[BUG] bzr diff -r -2..-1 not working in branch w/o working tree

[Alexander Belchenko]

I have shared repo without working trees. I have branch inside this
shared repo. Trying to get diff of past revisions I've got error:

$ bzr diff -r-2..-1
bzr: ERROR: No WorkingTree exists for
file:///I:/bzr-repos/trunk/.bzr/checkout/.

I don't think that for this diff working tree is really needed.

--
Alexander