min))=0A=20=20=20=20=
=20(should-error=20(read=20(current-buffer))=20:type=20'end-of-file)))=0A=
=20=0A+(ert-deftest=20lread-from-function=20()=0A+=20=20;;=20Test=20=
reading=20from=20a=20stream=20defined=20by=20a=20function.=0A+=20=20(let=20=
((make-reader=20(lambda=20(chars)=0A+=20=20=20=20=20=20=20=20=20=20=20=20=
=20=20=20=20=20=20=20=20=20=20=20(lambda=20(&rest=20args)=0A+=20=20=20=20=
=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20(if=20=
args=0A+=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=
=20=20=20=20=20=20=20(push=20(car=20args)=20chars)=0A+=20=20=20=20=20=20=20=
=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20(pop=20=
chars))))))=0A+=20=20=20=20(dolist=20(seq=20'((?A=20?B)=20(?E=20?=C3=A4=20=
?=C3=BF)=20(?A=20?=CE=A9)=20(?*=20?=E2=98=83)=20(?a=20#o303=20#o245=20=
?b)))=0A+=20=20=20=20=20=20(let=20((str=20(apply=20#'string=20seq)))=0A+=20=
=20=20=20=20=20=20=20(should=20(eq=20(read=20(funcall=20make-reader=20=
seq))=20(intern=20str)))=0A+=20=20=20=20=20=20=20=20(let=20((quoted-seq=20=
`(?\"=20,@seq=20?\")))=0A+=20=20=20=20=20=20=20=20=20=20(should=20(equal=20=
(read=20(funcall=20make-reader=20quoted-seq))=20str)))))=0A+=20=20=20=20=
(dolist=20(c=20'(?A=20?=C3=A4=20?=C3=BF=20?=CE=A9=20?=E2=98=83))=0A+=20=20=
=20=20=20=20(should=20(eq=20(read=20(funcall=20make-reader=20`(??=20=
,c)))=20c)))))=0A+=0A=20;;;=20lread-tests.el=20ends=20here=0A=
--Apple-Mail=_2685EA9B-3ACD-4D1D-81B9-D9031379C60E--
Mattias Engdegård <mattias.engdegard@HIDDEN>:bug-gnu-emacs@HIDDEN.
Full text available.bug-gnu-emacs@HIDDEN:bug#70988; Package emacs.
Full text available.
GNU bug tracking system
Copyright (C) 1999 Darren O. Benham,
1997 nCipher Corporation Ltd,
1994-97 Ian Jackson.