panic: inp_join_group: imf_sources not empty
cpuid = 1
time = 1554913005
KDB: stack backtrace:
db_trace_self_wrapper() at db_trace_self_wrapper+0x47/frame 0xfffffe001fa81520
vpanic() at vpanic+0x1e0/frame 0xfffffe001fa81580
panic() at panic+0x43/frame 0xfffffe001fa815e0
inp_setmoptions() at inp_setmoptions+0x4023/frame 0xfffffe001fa817c0
ip_ctloutput() at ip_ctloutput+0x80f/frame 0xfffffe001fa81810
rip_ctloutput() at rip_ctloutput+0x2c9/frame 0xfffffe001fa81850
sosetopt() at sosetopt+0x101/frame 0xfffffe001fa818d0
kern_setsockopt() at kern_setsockopt+0x158/frame 0xfffffe001fa81950
sys_setsockopt() at sys_setsockopt+0x33/frame 0xfffffe001fa81980
amd64_syscall() at amd64_syscall+0x436/frame 0xfffffe001fa81ab0
fast_syscall_common() at fast_syscall_common+0x101/frame 0xfffffe001fa81ab0
--- syscall (198, FreeBSD ELF64, nosys), rip = 0x412f1a, rsp = 0x7fffdffdcf38, rbp = 0x5 ---
KDB: enter: panic
[ thread pid 777 tid 100120 ]
Stopped at      kdb_enter+0x6a: movq    $0,kdb_why