PathNotChild traceback trying to add a directory that's inside a different working tree

[Mark Summerfield]

I moved two directories (both of which I'd done bzr init; bzr add; bzr ci on) under another directory that itself was within a repository. So the error was mine. Nonetheless, crashing rather than a sensible error message (such as "can't add files to repository X when they are already in repository Y") would help.

Traceback:
 Traceback (most recent call last):
   File "/usr/lib/python2.6/dist-packages/bzrlib/commands.py", line 842, in exception_to_return_code
     return the_callable(*args, **kwargs)
   File "/usr/lib/python2.6/dist-packages/bzrlib/commands.py", line 1037, in run_bzr
     ret = run(*run_argv)
   File "/usr/lib/python2.6/dist-packages/bzrlib/commands.py", line 654, in run_argv_aliases
     return self.run(**all_cmd_args)
   File "/usr/lib/python2.6/dist-packages/bzrlib/builtins.py", line 659, in run
     no_recurse, action=action, save=not dry_run)
   File "/usr/lib/python2.6/dist-packages/bzrlib/mutabletree.py", line 53, in tree_write_locked
     return unbound(self, *args, **kwargs)
   File "/usr/lib/python2.6/dist-packages/bzrlib/mutabletree.py", line 391, in smart_add
     for filepath in osutils.canonical_relpaths(self.basedir, file_list):
   File "/usr/lib/python2.6/dist-packages/bzrlib/osutils.py", line 1122, in canonical_relpaths
     return [canonical_relpath(base, p) for p in paths]
   File "/usr/lib/python2.6/dist-packages/bzrlib/osutils.py", line 1045, in relpath
     raise errors.PathNotChild(rp, base)
 PathNotChild: Path "/home/mark/books/advanced-qt-programming/sandbox/listwidgets" is not a child of path "/home/mark/books/advanced-qt-programming/sandbox/graphicseffects"