Btrfs devel - Jan 2014 - [BUG] Corrupt btrfs filesystem cannot be fixed by btrfs fsck or by mounting with -o restore

This is reported as bug 
https://bugzilla.kernel.org/show_bug.cgi?id=68951 since it causes a 
kernel panic - more details there.

The btrfs filesystem on my laptop became corrupted during a suspend / 
resume cycle. Afterwards, kernel 3.11 could no longer mount the 
filesystem and btrfs fsck crashed with abort() errors. Not having much 
time to deal with it, I took an image and re-installed the laptop from 
backups.

I've just tried to mount a copy of the image with 3.12, and the kernel 
successfully mounts, but a find . inside the fiesystem, segfaults. btrfs 
fsck dies with the error:

btrfsck: cmds-check.c:1320: walk_down_tree: Assertion `!(1)' failed.

I have a btrfs-image of the metadata, but it's 110Mb. I can probably 
make it available for download somewhere, meanwhile I'm happy to poke 
about if there's anything I can do to add more information.

Phil
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