Empty root URI results in failed config in_parents call

[gatesn]

2017-08-02 01:55:18,887 UTC - ERROR - pyls.language_server - CAUGHT Traceback (most recent call last): File "/home/phantomape/Tools/anaconda2/lib/python2.7/site-packages/pyls/language_server.py", line 67, in wrapped return func(*args, **kwargs) File "/home/phantomape/Tools/anaconda2/lib/python2.7/site-packages/pyls/python_ls.py", line 108, in m_text_document__did_open self.workspace.put_document(textDocument['uri'], textDocument['text'], version=textDocument.get('version')) File "/home/phantomape/Tools/anaconda2/lib/python2.7/site-packages/pyls/workspace.py", line 41, in put_document doc_uri, content, sys_path=self.syspath_for_path(path), version=version File "/home/phantomape/Tools/anaconda2/lib/python2.7/site-packages/pyls/workspace.py", line 69, in syspath_for_path files = config.find_parents(self.root, path, ['setup.py']) or [] File "/home/phantomape/Tools/anaconda2/lib/python2.7/site-packages/pyls/config.py", line 74, in find_parents raise ValueError("Path %s not in %s" % (path, root)) ValueError: Path /1 not in