There have been some pretty large changes in the internals
of perl's IO handling when going from 5.6 to 5.8. But seen
from the language, there are no backwards compatability
issues. So, even if your wished script would exist, it
still wouldn't report something.
It's not inconcievable a memory leak was introduced in 5.8.
Please create a small program that doesn't leak
on 5.6, but does leak on 5.8, and report it using perlbug
as soon as you can. Jarkko released release candidate 2 for
5.8.1 today, but will be away for the next two weeks,
meaning that there is sometime left for someone to write a
patch to be included in 5.8.1. Unless the bug is already
known and fixed of course. But don't hesitate, spend some
time isolating the bug from your code now, otherwise you
might have to wait another year or so before there's a perl
that doesn't leak memory.
Abigail
