It's a webserver backend. It doesn't call back to the main process. And it's forking, not threading.

perl -e 'use Crypt::Digest::SHA256 qw[sha256_hex]; print substr(sha256_hex("the Answer To Life, The Universe And Everything"), 6, 2), "\n";'

In reply to Re^2: Debugging DESTROY calls in forking application by cavac
in thread Debugging DESTROY calls in forking application by cavac

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