Created attachment 1458996 [details]
dnf-autoremove-fail-rep include the autoremove process, reinstall firefox and retry autoremove

Description of problem:
Info, the whole process of the autoremove is in the attachment document.
By using 'dnf autoremove' it show a list of packages they are actually and are not twice. I was confused so I have make a reboot, because directly befor I have updated the system. After the reboot the list was the same, so I done that autoremove. After that process was all listed programs deleted.
To try if it ever by the programs of the list which deleted, I reinstall firefox and start 'dnf autoremove' again. Now was the list empty, so it won't delete firefox again. 

Version-Release number of selected component (if applicable):
dnf --version
2.7.5
  Installiert: dnf-0:2.7.5-12.fc28.noarch am Di 01 Mai 2018 17:08:06 GMT
  Built    : Fedora Project at Mi 18 Apr 2018 14:29:51 GMT

  Installiert: rpm-0:4.14.1-9.fc28.x86_64 am Mo 02 Jul 2018 20:27:41 GMT
  Built    : Fedora Project at Do 24 Mai 2018 14:53:48 GMT

uname -r
4.17.3-200.fc28.x86_64


How reproducible:
I don't no.

Actual results:
After reinstalling the packages is the list of autoremove empty.

Expected results:
--

Additional info:
The Fedora 28 is a upgrade from 27 and that from 26 and so on. 
The last autoremove should be on that upgrade from 27 to 28. The big things I do as yet was installing that Qt5-stuff, steam and nvidia.
Firefox was installed from begin and for example qt5 I installed directly after the upgrade von Fedora 27 to 28. I see no dependence between the deleted programs.
Firefox was installed from the installation ISO and Qt5 installed by my self with dnf.