424
424
raise errors.NoCommonAncestor(left_revision, right_revision)
428
428
"""Iterate the ancestry of this revision.
430
430
The specific order is undefined, but children should be returned before
433
434
:return: Yield tuples mapping a revision_id to its parents for the
436
441
# XXX: Do we want to guarantee that children will be returned before
437
442
# parents? At present that is the order, but I don't know that it
438
443
# is beneficial to require it.
442
447
processed.update(pending)