panic: trap type 6, code=10, pc=3c729
Starting stack trace...
panic(ffffffff8282ae09) at panic+0x159 sys/kern/subr_prf.c:229
kerntrap(ffff80002f92b110) at kerntrap+0x1c7 sys/arch/amd64/amd64/trap.c:327
alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b
acpi_pdirpa() at acpi_pdirpa+0x2859a
rt_match(ffff80002f92b3f0,0,1,0) at rt_match+0xc3 rt_clone sys/net/route.c:383 [inline]
rt_match(ffff80002f92b3f0,0,1,0) at rt_match+0xc3 sys/net/route.c:358
icmp_reflect(fffffd807835f800,0,0) at icmp_reflect+0x1ca sys/netinet/ip_icmp.c:740
icmp_error(fffffd807835f400,3,5,0,0) at icmp_error+0x61 sys/netinet/ip_icmp.c:300
ip_dooptions(fffffd807835f400,ffff800000da4800) at ip_dooptions+0x87c ipstat_inc sys/netinet/ip_var.h:151 [inline]
ip_dooptions(fffffd807835f400,ffff800000da4800) at ip_dooptions+0x87c sys/netinet/ip_input.c:1381
ip_input_if(ffff80002f92b688,ffff80002f92b694,ffff800037a00000,0,ffff800000da4800) at ip_input_if+0x1d3 sys/netinet/ip_input.c:475
ipv4_input(ffff800000da4800,fffffd807835f400) at ipv4_input+0x47 sys/netinet/ip_input.c:327
ether_input(ffff800000da4800,fffffd807835f400) at ether_input+0x525
tun_dev_write(5d04,ffff80002f92ba08,ffff800037a00000,2) at tun_dev_write+0x209 sys/net/if_tun.c:914
spec_write(ffff80002f92b860) at spec_write+0xd8 sys/kern/spec_vnops.c:302
VOP_WRITE(fffffd80742dab10,ffff80002f92ba08,11,fffffd807f7d7750) at VOP_WRITE+0xc3 sys/kern/vfs_vops.c:245
vn_write(fffffd806b9f95b0,ffff80002f92ba08,0) at vn_write+0x157 sys/kern/vfs_vnops.c:408
dofilewritev(ffff80002df11750,c8,ffff80002f92ba08,0,ffff80002f92bac0) at dofilewritev+0x1a9 sys/kern/sys_generic.c:375
sys_write(ffff80002df11750,ffff80002f92bb70,ffff80002f92bac0) at sys_write+0x87 sys/kern/sys_generic.c:295
syscall(ffff80002f92bb70) at syscall+0x72a sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xca5c5d61910, count: 238
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 0fee9609-1d66-d0cb-3385-b9d53e0469ef
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 $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