Summary: Where is that reference to my variable hiding?

Description:
Tracking down reference problems (e.g. you expect some object to be
destroyed, but there are still references to it that keep it alive) can be
very hard. Fortunately, perl keeps track of all its values, so tracking
references "backwards" is usually possible.

The 'track' function can help track down some of those references back to
the variables containing them.

For example, for this fragment:

URL: http://search.cpan.org/dist/Devel-FindRef
License: GPL+ or Artistic

Maintainer: nobody