DirState.update_basis_by_delta checks Tree[0]

[Robert Collins]

On Thu, May 12, 2011 at 1:48 AM, John Arbash Meinel
<john at arbash-meinel.com> wrote:
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> I'm trying to understand some failures that I've gotten when trying to
> change pull and update to use "WT.update_basis_by_delta".

IIRC update_basis_by_delta is -specifically- written for commit, and
has sanity checks (because it was risky). You may wish to remove them
(stripping some overhead).

-Rob