Subject: | use Sub::Util instead of Sub::Identify |
Sub::Util is bundled with recent versions of Perl, and is available on CPAN for older versions of Perl.
Sub::Name admittedly has better test results on Perl 5.6 and 5.8.
It should be possible to use eval to pick one or the other depending on availability, and do some dynamic config in Makefile.PL to add either Sub::Util or Sub::Name to namespace::autoclean's dependencies based on $].
I'd be happy to write a patch for this if it would help.