Bug 1502458

Description of problem:
Fedora's vim package had a long-standing bug where installing vim-common (which is pulled in by install /usr/bin/vim or gvim etc) would fail with a file conflict if you had a different version of vim-minimal already installed. (Bug 1066983, bug 1329015, bug 1339713, and about a million other dupes... finally fixed in bug 1487175). Like this:

$ sudo dnf upgrade vim
Last metadata expiration check: 2:21:33 ago on Mon Oct 16 11:59:09 2017.
Dependencies resolved.
==============================================================================================
 Package                Arch             Version                      Repository         Size
==============================================================================================
Upgrading:
 vim-X11                x86_64           2:8.0.1030-1.fc25            updates           1.4 M
 vim-common             x86_64           2:8.0.1030-1.fc25            updates           6.7 M
 vim-enhanced           x86_64           2:8.0.1030-1.fc25            updates           1.3 M

Transaction Summary
==============================================================================================
Upgrade  3 Packages

Total size: 9.4 M
Is this ok [y/N]: y
Downloading Packages:
[SKIPPED] vim-enhanced-8.0.1030-1.fc25.x86_64.rpm: Already downloaded                        
[SKIPPED] vim-common-8.0.1030-1.fc25.x86_64.rpm: Already downloaded                          
[SKIPPED] vim-X11-8.0.1030-1.fc25.x86_64.rpm: Already downloaded                             
Running transaction check
Transaction check succeeded.
Running transaction test
The downloaded packages were saved in cache until the next successful transaction.
You can remove cached packages by executing 'dnf clean packages'.
Error: Transaction check error:
  file /usr/share/man/man1/vim.1.gz from install of vim-common-2:8.0.1030-1.fc25.x86_64 conflicts with file from package vim-minimal-2:8.0.823-1.fc25.x86_64

It sounds like a weird edge case but it's actually not, because vim-minimal is in the minimal install and on all the cloud images. So assuming you started from some slightly out of date install media, and then tried "dnf install vim" because you wanted a real editor, it would fail with an error similar to the above.

The "solution" offered for quite a few years was to just explicitly upgrade vim-minimal first to a matching version, although the conflict message gave little hint that that would be a valid solution.

The real solution (in bug 1487175) was to add a Conflicts in vim-common for older versions of vim-minimal, so that yum/dnf would know it had to upgrade vim-minimal.

For all the years that this was broken (missing the explicit Conflicts) rpmdeplint *could* have been finding this problem. But it doesn't catch it.

Version-Release number of selected component (if applicable):
1.3

How reproducible:
somewhat easily

Steps to Reproduce:
1. Download packages from https://koji.fedoraproject.org/koji/buildinfo?buildID=822026
2. Run rpmdeplint against F25 release repo, for example:
rpmdeplint check-conflicts --repo fedora,http://download.fedoraproject.org/pub/fedora/linux/releases/25/Everything/x86_64/os/ vim*-8.0.118-1.fc25.x86_64.rpm 

(Note that if you test a newer build of vim against Fedora 25 released repos, it may ignore the conflicts because of unsatisfied dependencies for Perl stuff. And if you run the test with Fedora 25 *updates* repo enabled, it will not find any conflict because newer vim is already present.)

Actual results:
No problems found

Expected results:
An error about undeclared file conflicts