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Date: Thu, 22 Aug 2013 09:09:14 -0500
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Subject: Re: Question: How can I recover this partition? (unable to find
 logical $hugenum len 4096)
From: Mitch Harder <mitch.harder@sabayonlinux.org>
To: Nicholas Lee <email@nickle.es>
Cc: linux-btrfs <linux-btrfs@vger.kernel.org>
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On Thu, Aug 22, 2013 at 1:47 AM, Nicholas Lee <email@nickle.es> wrote:

> [   45.914275] ------------[ cut here ]------------
> [   45.914406] kernel BUG at fs/btrfs/volumes.c:4417!
> [   45.914489] invalid opcode: 0000 [#1] PREEMPT SMP

I can't say if this will fix your problem or not, but the 3.10.x
kernel has a patch to pass this error back instead of halting with a
BUG() at this point.