While mucking around with Perl's Test::Simple I needed to find out the name of a sub routine from a reference. While there are several answers, finding any useful ones by the usual means was difficult. The one I landed on was using Sub::Identify, which provides the routine sub_name($) that solves the problem nicely.

Here's some example code:

perl -MSub::Identify -e 'sub bar{return "baz"};$foo=\&bar;print Sub::Identify::sub_name($foo). "\n"'

This correctly prints "bar".