(trepanpl): disasm Devel::Trepan::Options::whence_file
    ...    
    OP (0x9961848)
    	op_next		0x9961828
    	op_sibling	0
    	op_ppaddr	PL_ppaddr[OP_PADSV]
    	op_type		9
    	op_flags	0000000
    	op_private	0	
(trepanpl): sprintf "%d", 0x9961848
$DB::D[7] = 160831560
(trepanpl): $c = deref(160831560)
** Bizarre copy of UNKNOWN in scalar assignment
$DB::D[8] = <undef>

Program received signal SEGV.
Segmentation fault (core dumped)