259
260
other_basis = other_branch.last_patch()
260
261
if base_revision == [None, None]:
265
265
raise UnrelatedBranches()
271
base_tree = get_revid_tree(base_branch, base_rev_id, tempdir,
266
base_tree = get_revid_tree(this_branch, base_rev_id, tempdir,
275
270
base_branch, base_tree = get_tree(base_revision, tempdir, "base")