panic: trap type 4, code=0, pc=ffffffff82016535
Starting stack trace...
panic(ffffffff833a1a9b) at panic+0x1d0 sys/kern/subr_prf.c:229
kerntrap(ffff8000358331c0) at kerntrap+0x30b
alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b
sys_semop(ffff800033c08020,ffff800035833440,ffff800035833390) at sys_semop+0x3d5 sys/kern/sysv_sem.c:617
syscall(ffff800035833440) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff800035833440) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:746
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7043cf78d90, count: 251
End of stack trace.