Comment 6 for bug 390502

Keybuk tried upgrading a project to 2a today, which was denied because of stacked branches. To me it isn't clear what the way forward is with stacking. Some related bugs:

  plan and ui for upgrading multiple stacked branches: bug #374735
  pushing a 1.9 branch stacked on a 2a branch: bug #393677

Bundles look broken, that doesn't stop upgrading per se but might be problematic with the development process.

  https://bugs.edge.launchpad.net/bzr/+bug/393349

Are there other things that need to be resolved before a bzr.dev upgrade?