[Bug 1399454] Using dnf tools to upgrade to 25 cannot proceed due to problems

[Red Hat Bugzilla]

https://bugzilla.redhat.com/show_bug.cgi?id=1399454

Miroslav Suchý  changed:

What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |CLOSED
                 CC|                            |[e-mail]
                   |                            |roject.org,
                   |                            |[e-mail]
          Component|fedora-upgrade              |ghc-hashed-storage
         Resolution|---                         |CANTFIX
           Assignee|[e-mail]           |[e-mail]
        Last Closed|                            |2016-11-30 08:12:56

--- Comment #3 from Miroslav Suchý  ---
The package ghc-hashed-storage has been retired and is not present in F25.
PackageKit silently remove this package. There is ongoing discussion if this is
right approach or not. In F26 there will be package fedora-obsolete-packages,
which can provide those obsoletes packages and provide clean upgrade.
Right now there is no systematic approach and only "fix" is to manualy remove
the obsoleted packages and restart upgrade once again.
The same goes for php-pecl-mongo.
For package perl-Data-Alias there is different situation and I suspect that DNF
need to remove some package, so you need to pass --allowerasing