GNU bug report logs - #45676
Store references inside compressed data

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From: Miguel Ángel Arruga Vivas <rosen644835 <at> gmail.com>
To: Ludovic Courtès <ludo <at> gnu.org>
Cc: 45676 <at> debbugs.gnu.org, Leo Famulari <leo <at> famulari.name>
Subject: bug#45676: Store references inside compressed data
Date: Wed, 06 Jan 2021 17:57:43 +0100

Hi Ludo and Leo,

Ludovic Courtès <ludo <at> gnu.org> writes:

> Hi,
>
> Leo Famulari <leo <at> famulari.name> skribis:
>
>> On Tue, Jan 05, 2021 at 03:36:07PM +0100, Miguel Ángel Arruga Vivas wrote:
>>> There are several binary formats that allow compression of the
>>> executable image, or some of its data, which is decompress at runtime:
>>> 
>>>   - Kernel images.
>>>   - Compressed libraries: e.g. Smalltalk modules.
>>>   - Compressed executable or data files: e.g. library.el.gz.
>>> 
>>> These aren't taken into account by the grafting process, which may lead
>>> to issues when store paths are located inside that kind of files.
>>
>> If you have specific instances of this type of bug, please report them.
>
> Agreed.  The general issue is “well known” as we say, but what I think
> we need to do is look for specific instances and address them.

It can be tagged it notabug if you consider so.  I've tagged it as
wishlist (I should have been done it before) for that reason (it's "well
known"), but I haven't found any specific instance yet.  OTOH, I think
it might be closely related to #33848, as the solution for both issues
could be solved by the extension on the dumpPath code path---or the
Scheme implementation equivalent, as pointed there.

Happy hacking!
Miguel

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