You could probably fix it on the perl side by dropping a shared ref into the object and testing that in DESTROY. 

my $OB = bless { piggy => shared_clone([]) };
my $T = async { };

say threads::shared::_refcnt($OB->{piggy});
$T->join;
say threads::shared::_refcnt($OB->{piggy});

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In reply to Re: Multi-thread friendly object life-time handling for XS modules by Anonymous Monk
in thread Multi-thread friendly object life-time handling for XS modules by salva

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