Let me guess... since in Perl5 an assignment to the declaration of a lexical variable can't contain the same lexical variable in the rhs (well, poor phrasing, but no doubt it's clear what I mean!) there's not yet full consensus on what should the name of such a sub refer to within its own body. Got it?
well, that's one thing. Then there's things like: does the sub get re-created on each scope entry (so it captures external lexical vars anew) and does it affect method resolution?