Debian Bug report logs - #857892
fontconfig: please make the cache files reproducible

Toggle useless messages

Message #5 received at submit@bugs.debian.org (full text, mbox, reply):

From: Chris Lamb <lamby@debian.org>

To: submit@bugs.debian.org

Subject: fontconfig: please make the cache files reproducible

Date: Thu, 16 Mar 2017 07:44:46 +0000

[Message part 1 (text/plain, inline)]

Source: fontconfig
Version: 2.11.0-6.7
Severity: wishlist
Tags: patch
User: reproducible-builds@lists.alioth.debian.org
Usertags: randomness
X-Debbugs-Cc: reproducible-bugs@lists.alioth.debian.org

Hi,

Whilst working on the Reproducible Builds [0] we noticed that the fc-cache
command generates cache files in with non-deterministic contents.

This is problematic for us as bootstrapping a new Debian system will result
in different contents under /var/cache/fontconfig and thus the generated
system is not reproducible. In Tails[1] we are working around this by simply
deleting the contents of this directory [2] but this probably isn't a good
idea.

The cause is due to fc-cache writing unitialised memory during scanning of 
the directory index.

Patch attached.


 [0] https://reproducible-builds.org/
 [1] https://tails.boum.org/
 [2] https://git-tails.immerda.ch/tails/tree/config/chroot_local-hooks/99-zzzzzz_reproducible-builds-post-processing?h=feature/5630-deterministic-builds#n28


Regards,

-- 
      ,''`.
     : :'  :     Chris Lamb
     `. `'`      lamby@debian.org / chris-lamb.co.uk
       `-

[fontconfig.diff.txt (text/plain, attachment)]

Message #10 received at 857892@bugs.debian.org (full text, mbox, reply):

From: Chris Lamb <lamby@debian.org>

To: 857892@bugs.debian.org

Subject: Re: fontconfig: please make the cache files reproducible

Date: Thu, 16 Mar 2017 07:57:04 +0000

tags 857892 + fixed-upstream
thanks

Looks like this was inadvertently fixed upstream:

  https://cgit.freedesktop.org/fontconfig/commit/?id=7a6622f25cdfab5ab775324bef1833b67109801b


Regards,

-- 
      ,''`.
     : :'  :     Chris Lamb
     `. `'`      lamby@debian.org / chris-lamb.co.uk
       `-

Message #21 received at 857892-submitter@bugs.debian.org (full text, mbox, reply):

From: Laurent Bigonville <bigon@debian.org>

To: control@bugs.debian.org

Cc: 857892-submitter@bugs.debian.org

Subject: closing 857892

Date: Tue, 28 Mar 2017 18:24:19 +0200

close 857892 2.12.1-0.1
thanks

Hi,

I see that the upstream patch has been commited in 2013, that would mean it's
now fixed in experimental.

Closing the bug then

Cheers,

Laurent Bigonville

Send a report that this bug log contains spam.