#6  0x40350460 in Perl_ithread_destruct ()
#7  0x403505a4 in ithread_mg_free ()
#8  0x400a4e31 in Perl_sv_unmagic ()
#9  0x403515fa in Perl_ithread_DESTROY ()
#10 0x40352d41 in XS_threads_DESTROY ()
#11 0x4009d71b in Perl_pp_entersub ()