Comment 2 for bug 389413

It also occurs when run with arguments: ['./bzr', '-Dhpss', 'diff', '-c', '4148', 'lp:bzr'] on lp:bzr which should not be stacked therefore might avoid some problems.

This command _does_ work with bzr nightly 1.15+4441+115 but it fails using my copy of trunk on revno 4463. So it seems like a recent regression.