panic: trap type 4, code=0, pc=ffffffff82136d80
Starting stack trace...
panic(ffffffff8256e57f) at panic+0x155 sys/kern/subr_prf.c:229
kerntrap(ffff80002e9d37c0) at kerntrap+0x1b7 sys/arch/amd64/amd64/trap.c:313
alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b
done_flush() at done_flush+0x38
vm_run(ffff80002e9d3cd0) at vm_run+0x213 sys/arch/amd64/amd64/vmm.c:4564
vmmioctl(a00,c0205602,ffff80002e9d3cd0,1,ffff8000231da2a8) at vmmioctl+0x192 sys/arch/amd64/amd64/vmm.c:685
VOP_IOCTL(fffffd806ec54870,c0205602,ffff80002e9d3cd0,1,fffffd807f7d76e8,ffff8000231da2a8) at VOP_IOCTL+0x8d sys/kern/vfs_vops.c:264
vn_ioctl(fffffd80688b0538,c0205602,ffff80002e9d3cd0,ffff8000231da2a8) at vn_ioctl+0xb7 sys/kern/vfs_vnops.c:525
sys_ioctl(ffff8000231da2a8,ffff80002e9d3de8,ffff80002e9d3e40) at sys_ioctl+0x49e
syscall(ffff80002e9d3eb0) at syscall+0x447 sys/arch/amd64/amd64/trap.c:585
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x695db9b86b0, count: 246
End of stack trace.
syncing disks...24 12  done

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 db0dc653-7a57-7afa-fd77-d87c02d918a4
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 0x000f24c0: 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 3.55
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