panic: trap type 4, code=0, pc=ffffffff8241ecda
Starting stack trace...
panic(ffffffff82743e04) at panic+0x16b sys/kern/subr_prf.c:229
kerntrap(ffff80002a003210) at kerntrap+0x1c7 sys/arch/amd64/amd64/trap.c:327
alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b
ktrops(ffff80002a025bb8,dead4110dead4110,0,80001518,fffffd806542fb08,fffffd807f7d7820) at ktrops+0x4a ktrcanset sys/kern/kern_ktrace.c:696 [inline]
ktrops(ffff80002a025bb8,dead4110dead4110,0,80001518,fffffd806542fb08,fffffd807f7d7820) at ktrops+0x4a sys/kern/kern_ktrace.c:541
doktrace(fffffd806542fb08,4,1518,ffffffff,ffff80002a025bb8) at doktrace+0x418 ktrsetchildren sys/kern/kern_ktrace.c:566 [inline]
doktrace(fffffd806542fb08,4,1518,ffffffff,ffff80002a025bb8) at doktrace+0x418 sys/kern/kern_ktrace.c:473
sys_ktrace(ffff80002a025bb8,ffff80002a003558,ffff80002a0035a0) at sys_ktrace+0xd2 sys/kern/kern_ktrace.c:529
syscall(ffff80002a003620) at syscall+0x438 mi_syscall sys/sys/syscall_mi.h:101 [inline]
syscall(ffff80002a003620) at syscall+0x438 sys/arch/amd64/amd64/trap.c:599
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x2b066e4eb00, count: 249
End of stack trace.
syncing disks...uvm_fault(0xfffffd807e9195d0, 0x47, 0, 2) -> e
fatal page fault in supervisor mode
trap type 6 code 2 rip ffffffff81335b5b cs 8 rflags 10286 cr2 47 cpl 6 rsp ffff80002a002fe0
gsbase 0xffff800020d68ff0  kgsbase 0x0
panic: trap type 6, code=2, pc=ffffffff81335b5b
Starting stack trace...
panic(ffffffff82743e04) at panic+0x16b sys/kern/subr_prf.c:229
kerntrap(ffff80002a002f30) at kerntrap+0x1c7 sys/arch/amd64/amd64/trap.c:327
alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b
bufcache_take(fffffd806697ced8) at bufcache_take+0x1bb sys/kern/vfs_bio.c:1726
vfs_syncwait(ffff80002a025bb8,1) at vfs_syncwait+0xc4 sys/kern/vfs_subr.c:1826
vfs_shutdown(ffff80002a025bb8) at vfs_shutdown+0x5d sys/kern/vfs_subr.c:1791
boot(100) at boot+0xc8 sys/arch/amd64/amd64/machdep.c:843
hubbub31_init_dchub_sys_ctx(100,100) at hubbub31_init_dchub_sys_ctx
panic(ffffffff82743e04) at panic+0x18b sys/kern/subr_prf.c:231
kerntrap(ffff80002a003210) at kerntrap+0x1c7 sys/arch/amd64/amd64/trap.c:327
alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b
ktrops(ffff80002a025bb8,dead4110dead4110,0,80001518,fffffd806542fb08,fffffd807f7d7820) at ktrops+0x4a ktrcanset sys/kern/kern_ktrace.c:696 [inline]
ktrops(ffff80002a025bb8,dead4110dead4110,0,80001518,fffffd806542fb08,fffffd807f7d7820) at ktrops+0x4a sys/kern/kern_ktrace.c:541
doktrace(fffffd806542fb08,4,1518,ffffffff,ffff80002a025bb8) at doktrace+0x418 ktrsetchildren sys/kern/kern_ktrace.c:566 [inline]
doktrace(fffffd806542fb08,4,1518,ffffffff,ffff80002a025bb8) at doktrace+0x418 sys/kern/kern_ktrace.c:473
sys_ktrace(ffff80002a025bb8,ffff80002a003558,ffff80002a0035a0) at sys_ktrace+0xd2 sys/kern/kern_ktrace.c:529
syscall(ffff80002a003620) at syscall+0x438 mi_syscall sys/sys/syscall_mi.h:101 [inline]
syscall(ffff80002a003620) at syscall+0x438 sys/arch/amd64/amd64/trap.c:599
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x2b066e4eb00, count: 241
End of stack trace.

dump to dev 4,1 not possible
rpaenbioco:ti nkegr.n.e.l d
iagnostic asseSeaBIOS (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 003a59b7-54eb-38ca-1cfb-72bc238e03e5
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 0x000f2480: 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