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Bug#901248: marked as done (Britney crashes in _compute_groups when attempting migration)

Your message dated Mon, 25 Feb 2019 20:31:00 +0000
with message-id <debf44d5-dbfe-5a76-a0a1-e12a058a2ebe@thykier.net>
and subject line Re: Britney crashes in _compute_groups when attempting migration
has caused the Debian Bug report #901248,
regarding Britney crashes in _compute_groups when attempting migration
to be marked as done.

This means that you claim that the problem has been dealt with.
If this is not the case it is now your responsibility to reopen the
Bug report if necessary, and/or fix the problem forthwith.

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-- 
901248: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=901248
Debian Bug Tracking System
Contact owner@bugs.debian.org with problems
--- Begin Message --- 
Package: release.debian.org
Severity: normal
User: release.debian.org@packages.debian.org
Usertags: britney

Hi!
This is a slightly different form of the issue we recently discussed
on IRC, but it likely has the same cause: arch:all package being
available in different versions in arm64 vs amd64 for some reason.

Britney crashes with the following error:
```
I: [2018-06-06T19:54:54+0000] -   most: (92) .. kicad-templates
kimagemapeditor -python-msrestazure kicad-footprints kicad-packages3d
kopano-webapp libgitlab-api-v4-perl cross-toolchain-base-ports
emacs-jabber pxz fonts-sawarabi-gothic ruby-sidekiq-limit-fetch
golang-github-go-ini-ini apache-directory-server
python-certbot-dns-digitalocean stenographer t4kcommon libsdl1.2
emacs-ctable refpolicy
I: [2018-06-06T19:54:54+0000] - trying: r-cran-bayesplot
I: [2018-06-06T19:54:54+0000] - skipped: r-cran-bayesplot (41, 0, 10)
I: [2018-06-06T19:54:54+0000] -     got: 17398+0: a-14680:a-2718
I: [2018-06-06T19:54:54+0000] -     * amd64: r-cran-bayesplot
I: [2018-06-06T19:54:54+0000] - trying: neutron
I: [2018-06-06T19:54:54+0000] - skipped: neutron (41, 1, 9)
I: [2018-06-06T19:54:54+0000] -     got: 17398+0: a-14680:a-2718
I: [2018-06-06T19:54:54+0000] -     * amd64: neutron-plugin-openvswitch-agent
I: [2018-06-06T19:54:54+0000] - trying: selinux-dbus selinux-python

Traceback (most recent call last):
  File "/srv/laniakea/dist/britney2/britney.py", line 2857, in <module>
    Britney().main()
  File "/srv/laniakea/dist/britney2/britney.py", line 2846, in main
    self.upgrade_testing()
  File "/srv/laniakea/dist/britney2/britney.py", line 2493, in upgrade_testing
    self.do_all()
  File "/srv/laniakea/dist/britney2/britney.py", line 2359, in do_all
    (nuninst_end, extra) = self.iter_packages(upgrade_me, selected,
nuninst=nuninst_end, lundo=lundo)
  File "/srv/laniakea/dist/britney2/britney.py", line 2250, in iter_packages
    accepted, nuninst_after, comp_undo, failed_arch =
self.try_migration(comp, nuninst_last_accepted, lundo)
  File "/srv/laniakea/dist/britney2/britney.py", line 2149, in try_migration
    allow_smooth_updates=False)
  File "/srv/laniakea/dist/britney2/britney.py", line 1855, in _compute_groups
    if binaries_t[parch][0][binary].source != source_name:
KeyError: 'policycoreutils-gui'
```

Given this configuration file (slightly reduced and simplified here):
```
NONINST_STATUS      = output/target/non-installable-status
EXCUSES_OUTPUT      = output/target/excuses.html
EXCUSES_YAML_OUTPUT = output/target/excuses.yaml
UPGRADE_OUTPUT      = output/target/output.txt
HEIDI_OUTPUT        = output/target/HeidiResult
STATIC_INPUT_DIR = input/
HINTSDIR         = input/hints
STATE_DIR        = state/
HINTS_LANIAKEA   = ALL
SMOOTH_UPDATES = libs oldlibs
IGNORE_CRUFT   = 1
UNSTABLE = /path/to/landing
TESTING  = /path/to/purple
COMPONENTS = main
ARCHITECTURES = amd64 arm64
NOBREAKALL_ARCHES = amd64
MINDAYS_LOW = 0
MINDAYS_EMERGENCY = 0
MINDAYS_CRITICAL = 0
MINDAYS_HIGH = 0
MINDAYS_MEDIUM = 0
DEFAULT_URGENCY   = medium
OUTOFSYNC_ARCHES  = amd64 arm64
BREAK_ARCHES      =
NEW_ARCHES        =
```

And using these Packages/Sources as input:
https://people.debian.org/~mak/share/pureos-mindist-britney-crash.zip
(file is a bit bigger than what could be uploaded here).

Britney2 is at commit `d11152b36601bf81c2ab0f24a476654bb1e59eff` when
showing this crash.
A difference to the previous crash (at the same position) that did
show up first is that this time, arm64 is not in BREAK_ARCHES.

If there is any further information you need or anything I can help
with, please let me know!
Thank you!

--- End Message ---
--- Begin Message --- 
On Sun, 10 Jun 2018 16:55:00 +0200 Matthias Klumpp <mak@debian.org> wrote:
> Package: release.debian.org
> Severity: normal
> User: release.debian.org@packages.debian.org
> Usertags: britney
> 
> Hi!
> This is a slightly different form of the issue we recently discussed
> on IRC, but it likely has the same cause: arch:all package being
> available in different versions in arm64 vs amd64 for some reason.
> 
> Britney crashes with the following error:
> [...]>
> Britney2 is at commit `d11152b36601bf81c2ab0f24a476654bb1e59eff` when
> showing this crash.
> A difference to the previous crash (at the same position) that did
> show up first is that this time, arm64 is not in BREAK_ARCHES.
> 
> If there is any further information you need or anything I can help
> with, please let me know!
> Thank you!

Hi,

AFAIR, we never managed to reproduce this crash.  However, thanks to
Ivo's efforts, we have managed to find and solve a number of crashes
caused by britney corrupting its own data structures.  Furthermore, the
current master branch includes consistency checking to catch future ones
faster and easier.

As such, I am taking the liberty of marking this as fixed now.  If you
can reproduce any crashes on the current master, please file a new bug
(and consider using the consistency checking at its full setting).

Thanks,
~Niels

--- End Message ---
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