This bug can be generalized further - rather than just applying to rich/poor root mismatches, any failure of bzr to deserialize the merge directive into a newly created branch for the purpose results in the newly created branch being left around, containing no additional revisions beyond its stacking base.
This bug can be generalized further - rather than just applying to rich/poor root mismatches, any failure of bzr to deserialize the merge directive into a newly created branch for the purpose results in the newly created branch being left around, containing no additional revisions beyond its stacking base.