perl-Dancer2-Plugin-REST-1.02-27.fc45 fails to build in Fedora 45 because a test fails:

    #   Failed test '$data has been encoded'
    #   at t/02_prepare_serializer_for_format.t line 82.
    #          got: '{"foo":"42"}'
    #     expected: '{"foo":42}'
    # Looks like you failed 1 test of 2.
#   Failed test '(?^:application/json)'
#   at t/02_prepare_serializer_for_format.t line 70.
# Looks like you failed 1 test of 6.
t/02_prepare_serializer_for_format.t .. 
Dubious, test returned 1 (wstat 256, 0x100)
Failed 1/6 subtests 

A difference beteen passing and failing build root is at <https://koschei.fedoraproject.org/build/22696632>. An upgrade of perl-JSON from 4.10-9.fc44 to 4.11-1.fc45 is suspicious.