This bug was fixed in the package unattended-upgrades - 1.12ubuntu1
---------------
unattended-upgrades (1.12ubuntu1) eoan; urgency=medium
* Don't crash collecting transitive dependencies when package has no candidate
(LP: #1825886)
* Use mark_install_adjusted() in rewind_cache()
The original cache had packages marked with adjustments thus rewinding
should also do adjustments to reach the same state.
Also not using mark_install_adjusted() crashes when apt raises error on
held packages. (LP: #1826157)
-- Balint Reczey <rbal...@ubuntu.com> Fri, 26 Apr 2019 14:33:08 +0200
** Changed in: unattended-upgrades (Ubuntu)
Status: New => Fix Released
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https://bugs.launchpad.net/bugs/1826157
Title:
unattended-upgrades: rewind_cache() may crash due to not adjusting
package candidates
Status in unattended-upgrades package in Ubuntu:
Fix Released
Bug description:
[Impact]
* Unattended-upgrades may crash when rewinding cache due to not adjusting
package candidates before marking them to upgrade/install.
* The fix is using adjusted marking that in effect rewinds the cache to the
right, adjusted state.
[Test Case]
* test/test_rewind.py is updated to verify that rewinding included
adjustments and it is ran during the build.
* Also watch the error not happening anymore.
[Regression Potential]
* The fix is very small and is not likely to cause any regression.
[Original Bug Text]
The Ubuntu Error Tracker has been receiving reports about a problem regarding
unattended-upgrades. This problem was most recently seen with package version
1.10ubuntu5, the problem page at
https://errors.ubuntu.com/problem/6f57d938f3aa56b3995d5bccf4637d65734d78e4
contains more details, including versions of packages affected, stacktrace or
traceback, and individual crash reports.
If you do not have access to the Ubuntu Error Tracker and are a software
developer, you can request it at http://forms.canonical.com/reports/.
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/unattended-upgrades/+bug/1826157/+subscriptions
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