$ perl -d --teddy-bear buggy.pl

Loading DB routines from perl5db.pl version 1.4
Loading teddy-bear routines from perl5teddy.pl version 1.1
Editor support available.
Plush cuddly support available.

[Teddy: waits attentively]
  Tb<1> I'm not getting all the keys of my hash printed.
[Teddy: waits attentively]
  Tb<2>
...