"AttributeError: children" in inventory.py during 'bzr ls bzr://.../FILE'

[Andrew Bennetts]

In one terminal, start a smart server serving a branch (or repo) of bzr.dev:

$ bzr serve

In another, do a bzr ls of Makefile (or any other file) in that branch:

$ bzr ls bzr://localhost/devel/Makefile

You'll get a crash like:

bzr: ERROR: exceptions.AttributeError: children

Traceback (most recent call last):
  File "/home/andrew/code/bzr/bzrlib/commands.py", line 826, in exception_to_return_code
    return the_callable(*args, **kwargs)
  File "/home/andrew/code/bzr/bzrlib/commands.py", line 1027, in run_bzr
    ret = run(*run_argv)
  File "/home/andrew/code/bzr/bzrlib/commands.py", line 638, in run_argv_aliases
    return self.run(**all_cmd_args)
  File "/home/andrew/code/bzr/bzrlib/commands.py", line 1042, in ignore_pipe
    result = func(*args, **kwargs)
  File "/home/andrew/code/bzr/bzrlib/builtins.py", line 2548, in run
    from_dir=relpath, recursive=recursive):
  File "/home/andrew/code/bzr/bzrlib/revisiontree.py", line 132, in list_files
    for path, entry in entries:
  File "/home/andrew/code/bzr/bzrlib/inventory.py", line 789, in iter_entries
    children = from_dir.children.items()
AttributeError: children

It's probably shallow.