4    3 0xffffffff82600000     9000 netgraph.ko
 5    1 0xffffffff82609000     2000 ng_socket.ko
 6    1 0xffffffff8260b000     1000 ng_UI.ko
LOADED
ui_cycle: uid=0
STEP socket node named uicyc
STEP mkpeer UI(U0) S.a<->U0.downstream
STEP named U0 = u0
STEP mkpeer UI(U1) U0.upstream<->U1.downstream
STEP named U1 = u1
STEP rmhook uicyc:a (U0 survives with upstream only)
STEP connect U1.upstream<->U0.downstream -- RING CLOSED
STEP injecting FLOW message to u0:downstream ...
<sendto() never returned; the ssh session died with the guest.
 Serial console (panic.txt / console_full.txt):
   panic: assertion "ref < &td->td_toks_end" failed in lwkt_gettoken
          at /usr/src/sys/kern/lwkt_token.c:661
   ng_apply_item() x3+ recursive
   Debugger("panic")  -> db> prompt, guest down>