GNU bug report logs - #66351
Python build is not reproducible

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From: help-debbugs <at> gnu.org (GNU bug Tracking System)
To: Tomas Volf <~@wolfsden.cz>
Subject: bug#66351: closed (Re: Python build is not reproducible)
Date: Fri, 12 Jan 2024 00:44:02 +0000

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Your bug report

#66351: Python build is not reproducible

which was filed against the guix package, has been closed.

The explanation is attached below, along with your original report.
If you require more details, please reply to 66351 <at> debbugs.gnu.org.

-- 
66351: https://debbugs.gnu.org/cgi/bugreport.cgi?bug=66351
GNU Bug Tracking System
Contact help-debbugs <at> gnu.org with problems

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From: Tomas Volf <~@wolfsden.cz>
To: 66351-close <at> debbugs.gnu.org
Subject: Re: Python build is not reproducible
Date: Fri, 12 Jan 2024 01:43:24 +0100

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Superseded by #68394.

-- 
There are only two hard things in Computer Science:
cache invalidation, naming things and off-by-one errors.

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From: wolf <wolf <at> wolfsden.cz>
To: bug-guix <at> gnu.org
Subject: Python build is not reproducible
Date: Wed, 4 Oct 2023 23:48:30 +0200

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Hi,

python package currently does not build in a reproducible way:

    /gnu/store/dy3xh053ahkhrp2jamggq8cpsyvp8mg0-python-3.10.7 contents differ:
      local hash: 0iw988a0573bc7ag1c3da23cvcl0xp166l1zazi31i9cf1faprmh
      https://ci.guix.gnu.org/nar/lzip/dy3xh053ahkhrp2jamggq8cpsyvp8mg0-python-3.10.7: 0iw988a0573bc7ag1c3da23cvcl0xp166l1zazi31i9cf1faprmh
      https://bordeaux.guix.gnu.org/nar/lzip/dy3xh053ahkhrp2jamggq8cpsyvp8mg0-python-3.10.7: 08g7gnv6852xwjw21w2nkd662xh2h8pvcryczsxcppdqaskmxy43
      differing files:
        /lib/python3.10/multiprocessing/__pycache__/connection.cpython-310.opt-1.pyc
        /lib/python3.10/multiprocessing/__pycache__/connection.cpython-310.opt-2.pyc
        /lib/python3.10/multiprocessing/__pycache__/connection.cpython-310.pyc
        /lib/python3.10/site-packages/pip/_vendor/rich/__pycache__/_windows.cpython-310.opt-1.pyc
        /lib/python3.10/site-packages/pip/_vendor/rich/__pycache__/_windows.cpython-310.opt-2.pyc
        /lib/python3.10/site-packages/pip/_vendor/rich/__pycache__/_windows.cpython-310.pyc
        /lib/python3.10/test/support/__pycache__/os_helper.cpython-310.opt-1.pyc
        /lib/python3.10/test/support/__pycache__/os_helper.cpython-310.opt-2.pyc
        /lib/python3.10/test/support/__pycache__/os_helper.cpython-310.pyc
    
    1 store items were analyzed:
      - 0 (0.0%) were identical
      - 1 (100.0%) differed
      - 0 (0.0%) were inconclusive

It however *is* reproducible on a single machine, --rounds=30 finished
successfully.  Possible cause seems to be described in this opensuse issue:

    https://bugzilla.opensuse.org/show_bug.cgi?id=1049186

The patch linked seems fairly simple:

    https://build.opensuse.org/request/show/687278#revision_details_6

As far as I can tell, we currently do not carry patch like this and in 3.10.7 it
is not present upstream.

Have a nice day,
W.

-- 
There are only two hard things in Computer Science:
cache invalidation, naming things and off-by-one errors.

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