Red Hat Bugzilla – Bug 221943
anaconda bails out with "TypeError: list objects are unhashable" on an attempt to upgrade
Last modified: 2007-11-30 17:11:52 EST
Description of problem:
I tried to update to FC6 a small "internal" server which so far
was happy with RHL 7.2. All attempts ended up with an error like
the one quoted in summary. This was happening while anaconda was
trying to inventory packages to install.
Full anacdump.txt dumped by anaconda attached.
Version-Release number of selected component (if applicable):
anaconda like provided on FC6 installation images
Created attachment 145137 [details]
crash information as dumped by anaconda
Were you trying to upgrade a RHL 7.2 system to FC-6? If so, that's not
supported. We can only guarantee previous Fedora releases upgradeable to the
current one. So, FC-5 to FC-6 works. RHL 7.2 to FC-6 definitely won't work.
> Were you trying to upgrade a RHL 7.2 system to FC-6?
Yes, like I said.
> If so, that's not supported.
Supported or not supported but Python errors from anaconda seems
like not something what should happen.
> We can only guarantee previous Fedora releases upgradeable
> to the current one.
This is _far_ too little in the real life. Besides in the past
there were really no problems with skipping few releases.
Granted, what I tried was somewhat extreme but in any case
one would think that anaconda runs in an evironment of an
installation image so why it should care about a status of
You're right, most people don't install each new release. Some effort is made
to see if upgrades work from 2 releases back, but there are so many other
factors that go in to it. Sometimes it's impossible to do a smooth upgrade.
Anaconda cares about the target system because it needs to know the possible set
of packages there and account for obsoletes and entirely new packages. That
happens a lot.
We can probably do a better job of telling the user that upgrading their very
old installation to this release won't work, rather than dumping the traceback.
Closing this as WONTFIX because we cannot keep knowledge of past releases in
anaconda forever. FC releases change a lot from release to release and that's
hard enough to guarantee upgrades.