$ perl harness ../dist/Math-BigInt/t/bare_mbi.t ../dist/Math-BigInt/t/bigintpm.t ../dist/Math-BigInt/t/sub_mbi.t
../dist/Math-BigInt/t/bare_mbi.t .. 3456/3623
#   Failed test 'bigint 2**64-1 as number'
#   at t/bigintpm.inc line 538.
#          got: '1.84467440737096e+019'
#     expected: '18446744073709551615'

#   Failed test 'bigint -2**63 as number'
#   at t/bigintpm.inc line 544.
#          got: '-9.22337203685478e+018'
#     expected: '-9223372036854775808'
# Looks like you failed 2 tests of 3623.
../dist/Math-BigInt/t/bare_mbi.t .. Dubious, test returned 2 (wstat 512, 0x200)
Failed 2/3623 subtests
../dist/Math-BigInt/t/bigintpm.t .. 3089/3629
#   Failed test 'bigint 2**64-1 as number'
#   at t/bigintpm.inc line 538.
#          got: '1.84467440737096e+019'
#     expected: '18446744073709551615'

#   Failed test 'bigint -2**63 as number'
#   at t/bigintpm.inc line 544.
#          got: '-9.22337203685478e+018'
#     expected: '-9223372036854775808'
# Looks like you failed 2 tests of 3629.
../dist/Math-BigInt/t/bigintpm.t .. Dubious, test returned 2 (wstat 512, 0x200)
Failed 2/3629 subtests
../dist/Math-BigInt/t/sub_mbi.t ... 2909/3628
#   Failed test 'bigint 2**64-1 as number'
#   at t/bigintpm.inc line 538.
#          got: '1.84467440737096e+019'
#     expected: '18446744073709551615'

#   Failed test 'bigint -2**63 as number'
#   at t/bigintpm.inc line 544.
#          got: '-9.22337203685478e+018'
#     expected: '-9223372036854775808'
# Looks like you failed 2 tests of 3628.
../dist/Math-BigInt/t/sub_mbi.t ... Dubious, test returned 2 (wstat 512, 0x200)
Failed 2/3628 subtests

Test Summary Report
-------------------
../dist/Math-BigInt/t/bare_mbi.t (Wstat: 512 Tests: 3623 Failed: 2)
  Failed tests:  3571, 3573
  Non-zero exit status: 2
../dist/Math-BigInt/t/bigintpm.t (Wstat: 512 Tests: 3629 Failed: 2)
  Failed tests:  3577, 3579
  Non-zero exit status: 2
../dist/Math-BigInt/t/sub_mbi.t (Wstat: 512 Tests: 3628 Failed: 2)
  Failed tests:  3571, 3573
  Non-zero exit status: 2
Files=3, Tests=10880,  7 wallclock secs ( 0.84 usr +  0.02 sys =  0.86 CPU)
Result: FAIL