panic: trap type 4, code=0, pc=ffffffff812e58ab
Starting stack trace...
panic(ffffffff832dd026) at panic+0x1ba sys/kern/subr_prf.c:229
kerntrap(ffff80002f111630) at kerntrap+0x28b sys/arch/amd64/amd64/trap.c:327
alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b
sys_semop(ffff80003c97c030,ffff80002f1118e0,ffff80002f111830) at sys_semop+0x45b sys/kern/sysv_sem.c:615
syscall(ffff80002f1118e0) at syscall+0x97e sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xd0c6a97d280, count: 251
End of stack trace.