*** This bug is a duplicate of bug 1848829 ***
https://bugs.launchpad.net/bugs/1848829
This bug affects all ubuntu version since I think 18.04
The problem is that upgrader tries to use UbuntuDistroInfo object (child of
DistroInfo) in unsupported way. I believe it is upgrader issue.
At least one class of the upgrader, namely: DistUpgradeQuirks tries to call
version field and get_all method of DistroInfo object and there are neither of
them there.
The reason I think it's upgrader issue is this code I found in above
class, this is the source of te installer failure.
def _get_from_and_to_version(self):
di = distro_info.UbuntuDistroInfo()
try:
self._from_version = \
di.version('%s' % self.controller.fromDist).split()[0]
self._to_version = \
di.version('%s' % self.controller.toDist).split()[0]
# Ubuntu 18.04's python3-distro-info does not have version
except AttributeError:
self._from_version = next(
(r.version for r in di.get_all("object")
if r.series == self.controller.fromDist),
self.controller.fromDist).split()[0]
self._to_version = next(
(r.version for r in di.get_all("object")
if r.series == self.controller.toDist),
self.controller.toDist).split()[0]
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https://bugs.launchpad.net/bugs/1874250
Title:
do-release-upgrade fails 19.10->20.04 AttributeError:
'UbuntuDistroInfo' object has no attribute 'version'
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