panic: MNT_DEFERRED requires MNT_RECURSE | MNT_FORCE
cpuid = 0
time = 2147483676
KDB: stack backtrace:
db_trace_self_wrapper() at db_trace_self_wrapper+0xc6/frame 0xfffffe005718b610
kdb_backtrace() at kdb_backtrace+0xd0/frame 0xfffffe005718b770
vpanic() at vpanic+0x257/frame 0xfffffe005718b930
panic() at panic+0xb5/frame 0xfffffe005718b9f0
dounmount() at dounmount+0x1783/frame 0xfffffe005718bb30
kern_unmount() at kern_unmount+0x648/frame 0xfffffe005718bd10
amd64_syscall() at amd64_syscall+0x4e2/frame 0xfffffe005718bf30
fast_syscall_common() at fast_syscall_common+0xf8/frame 0xfffffe005718bf30
--- syscall (198, FreeBSD ELF64, __syscall), rip = 0x3a817a, rsp = 0x824f76f08, rbp = 0x824f76f80 ---
KDB: enter: panic
[ thread pid 1455 tid 100860 ]
Stopped at      kdb_enter+0x6e: movq    $0,0x2587a77(%rip)
db> 
db> set $lines = 0
db> set $maxwidth = 0
db>