panic: trap type 6, code=10, pc=0
Starting stack trace...
panic(ffffffff832fae4b) at panic+0x1ba sys/kern/subr_prf.c:229
kerntrap(ffff80003c9fd980) at kerntrap+0x28b sys/arch/amd64/amd64/trap.c:327
alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b
0(fffffd806a566f08,fffffd806a566f08,0,fffffd806a566f08,2d0,0) at 0
softclock_process_kclock_timeout(fffffd806a566f08,0) at softclock_process_kclock_timeout+0x2a0 sys/kern/kern_timeout.c:692
softclock(0) at softclock+0x199 sys/kern/kern_timeout.c:745
softintr_dispatch(0) at softintr_dispatch+0xfe sys/kern/kern_softintr.c:87
dosoftint(0) at dosoftint+0x48 sys/arch/amd64/amd64/intr.c:840
Xsoftclock() at Xsoftclock+0x27
end of kernel
end trace frame: 0x7400328b7630, count: 248
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 e4c28bce-9379-8bb2-f2c8-a7cf484f58e0
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 0x000f2820: 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 3.67
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