How do I update a working tree to an old revision?

[Vincent Ladeuil]

>>>>> "Nicholas" == Nicholas Allen <nick.allen at onlinehome.de> writes:

    Nicholas> Hi,
    Nicholas> I would like to update my working tree to an old revision to see where a
    Nicholas> bug was introduced. The update command does not have a -r option to
    Nicholas> specify the revision.

  bzr pull --overwrite -rxxx

in a clean tree should do it.