panic: trap type 6, code=10, pc=0
Starting stack trace...
panic(ffffffff8284c305) at panic+0x16f sys/kern/subr_prf.c:229
kerntrap(ffff80002a1550c0) at kerntrap+0x1d7 sys/arch/amd64/amd64/trap.c:327
alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b
0(fffffd8053565f00,fffffd8053565f00,0,fffffd8053565f00,79b,0) at 0
softclock_process_kclock_timeout(fffffd8053565f00,0) at softclock_process_kclock_timeout+0x1cf sys/kern/kern_timeout.c:696
softclock(0) at softclock+0x150 sys/kern/kern_timeout.c:749
softintr_dispatch(0) at softintr_dispatch+0xcd sys/arch/amd64/amd64/softintr.c:90
Xsoftclock() at Xsoftclock+0x27
Xspllower() at Xspllower+0x1d
printf(ffffffff82945023) at printf+0x88 sys/kern/subr_prf.c:532
uvm_fault_unwire_locked(fffffd807cfb5dd0,d97bc4ed000,d97bc6ec000) at uvm_fault_unwire_locked+0x211
uvm_unmap_kill_entry_withlock(fffffd807cfb5dd0,fffffd8068079c08,0) at uvm_unmap_kill_entry_withlock+0x6b sys/uvm/uvm_map.c:1894
uvm_map_teardown(fffffd807cfb5dd0) at uvm_map_teardown+0x1c7 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:176 [inline]
uvm_map_teardown(fffffd807cfb5dd0) at uvm_map_teardown+0x1c7 sys/uvm/uvm_map.c:2534
uvmspace_free(fffffd807cfb5dd0) at uvmspace_free+0xa6 sys/uvm/uvm_map.c:3461
reaper(ffff80002a148cd8) at reaper+0x197 sys/kern/kern_exit.c:463
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 f8e08a03-81bc-3227-53c0-939594373760
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> 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