illumos gate

I was poking at a crashdump, and then all of the sudden, mdb died.

> ::iscsi_conn -v
IDM Conn de5b5000

*** mdb: received signal SEGV at:
    [1] mdb`mdb_nhconvert+0x91()
    [2] idm.so`sa_to_str+0x98()
    [3] idm.so`iscsi_print_idm_conn_data+0x2f()
    [4] idm.so`iscsi_print_iscsit_conn_data+0x23()
    [5] idm.so`iscsi_conn_impl+0x338()
    [6] idm.so`iscsi_conn_walk_cb+0x11()
    [7] genunix.so`list_walk_step+0x99()
    [8] mdb`walk_step+0x59()
    [9] mdb`walk_common+0x80()
    [10] mdb`mdb_pwalk+0x32()
    [11] idm.so`iscsi_walk_all_conn+0x6e()
    [12] idm.so`iscsi_conn+0x157()
    [13] mdb`dcmd_invoke+0x4e()
    [14] mdb`mdb_call_idcmd+0x134()
    [15] mdb`mdb_call+0x39b()
    [16] mdb`yyparse+0x473()
    [17] mdb`mdb_run+0x2eb()
    [18] mdb`main+0x13e3()
    [19] mdb`_start+0x7d()

mdb: (c)ore dump, (q)uit, (r)ecover, or (s)top for debugger [cqrs]? 
mdb: attempting to dump core ...

Memory fault(coredump)