[oalders]

Some of that code has been running for a long time. A lot of the Perl toolchain still works on 5.8.1 (released Sept 2003).

https://metacpan.org/release/JHI/perl-5.8.1

Test::Simple still targets 5.6.2, which looks to have been released around the same time (November 2003).

https://metacpan.org/release/RGARCIA/perl-5.6.2