GNU bug report logs - #29777
Newer .deb files can't be opened

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Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Dan Jacobson <jidanni <at> jidanni.org>
To: bug-gnu-emacs <at> gnu.org
Subject: Newer .deb files can't be opened
Date: Wed, 20 Dec 2017 11:42:19 +0800

Opening newer .deb files shows

        no entry control.tar.gz in archive

        gzip: stdin: unexpected end of file

I used v in dired on them.

Ones from a year ago are unaffected.

Message #8 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Eli Zaretskii <eliz <at> gnu.org>
To: bug-gnu-emacs <at> gnu.org, Dan Jacobson <jidanni <at> jidanni.org>,
 29777 <at> debbugs.gnu.org
Subject: Re: bug#29777: Newer .deb files can't be opened
Date: Wed, 20 Dec 2017 06:58:04 +0200

On December 20, 2017 5:42:19 AM GMT+02:00, Dan Jacobson <jidanni <at> jidanni.org> wrote:
> Opening newer .deb files shows
> 
>         no entry control.tar.gz in archive
> 
>         gzip: stdin: unexpected end of file
> 
> I used v in dired on them.
> 
> Ones from a year ago are unaffected.

Examples of such files or URLs to get them would be helpful.

Thanks.

Message #14 received at submit <at> debbugs.gnu.org (full text, mbox):

From: 積丹尼 Dan Jacobson <jidanni <at> jidanni.org>
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: bug-gnu-emacs <at> gnu.org, 29777 <at> debbugs.gnu.org
Subject: Re: bug#29777: Newer .deb files can't be opened
Date: Wed, 20 Dec 2017 13:41:27 +0800

>>>>> "EZ" == Eli Zaretskii <eliz <at> gnu.org> writes:
EZ> Examples of such files or URLs to get them would be helpful.

GOOD http://free.nchc.org.tw/debian/pool/main/g/getmail4/getmail4_4.46.0-1+deb8u1_all.deb
BAD  http://free.nchc.org.tw/debian/pool/main/g/getmail4/getmail4_4.53.0-1+deb9u1_all.deb

I think it has to do with a change from .gz to .xz:
$ w3m -dump http://free.nchc.org.tw/debian/pool/main/g/getmail4 | grep -P \\d.debian.tar
[ ]         getmail4_4.46.0-1+deb8u1.debian.tar.xz  2015-09-03 7.5K
[ ]         getmail4_4.46.0-1.debian.tar.xz         2014-04-22 7.0K
[ ]         getmail4_4.46.0-1~deb7u1.debian.tar.gz  2014-12-08 8.0K
[ ]         getmail4_4.53.0-1+deb9u1.debian.tar.xz  2017-11-03 7.5K
[ ]         getmail4_4.53.0-2.debian.tar.xz         2017-10-07 7.5K

In the minibuffer: "File mode specification error: (error Malformed Tar header)"

By the way, even trying to view ( v runs the command dired-view-file )
causes the BAD file buffers to get altered in memory:
When trying to exit emacs, one will be asked
Buffer getmail4_4.53.0-1+deb9u1_all.deb-INFO modified; kill anyway? (yes or no)

Message #20 received at 29777 <at> debbugs.gnu.org (full text, mbox):

From: Glenn Morris <rgm <at> gnu.org>
To: Dan Jacobson <jidanni <at> jidanni.org>
Cc: 29777 <at> debbugs.gnu.org
Subject: Re: bug#29777: Newer .deb files can't be opened
Date: Wed, 20 Dec 2017 01:22:09 -0500

Before you make a bug report:

1) search
2) try with emacs -Q

This is https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=878868,
which is not a bug in Emacs.

Message #29 received at 29777 <at> debbugs.gnu.org (full text, mbox):

From: Michael Albinus <michael.albinus <at> gmx.de>
To: 積丹尼 Dan Jacobson <jidanni <at> jidanni.org>
Cc: Eli Zaretskii <eliz <at> gnu.org>, 29777 <at> debbugs.gnu.org
Subject: Re: bug#29777: Newer .deb files can't be opened
Date: Wed, 20 Dec 2017 09:29:46 +0100

積丹尼 Dan Jacobson <jidanni <at> jidanni.org> writes:

Hi Dan,

> GOOD
> http://free.nchc.org.tw/debian/pool/main/g/getmail4/getmail4_4.46.0-1+deb8u1_all.deb
> BAD
> http://free.nchc.org.tw/debian/pool/main/g/getmail4/getmail4_4.53.0-1+deb9u1_all.deb

If you are running a GNU/Linux system, you could try the new Tramp file
archive feature. Try with a recent Emacs from master

M-x load-library tramp
M-x url-handler-mode
C-x C-f http://free.nchc.org.tw/debian/pool/main/g/getmail4/getmail4_4.53.0-1+deb9u1_all.deb/

Note the trailing slash. You could even open

C-x C-f http://free.nchc.org.tw/debian/pool/main/g/getmail4/getmail4_4.53.0-1+deb9u1_all.deb/control.tar.xz/control

Best regards, Michael.

Message #32 received at 29777 <at> debbugs.gnu.org (full text, mbox):

From: 積丹尼 Dan Jacobson <jidanni <at> jidanni.org>
To: Michael Albinus <michael.albinus <at> gmx.de>
Cc: Eli Zaretskii <eliz <at> gnu.org>, 29777 <at> debbugs.gnu.org
Subject: Re: bug#29777: Newer .deb files can't be opened
Date: Thu, 21 Dec 2017 10:09:27 +0800

>>>>> "MA" == Michael Albinus <michael.albinus <at> gmx.de> writes:
MA> M-x load-library tramp
MA> M-x url-handler-mode
MA> C-x C-f http://free.nchc.org.tw/debian/pool/main/g/getmail4/getmail4_4.53.0-1+deb9u1_all.deb/
Hmmm. I'll try that some day. By the way, I wonder what FFAP users
should now use...

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