Of course, if you could track down what type of handle is leaking first (not easy!)

Actually, it is easy. ;-) The sysinternals nthandle utility will tell you.

perl.exe pid: 3980
    4: Thread        perl.exe(3980): 5816
    8: Thread        perl.exe(3980): 3388
    c: Thread        perl.exe(3980): 3604
   10: Thread        perl.exe(3980): 4528
   14: Thread        perl.exe(3980): 1340
   18: Thread        perl.exe(3980): 3316
...

[download]

In reply to Re^2: Perl threads test on Windows: how to close thread handles? by eyepopslikeamosquito
in thread Perl threads test on Windows: how to close thread handles? by eyepopslikeamosquito

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