SYZFAIL: leak checking is not implemented
 (errno 0: No error: 0)
if_delmulti_locked: detaching ifnet instance 0xfffffe0058543800
if_delmulti_locked: detaching ifnet instance 0xfffffe0058543800
if_delmulti_locked: detaching ifnet instance 0xfffffe0058543800
if_delmulti_locked: detaching ifnet instance 0xfffffe0058543800
Expensive callout(9) function: 0xffffffff81a34600(0) 0.005791323 s
if_delmulti_locked: detaching ifnet instance 0xfffffe0058543800
if_delmulti_locked: detaching ifnet instance 0xfffffe0058543800