The problem messages are now more informative:
# the most likely problem is the 3rd party pkgs so don't address
# foreignPkgs and devRelease being True
details = _("An unresolvable problem occurred while "
"calculating the upgrade.\n\n ")
if self.config.get("Options", "foreignPkgs") == "True":
details += _("This was likely caused by:\n"
" * Unofficial software packages not provided by
Ubuntu\n"
"Please use the tool 'ppa-purge' from the
ppa-purge \n"
"package to remove software from a Launchpad PPA
and \n"
"try the upgrade again.\n"
"\n")
elif self.config.get("Options", "foreignPkgs") == "False" and \
self.config.get("Options", "devRelease") == "True":
details += _("This was caused by:\n"
" * Upgrading to a pre-release version of
Ubuntu\n"
"This is most likely a transient problem, \n"
"please try again later.\n")
# we never have partialUpgrades (including removes) on a stable
system
# with only ubuntu sources so we do not recommend reporting a bug
if partialUpgrade:
details += _("This is most likely a transient problem, "
"please try again later.")
else:
details += _("If none of this applies, then please report this
bug using "
"the command 'ubuntu-bug
ubuntu-release-upgrader-core' in a terminal. ")
details += _("If you want to investigate this yourself the log
files in "
"'/var/log/dist-upgrade' will contain details
about the upgrade. "
"Specifically, look at 'main.log' and 'apt.log'.")
# make the error text available again on stdout for the
# text frontend
self._stopAptResolverLog()
view.error(_("Could not calculate the upgrade"), details)
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https://bugs.launchpad.net/bugs/934371
Title:
Unresolvable problem message does not help users and results in less
useful bug reports
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https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/934371/+subscriptions
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