panic: trap type 4, code=0, pc=ffffffff8187504e
Starting stack trace...
panic(ffffffff83311524) at panic+0x1ba sys/kern/subr_prf.c:229
kerntrap(ffff80002a8a7410) at kerntrap+0x2bb sys/arch/amd64/amd64/trap.c:482
alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b
sys_semop(ffff80002a7c2a58,ffff80002a8a76c0,ffff80002a8a7610) at sys_semop+0x3ae sys/kern/sysv_sem.c:620
syscall(ffff80002a8a76c0) at syscall+0x97e mi_syscall sys/sys/syscall_mi.h:-1 [inline]
syscall(ffff80002a8a76c0) at syscall+0x97e sys/arch/amd64/amd64/trap.c:742
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xd22c0395900, count: 251
End of stack trace.