panic: trap type 6, code=10, pc=0
Starting stack trace...
panic(ffffffff8284b893) at panic+0x16f sys/kern/subr_prf.c:229
kerntrap(ffff80002a262200) at kerntrap+0x1d7 sys/arch/amd64/amd64/trap.c:327
alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b
0(fffffd8059ec0f00,fffffd8059ec0f00,0,fffffd8059ec0f00,284,0) at 0
softclock_process_kclock_timeout(fffffd8059ec0f00,0) at softclock_process_kclock_timeout+0x1cf sys/kern/kern_timeout.c:696
softclock(0) at softclock+0x150 sys/kern/kern_timeout.c:749
softintr_dispatch(0) at softintr_dispatch+0xcd sys/arch/amd64/amd64/softintr.c:90
Xsoftclock() at Xsoftclock+0x27
__mp_lock(ffffffff82e20938) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline]
__mp_lock(ffffffff82e20938) at __mp_lock+0x122 sys/kern/kern_lock.c:147
syscall(ffff80002a2625e0) at syscall+0x83b mi_syscall sys/sys/syscall_mi.h:180 [inline]
syscall(ffff80002a2625e0) at syscall+0x83b sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7ab625f8e350, count: 246
End of stack trace.

dump to dev 4,1 not possible
rebooting...
SeaBIOS (version 1.8.2-google)
Total RAM Size = 0x0000000080000000 = 2048 MiB
CPUs found: 2     Max CPUs supported: 2
SeaBIOS (version 1.8.2-google)
Machine UUID 8f385a59-d101-44dd-592e-0bd3fdfaf750
found virtio-scsi at 0:3
virtio-scsi vendor='Google' product='PersistentDisk' rev='1' type=0 removable=0
virtio-scsi blksize=512 sectors=4194304 = 2048 MiB
drive 0x000f27f0: PCHS=0/0/0 translation=lba LCHS=520/128/63 s=4194304
Sending Seabios boot VM event.
Booting from Hard Disk 0...
>> OpenBSD/amd64 BOOT 3.65
boot> set $lines = 0
set: syntax error
boot> set $maxwidth = 0
set: syntax error
boot> show panic
boot: illegal argument panic
boot> trace
boot> show registers
boot> show proc
boot> ps
boot> show all locks
boot> show malloc
boot> show all pools
boot> machine ddbcpu 0
machine: syntax error
boot> trace
boot> machine ddbcpu 1
machine: syntax error
boot> trace