Bug in ls

[ArneBachmann]

local variable 'matches' referenced before assignment
Traceback (most recent call last):
  File "d:\arne\projects\sos\sos\sos.py", line 1149, in parse
    ls(relativize(root, cwd if argument is None else os.path.join(cwd, argument))[1], options)  # TODO avoid and/or normalize root super paths (..)  # line 938
  File "d:\arne\projects\sos\sos\sos.py", line 948, in ls
    matches.sort(key=lambda element: len(element))  # line 792
UnboundLocalError: local variable 'matches' referenced before assignment
  File "D:\apps\Miniconda3\Scripts\sos-script.py", line 11, in <module>
    load_entry_point('sos-vcs', 'console_scripts', 'sos')()
  File "d:\arne\projects\sos\sos\sos.py", line 1196, in main
    parse(root, cwd)  # line 971
  File "d:\arne\projects\sos\sos\sos.py", line 1173, in parse
    traceback.print_stack()  # line 953
[EXIT] An internal error occurred in SOS. Please report above message to the project maintainer at  https://github.com/ArneBachmann/sos/issues  via 'New Issue'.
Please state your installed version via 'sos version', and what you were doing..