panic: trap type 4, code=0, pc=ffffffff814aed85
Starting stack trace...
panic(ffffffff82827161) at panic+0x159 sys/kern/subr_prf.c:229
kerntrap(ffff80002f55b1f0) at kerntrap+0x1c7 sys/arch/amd64/amd64/trap.c:327
alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b
pool_do_put(ffffffff82e49888,fffffd8056361400) at pool_do_put+0x115
pool_put(ffffffff82e49888,fffffd8056361400) at pool_put+0x6b sys/kern/subr_pool.c:799
soclose(fffffd8056361400,0) at soclose+0x31e sys/kern/uipc_socket.c:461
soo_close(fffffd806328dda8,ffff80002a69d9c8) at soo_close+0x44
fdrop(fffffd806328dda8,ffff80002a69d9c8) at fdrop+0xd5 sys/kern/kern_descrip.c:1274
closef(fffffd806328dda8,ffff80002a69d9c8) at closef+0x11b sys/kern/kern_descrip.c:1258
fdfree(ffff80002a69d9c8) at fdfree+0xe3 sys/kern/kern_descrip.c:1190
exit1(ffff80002a69d9c8,0,0,1) at exit1+0x371 sys/kern/kern_exit.c:199
sys_exit(ffff80002a69d9c8,ffff80002f55b6d0,ffff80002f55b620) at sys_exit+0x1a sys/kern/kern_exit.c:89
syscall(ffff80002f55b6d0) at syscall+0x72a sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7c429e965840, count: 243
End of stack trace.
syncing disks...25 15 2 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1  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 1f64d870-06f2-d8bf-7327-adc6877a2997
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> show all pools
boot: illegal argument all
boot> machine ddbcpu 0
machine: syntax error
boot> trace
boot> machine ddbcpu 1
machine: syntax error
boot> trace