panic: trap type 6, code=0, pc=ffffffff82696308
Starting stack trace...
panic(ffffffff834ee9d5) at panic+0x1d0 sys/kern/subr_prf.c:229
kerntrap(ffff80002a220970) at kerntrap+0x30b
alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b
dovutimens(ffff80003c429a28,fffffd806e08f9
58,ffff80002a220b50) at dovutimens+0x368 sys/kern/vfs_syscalls.c:2690
sys_futimes(ffff80003c429a28,ffff80002a220ca0,ffff80002a220bf0) at sys_futimes+0x208 sys/kern/vfs_syscalls.c:2732
syscall(ffff80002a220ca0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80002a220ca0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x28598d39e30, count: 250
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 cf8dd37e-cfe0-74ed-667e-eb737f522d02
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 0x000f2600: 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 $lines = 0
set: syntax error
boot> set $maxwidth = 0
set: syntax error
boot> show panic
boot: illegal argument panic
boot> trace
boot>