eu-readelf 0.152 is unable to read (some) 64-bit s390x archives:
not a valid ELF file
This blocks internal testing.
The fix is, I believe, commit e1873141a517738d8c50923e40525bb2ae6db68a.
This was fedora bug #843019 for which Petr wrote a fix which was accepted upstream and part of elfutils 0.155 (indeed the commit mentioned in the description). He also wrote a backport against the fedora elfutils package elfutils-0.154-sym64.patch
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, and where to find the updated
files, follow the link below.
If the solution does not work for you, open a new bug report.