panic: trap type 4, code=0, pc=ffffffff815aaaa9
Starting stack trace...
panic(ffffffff833136eb) at panic+0x1ba sys/kern/subr_prf.c:229
kerntrap(ffff80002a775800) at kerntrap+0x2eb sys/arch/amd64/amd64/trap.c:486
alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b
mtx_enter(dead4110dead41f8) at mtx_enter+0x59 sys/kern/kern_lock.c:335
prsignal(dead4110dead4110,14) at prsignal+0x36 sys/kern/kern_sig.c:904
reaper(ffff80002a777718) at reaper+0x2cc sys/kern/kern_exit.c:516
end trace frame: 0x0, count:
 251
End of stack trace.
syncing disks...34 33 1 1 1 1 1 1 set $lines = 0
1 1 1 set $maxwidth = 0
1 1 show panic
1 1 trace
1 1 show registers
1 show proc
1 1 ps
 giving up

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 6a63e308-43db-2955-5bd8-f45d251cdfc1
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> show malloc
boot: illegal argument malloc
boot> show all pools
boot> machine ddbcpu 0
machine: syntax error
boot> trace
boot> machine ddbcpu 1
machine: syntax error
boot> trace