% perl -MPerl::Lint=lint -wle 'lint([shift])' lib/Perl/Lint/Policy/ValuesAndExpressions/RequireNumberSeparators.pm
Can't use an undefined value as an ARRAY reference at /home/syohei/.plenv/versions/5.20.0/lib/perl5/site_perl/5.20.0/Regexp/Parser.pm line 191.
This might be
Regexp::Parser
issue.