The i686 packages for compiler-rt are no longer available in the x86_64 repositories starting with Fedora 27. Could you mark this package as multilb.
See https://bugzilla.redhat.com/show_bug.cgi?id=1513286
Duplicate of #501
Metadata Update from @mohanboddu: - Issue close_status updated to: Duplicate - Issue status updated to: Closed (was: Open)