Segmentation fault on partition mount

My distro: Archlinux
Kernel: 2.6.34-rc5, 2.6.33.3
I has 522 Gib btrfs partition and. While I was checking out chromium source, free space on my /home btrfs partition was about 20 Gib. Then I received message "not enough free space" (but there was enough of it). And even after btrfsck I always get segmentation fault. Even btrfs-debug-tree can't be done successfully. How can this bug be fixed?

P.S.

I can't find btrfs-image in btrfs-progs-unstable from the Archlinux repo.

So you may have run out of metadata space. If you run btrfs filesystem df /mnt/point it will tell you the block groups and how much space is in them. You may want to do a btrfs-vol -b /mnt/point. Thanks,

Josef