[PATCH STABLE] revset: avoid O(n) lookup of invalid revision in rev()

[David Soria Parra]

Yuya Nishihara <yuya at tcha.org> writes:

> # HG changeset patch
> # User Yuya Nishihara <yuya at tcha.org>
> # Date 1414068817 -32400
> #      Thu Oct 23 21:53:37 2014 +0900
> # Branch stable
> # Node ID 42c36ac3d11ea9ff707279737538463f7877be04
> # Parent  d583f1cfca9670946d7e315df4d0a0efccb7a612
> revset: avoid O(n) lookup of invalid revision in rev()
>

Queued for clowncopter. Thank you.