Comment 3 for bug 1102593

I don't think it can -- with the current Raring or Quantal branch. Setting e = None on that line should do the trick, and that was added by cjwatson in revno 2.1.7 for 1:0.181. If they've got:

Package: ubuntu-release-upgrader-core 1:0.192.4

I can't see how they'd be hitting this. OTOH, note that the reference to 'e' on the current trunk branch is actually at line 1062, so it certainly seems like they are using an out of date version.