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It was found here https://github.com/openSUSE/libsolv/issues/450 that upstream has a -W flag which allows you to cleanly parse debugdata generated by --debugsolver and see the dependency chain which pulls in a package.

# yum install httpd --debugsolver
# cd debugdata
# testsolv -W mod_http2 rpms/testcase.t
<I dont have this output handy but it shows that httpd requires mod_http2>


This would be very helpful in the RHEL space for debugging complicated transactions if we can implement it.

The option is present since libsolv 0.7.23, most likely a rebase to that version is required.

There is related issue - https://github.com/openSUSE/libsolv/issues/450

*** Bug 1896489 has been marked as a duplicate of this bug. ***

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory (libsolv bug fix and enhancement update), and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHBA-2023:6646