plockstat hit bug for the second call

I am on T2000 with S10 U3 bits of KernelID = Generic_118833-18

# plockstat -x aggsize=500m -x dynvarsize=200m -x bufresize=auto -p 654
^C
Mutex block

Count nsec Lock Caller
--------------------------------------------------------------------- ----------
Segmentation Fault(coredump)


The core file is below:

----------------- lwp# 1 / thread# 1 --------------------
ffffffff7ee39a50 strlen (100003faa, ffffffff7ffff6e8, ffffffff7eea0ed4, ffffffff7fffed99, 0, 100003fa9) + 50
ffffffff7eea4fdc snprintf (ffffffff7ffffa10, 0, 100003fa8, 0, ffffffff7ffff740, 100003000) + 88
0000000100001cd8 ???????? (1003bff20, ff2b9bec, ffffffff7ffffa10, 28, 1, 1d)
0000000100001ff4 ???????? (10040e4d8, 10040e4f8, 2, 10040e4d8, 10040e4c8, 100106990)
ffffffff7f225664 dt_aggregate_walk_sorted (10010b500, 100001de8, 0, ffffffff7f224f08, 0, 1004395c0) + a4
0000000100002e9c main (100001, 100106000, 100000, 100001000, 100107228, 100106) + ad0
000000010000159c _start (0, 0, 0, 0, 0, 0) + 17c
----------------- lwp# 2 / thread# 2 --------------------
ffffffff7eece820 _write (102, ffffffff725fbf48, 8, 0, ffffffff7e300000, 0) + c
ffffffff7f252768 dt_proc_control (0, 1fc000, 8, ffffffff725fbf48, 1, 1) + 1f0
ffffffff7eecd2d8 _lwp_start (0, 0, 0, 0, 0, 0)