Why does he say it is bad behaviour ?
okay, I have to admit that some compilers
'n stuff are not that smart and start allocing
and de-allocing variables right aways when out of
scope (not so handy when you're redeclaring IN
a loop that runs a million times or so)

But, initialising a new var in the while of the loop is not
that bad I think, it's just local to the loop, declared
once, and out of scope out of your loop... works for me..

By the way... while (my $Var) is NOT initialising,
$Var is allocated as undef, then processed by the while,
verified as not true, and the code in the while will
never run

But then again... what do I know....