What's the meaning of this error?

[Martin Pool]

On 1 August 2011 15:26, 罗勇刚(Yonggang Luo) <luoyonggang at gmail.com> wrote:
> bzr: ERROR: An inconsistent delta was supplied: [(None,

It's an internal error; without more information about what you're
trying to do it's hard to tell what would be causing it.  It looks
like you're using bzr-svn and so the first thing I'd recommend is
checking you have the tip of bzr and bzr-svn.

m