panic: trap type 4, code=0, pc=ffffffff81227c4b
Starting stack trace...
panic(ffffffff82fbaa2c) at panic+0x1ba sys/kern/subr_prf.c:229
kerntrap(ffff8000376c5aa0) at kerntrap+0x28b sys/arch/amd64/amd64/trap.c:327
alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b
sys_semop(ffff800037648f58,ffff8000376c5d50,ffff8000376c5ca0) at sys_semop+0x45b sys/kern/sysv_sem.c:615
syscall(ffff8000376c5d50) at syscall+0x97e sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xf2882819290, count: 251
End of stack trace.