Hi there I was referred to this post which states this is actually a bug in PERL 5.12

https://rt.perl.org/Public/Bug/Display.html?id=76138

In reply to Re^9: SIG{CHLD} altered by require statement on Perl 5.12.1 by sdingare
in thread SIG{CHLD} altered by require statement on Perl 5.12.1 by sdingare

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