perl-autobox-Core-1.24-5.fc21 fails to build in F21 and F20 due randomly failing tests:

#   Failed test at t/flip.t line 8.
#     Structures begin differing at:
#          $got->{bar} = '2'
#     $expected->{bar} = '3'
#   Failed test 'Returns hash in list context'
#   at t/flip.t line 12.
#     Structures begin differing at:
#          $got->{bar} = '2'
#     $expected->{bar} = '3'
# Looks like you failed 2 tests of 2.
t/flip.t ......... 
Dubious, test returned 2 (wstat 512, 0x200)
Failed

This is caused by random hash key order probably.