Traceback (most recent call last):


 "/usr/anaconda/bin/ipython", line 6, in <module>

sys.exit(IPython.start_ipython())


 "/usr/anaconda/lib/python2.7/site-packages/IPython/__init__.py", line 119, in start_ipython

return launch_new_instance(argv=argv, **kwargs)


 "/usr/anaconda/lib/python2.7/site-packages/traitlets/config/application.py", line 595, in launch_instance

app.initialize(argv)


 "<decorator-gen-111>", line 2, in initialize


 "/usr/anaconda/lib/python2.7/site-packages/traitlets/config/application.py", line 74, in catch_config_error

return method(app, *args, **kwargs)


 "/usr/anaconda/lib/python2.7/site-packages/IPython/terminal/ipapp.py", line 306, in initialize

self.init_shell()


 "/usr/anaconda/lib/python2.7/site-packages/IPython/terminal/ipapp.py", line 322, in init_shell

ipython_dir=self.ipython_dir, user_ns=self.user_ns)


 "/usr/anaconda/lib/python2.7/site-packages/traitlets/config/configurable.py", line 405, in instance

inst = cls(*args, **kwargs)


 "/usr/anaconda/lib/python2.7/site-packages/IPython/core/interactiveshell.py", line 465, in __init__

self.init_history()


 "/usr/anaconda/lib/python2.7/site-packages/IPython/core/interactiveshell.py", line 1586, in init_history

self.history_manager = HistoryManager(shell=self, parent=self)


 "/usr/anaconda/lib/python2.7/site-packages/IPython/core/history.py", line 520, in __init__

self.log.error("Failed to create history session in %s. History will not be saved.",
AttributeError: 'HistoryManager' object has no attribute 'log'

Traceback (most recent call last):


 "/home/user/.virtualenvs/venv/lib/python2.7/site-packages/sphinx/cmdline.py", line 296, in main

app.build(opts.force_all, filenames)


 "/home/user/.virtualenvs/venv/lib/python2.7/site-packages/sphinx/application.py", line 333, in build

self.builder.build_update()


 "/home/user/.virtualenvs/venv/lib/python2.7/site-packages/sphinx/builders/__init__.py", line 251, in build_update

'out of date' % len(to_build))


 "/home/user/.virtualenvs/venv/lib/python2.7/site-packages/sphinx/builders/__init__.py", line 322, in build

self.write(docnames, list(updated_docnames), method)


 "/home/user/.virtualenvs/venv/lib/python2.7/site-packages/sphinx/builders/__init__.py", line 360, in write

self._write_serial(sorted(docnames), warnings)


 "/home/user/.virtualenvs/venv/lib/python2.7/site-packages/sphinx/builders/__init__.py", line 368, in _write_serial

self.write_doc(docname, doctree)


 "/home/user/.virtualenvs/venv/lib/python2.7/site-packages/sphinx/builders/html.py", line 461, in write_doc

self.handle_page(docname, ctx, event_arg=doctree)


 "/home/user/.virtualenvs/venv/lib/python2.7/site-packages/sphinx/builders/html.py", line 818, in handle_page

templatename, ctx, event_arg)


 "/home/user/.virtualenvs/venv/lib/python2.7/site-packages/sphinx/application.py", line 593, in emit_firstresult

for result in self.emit(event, *args):


 "/home/user/.virtualenvs/venv/lib/python2.7/site-packages/sphinx/application.py", line 589, in emit

results.append(callback(self, *args))


 "/home/user/.virtualenvs/venv/lib/python2.7/site-packages/sphinxcontrib/fulltoc.py", line 36, in html_page_context

rendered_toc = get_rendered_toctree(app.builder, pagename)


 "/home/user/.virtualenvs/venv/lib/python2.7/site-packages/sphinxcontrib/fulltoc.py", line 57, in get_rendered_toctree

collapse=collapse,


 "/home/user/.virtualenvs/venv/lib/python2.7/site-packages/sphinxcontrib/fulltoc.py", line 82, in build_full_toctree

env.resolve_references(result, docname, builder)


 "/home/user/.virtualenvs/venv/lib/python2.7/site-packages/sphinx/environment/__init__.py", line 1036, in resolve_references

for node in doctree.traverse(addnodes.pending_xref):
AttributeError: 'NoneType' object has no attribute 'traverse'
