All right, let's call this fixed by update-manager 1:0.156.12 then:
[ Michael Vogt ]
* UpdateManager/UpdateManager.py:
- disconnect model and clear store before rebuilding the cache,
thanks to Colin Watson
We can reopen if more duplicates start showing up.
Based on your comments
Thanks for your investigation Colin! It looks like the order of clear(),
cache.open() was wrong and the clear might have caused calls to the old
no longer valid cache. This should be fixed in trunk now, the order got
updated and the store removed from the view before the clear().
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python-apt's documentation seems to indicate fairly clearly that one
must create a new cache object after it's been externally modified,
which makes some sense given that it's mmaped. A plausible source of
trouble would be cached package objects that point into the old cache.
The traceback
Michael: I'm a little perplexed here, because it looks like update-
manager already attempts to do that (it calls self.fillstore which calls
self.initCache which calls cache.open and cache._initDepCache). Is it
not refreshing the cache hard enough or something?
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Sorry for not being more helpful:
mvo hm, I have a vague idea what might be causing this, but it
requires some serious effort to look deeper, one simple workaround would
be to always refresh the cache when software-properties was run and
returns a exit-state that indicates that something changes
Michael - looking at all the duplicates of this bug report a couple of
them make reference to using settings in update-manager to change
servers and then encountering the crash.
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** Tags added: rls-p-tracking
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https://bugs.launchpad.net/bugs/938116
Title:
update-manager crashed with SIGSEGV in DescriptionList()
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@Martin Mrazik (mrazik): when you say you get it 2/5 times, could you
please add the exact steps to reproduce?
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https://bugs.launchpad.net/bugs/938116
Title:
update-manager crashed
Hi Michael,
I had this bug when I installed Skype directly from their website and
ran the deb file. When I ran the .deb file, the Ubuntu Software Centre
would open, I'd hit install and the Software Centre would crash.
However! Skype did install, but I could not update or install anything
else
** Tags added: rls-mgr-p-tracking
** Also affects: apt (Ubuntu Precise)
Importance: High
Assignee: Michael Vogt (mvo)
Status: Confirmed
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** Changed in: apt (Ubuntu)
Importance: Medium = High
** Changed in: apt (Ubuntu)
Assignee: (unassigned) = Michael Vogt (mvo)
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Title:
Status changed to 'Confirmed' because the bug affects multiple users.
** Changed in: apt (Ubuntu)
Status: New = Confirmed
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Title:
Marking back to new due to package reassignment.
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** Changed in: apt (Ubuntu)
Status: Incomplete = New
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** Tags added: bugpattern-needed
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https://bugs.launchpad.net/bugs/938116
Title:
update-manager crashed with SIGSEGV in DescriptionList()
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** Visibility changed to: Public
** Package changed: update-manager (Ubuntu) = apt (Ubuntu)
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Title:
update-manager crashed with SIGSEGV in
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