panic: trap type 6, code=10, pc=0
Starting stack trace...
panic(ffffffff82faf9e0) at panic+0x1ba sys/kern/subr_prf.c:229
kerntrap(ffff80002a454e70) at kerntrap+0x28b sys/arch/amd64/amd64/trap.c:327
alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b
0(fffffd8059edddf0,fffffd8059edddf0,0,fffffd8059edddf0,5d0,0) at 0
softclock_process_kclock_timeout(fffffd8059edddf0,0) at softclock_process_kclock_timeout+0x2a0 sys/kern/kern_timeout.c:693
softclock(0) at softclock+0x199 sys/kern/kern_timeout.c:746
softintr_dispatch(0) at softintr_dispatch+0xea sys/arch/amd64/amd64/softintr.c:90
Xsoftclock() at Xsoftclock+0x27
Xspllower() at Xspllower+0x1d
printf(ffffffff830a0c2e) at printf+0xa3 sys/kern/subr_prf.c:532
uvm_fault_unwire_locked(fffffd8077c5b410,af82982d000,af829a2c000) at uvm_fault_unwire_locked+0x2f2
uvm_unmap_kill_entry_withlock(fffffd8077c5b410,fffffd806c171ee8,0) at uvm_unmap_kill_entry_withlock+0x81 sys/uvm/uvm_map.c:1861
uvm_map_teardown(fffffd8077c5b410) at uvm_map_teardown+0x1c7 sys/uvm/uvm_map.c:2498
uvmspace_free(fffffd8077c5b410) at uvmspace_free+0xbd sys/uvm/uvm_map.c:3422
reaper(ffff80002a457be0) at reaper+0x225 sys/kern/kern_exit.c:481
end trace frame: 0x0, count: 242
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 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 0x000f27c0: 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