This bug was fixed in the package unattended-upgrades -
1.1ubuntu1.18.04.1
---------------
unattended-upgrades (1.1ubuntu1.18.04.1) bionic; urgency=medium
[ Michael Vogt ]
* unattended-upgrades: fix Unlocked context manager. (LP: #1602536)
The Unlocked context manager did correctly unlock but did not
reacquire the lock which means that in minimal-upgrade step
mode it is possible to run apt code without a lock. If something
else (like landscape, apt, synaptic, packagekit) locks the cache
in the meantime this will work and u-u will get dpkg errors
because dpkg will not be able to perform its operations. It is
less of an issue in non-minimal mode, but even then the auto-remove
step may fail in this way.
[ Balint Reczey ]
* Fix adjusting candidates (LP: #1775292)
* Relock apt lock before reopening the cache (LP: #1602536)
* Fix crashing while adjusting candidates and save candidates to adjust only
in first sweep run, not emptying the set later
(Closes: #901258) (LP: #1775307)
-- Balint Reczey <rbal...@ubuntu.com> Wed, 06 Jun 2018 16:30:55 -0700
** Changed in: unattended-upgrades (Ubuntu Bionic)
Status: Fix Committed => Fix Released
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https://bugs.launchpad.net/bugs/1775307
Title:
Unattended-upgrades crashes in adjusting candidates in 1.2ubuntu1
version
Status in unattended-upgrades package in Ubuntu:
Fix Released
Status in unattended-upgrades source package in Bionic:
Fix Released
Bug description:
[Impact]
* Unattended-upgrades fails to install updates when adjusting
candidates is needed.
[Test Case]
Note that only 1.2ubuntu1 is affected. Earlier releases either did not
crash or did not adjust candidates due to LP: #1775292. To reproduce
the crash Cosmic's u-u 1.2ubuntu1 needs to be installed.
* Run sudo apt update && sudo unattended-upgrade --dry-run --verbose --debug
* Observe no line with "adjusting candidate version: " or a crash with buggy
u-u versions
...
adjusting candidate version: zfs-initramfs=0.7.5-1ubuntu15
adjusting candidate version: zfs-test=0.7.5-1ubuntu15
adjusting candidate version: zfs-zed=0.7.5-1ubuntu15
adjusting candidate version: zfsutils-linux=0.7.5-1ubuntu15
Traceback (most recent call last):
File "/usr/bin/unattended-upgrade", line 1928, in <module>
sys.exit(main(options))
File "/usr/bin/unattended-upgrade", line 1554, in main
allowed_origins=allowed_origins)
File "/usr/bin/unattended-upgrade", line 122, in __init__
apt.Cache.__init__(self, rootdir=rootdir)
File "/usr/lib/python3/dist-packages/apt/cache.py", line 130, in __init__
self.open(progress)
File "/usr/bin/unattended-upgrade", line 152, in open
self.adjust_candidates()
File "/usr/bin/unattended-upgrade", line 161, in adjust_candidates
for pkgname, candidate in self._get_candidates_to_adjust():
ValueError: too many values to unpack (expected 2) * Install fixed u-u version
* Run sudo unattended-upgrade --dry-run --verbose --debug
* Observe lines "adjusting candidate version: " and no crash
[Regression Potential]
* Unattended-upgrade may crash when adjusting candidates preventing
upgrades to be installed
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