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Trying to upgrade my F24 laptop to F25, I get this *really helpful* output: [root@xps13 adamw]# dnf system-upgrade download --releasever=25 --best --allowerasing Private side repo 100 kB/s | 257 B 00:00 Failed to synchronize cache for repo 'rpmfusion-free-updates', disabling. Failed to synchronize cache for repo 'rpmfusion-nonfree-updates', disabling. Error: package ghc-nats-0.2-3.fc24.x86_64 requires libHSarray-0.5.0.0-ghc7.8.4.so()(64bit), but none of the providers can be installed. package rpm-python3-4.13.0-1.fc24.x86_64 requires rpm = 4.13.0-1.fc24, but none of the providers can be installed. package rpm-python-4.13.0-1.fc24.x86_64 requires rpm = 4.13.0-1.fc24, but none of the providers can be installed This tells me exactly nothing useful, because the real question is 'why does dnf think I still need rpm-python3 and rpm-python instead of the python2-rpm and python3-rpm packages that obsolete / provide them'? But it doesn't tell me and I'm reduced to playing 'dnf remove bingo' to try and figure it out.
hah, well, turns out it's relatively simple: the rpm I have installed on f24 is actually a higher NEVR than f25's rpm-python2 / rpm-python3 have obsoletes for... hmm, not sure the error message could be much better in this situation, really.
(In reply to Adam Williamson from comment #1) > hah, well, turns out it's relatively simple: the rpm I have installed on f24 > is actually a higher NEVR than f25's rpm-python2 / rpm-python3 have > obsoletes for... > > hmm, not sure the error message could be much better in this situation, > really. in DNF 2.0 this is done.