I had this very same problem, and I finally figured it out.
If you change this line (in new()): 
  my ( $pkg,$config ) = @_;

[download]
To this: 
  my $pkg    = shift;
  my $config = shift;

[download]
then it will work.

I suspect that there's too much magic associated with the @_ variable to let threads play nicely with it. So, my recommendation is to *not* use @_ in the same scope as you launch new threads.

Update:
Unfortunately, including other modules (say, XML::DOM) may cause this same problem, so you'd have to launch all of your threads before bringing in such modules. This might be a good use for Thread::Pool...

In reply to Re: threads and leaking scalars (Scalars leaked: 1) by dpmott
in thread threads and leaking scalars by deliria

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