The autopkgtest checks of this package recently failed on ci.debian.net.
While it works fine for me locally, the upstream ticket [rt.cpan.org #109993]
indicates the test has also occasionally failed for others on the CPAN
testers system.

Possibly those tests should be skipped/marked TODO for now to make
the test suite more robust.

https://ci.debian.net/packages/libc/libchi-perl/unstable/amd64/

  # 40 is not between 59 and 99
  not ok 952 - Memory:l1_cache size = 40

  #   Failed test 'Memory:l1_cache size = 40'
  #   at /usr/share/perl5/CHI/t/Driver.pm line 1555.
  #   (in CHI::t::Driver::Memory->test_size_awareness_with_subcaches)
  # 2 is not between 3 and 5
  not ok 953 - Memory:l1_cache keys = 2

  #   Failed test 'Memory:l1_cache keys = 2'
  #   at /usr/share/perl5/CHI/t/Driver.pm line 1557.
  #   (in CHI::t::Driver::Memory->test_size_awareness_with_subcaches)

  [...]
  Test Summary Report
  -------------------
  t/Driver-Memory.t              (Wstat: 512 Tests: 963 Failed: 2)
    Failed tests:  952-953
    Non-zero exit status: 2