hammer2 growfs failure

gistfile1.txt

root@dragonflybsd-600-hammer2:~ # fsck_hammer2 /dev/vbd0s3
volume header
zone.0 0000000000000010 (best)
zone.1 exceeds volume size
freemap
zone.0 0000000000000010 (best)
        1 blockref (0 node, 1 leaf),  32.00KB
zone.1 exceeds volume size
volume
zone.0 0000000000000010 (best)
        149752 blockref (39975 inode, 2904 indirect, 66880 data, 39993 dirent),   2.25GB
zone.1 exceeds volume size
root@dragonflybsd-600-hammer2:~ # mount
vbd0s3 on / (hammer2, local)
devfs on /dev (devfs, nosymfollow, local)
/dev/vbd0s0a on /boot (ufs, local)
procfs on /proc (procfs, local)
tmpfs on /var/run/shm (tmpfs, local)
root@dragonflybsd-600-hammer2:~ # cat /etc/fstab 
# Device		Mountpoint	FStype	Options		Dump	Pass#
vbd0s3               /               hammer2	rw	1 1
vbd0s0a              /boot           ufs	rw	1 1
vbd0s1               none            swap	sw	0 0
proc                 /proc           procfs	rw	4 4

root@dragonflybsd-600-hammer2:~ # gpt show vbd0
     start      size  index  contents
         0         1      -  PMBR
         1         1      -  Pri GPT header
         2        32      -  Pri GPT table
        34      2014      -  Unused
      2048   2097152      0  GPT part - DragonFly Label32
   2099200   1048576      1  GPT part - EFI System
   3147776   2000896      2  GPT part - FreeBSD Swap
   5148672   2850816      3  GPT part - DragonFly HAMMER2
   7999488  23457792      -  Unused



root@dragonflybsd-600-hammer2:~ # gpt expand vbd0
Expand GPT by 23457280 blocks
expand entry 3 type=00000000-0000-0000-0000-000000000000 5148672,7999487 to 31455231
root@dragonflybsd-600-hammer2:~ # gpt show vbd0
     start      size  index  contents
         0         1      -  PMBR
         1         1      -  Pri GPT header
         2        32      -  Pri GPT table
        34      2014      -  Unused
      2048   2097152      0  GPT part - DragonFly Label32
   2099200   1048576      1  GPT part - EFI System
   3147776   2000896      2  GPT part - FreeBSD Swap
   5148672  26306560      3  GPT part - DragonFly HAMMER2
  31455232      2015      -  Unused
  31457247        32      -  Sec GPT table
  31457279         1      -  Sec GPT header




root@dragonflybsd-600-hammer2:~ # hammer2 growfs /
/ grown to 13463715840
root@dragonflybsd-600-hammer2:~ # hammer2 show vbd0
hammer2: /dev/vbd0 #0: bad magic
root@dragonflybsd-600-hammer2:~ # fsck_hammer2 /dev/vbd0s3
fsck_hammer2: /dev/vbd0s3 #2: bad magic