Traceback (most recent call last):
  File ".../projects/client-qt/client_qt/main.py", line 87, in add_plot_tab
    self.plot_tab_area.currentWidget().add_data()
  File ".../projects/client-qt/client_qt/plotters/bokeh/plots.py", line 68, in add_data
    self._fig.line('x', 'y', source=source)
  File "fakesource", line 5, in line
  File ".../anaconda3/envs/cosmo_env/lib/python3.6/site-packages/bokeh/plotting/helpers.py", line 572, in func
    self.renderers.append(glyph_renderer)
  File ".../anaconda3/envs/cosmo_env/lib/python3.6/site-packages/bokeh/core/property/containers.py", line 77, in wrapper
    self._notify_owners(old)
  File ".../anaconda3/envs/cosmo_env/lib/python3.6/site-packages/bokeh/core/property/containers.py", line 107, in _notify_owners
    prop._notify_mutated(owner, old, hint)
  File ".../anaconda3/envs/cosmo_env/lib/python3.6/site-packages/bokeh/core/property/descriptors.py", line 797, in _notify_mutated
    self._real_set(obj, old, value, hint)
  File ".../anaconda3/envs/cosmo_env/lib/python3.6/site-packages/bokeh/core/property/descriptors.py", line 760, in _real_set
    self._trigger(obj, old, value, hint, setter)
  File ".../anaconda3/envs/cosmo_env/lib/python3.6/site-packages/bokeh/core/property/descriptors.py", line 837, in _trigger
    obj.trigger(self.name, old, value, hint, setter)
  File ".../anaconda3/envs/cosmo_env/lib/python3.6/site-packages/bokeh/model.py", line 238, in trigger
    super(Model, self).trigger(attr, old, new, hint, setter)
  File ".../anaconda3/envs/cosmo_env/lib/python3.6/site-packages/bokeh/util/callback_manager.py", line 105, in trigger
    self._document._notify_change(self, attr, old, new, hint, setter)
  File ".../anaconda3/envs/cosmo_env/lib/python3.6/site-packages/bokeh/document.py", line 737, in _notify_change
    self._trigger_on_change(ModelChangedEvent(self, model, attr, old, new, serializable_new, hint, setter))
  File ".../anaconda3/envs/cosmo_env/lib/python3.6/site-packages/bokeh/document.py", line 721, in _trigger_on_change
    self._with_self_as_curdoc(invoke_callbacks)
  File ".../anaconda3/envs/cosmo_env/lib/python3.6/site-packages/bokeh/document.py", line 703, in _with_self_as_curdoc
    return f()
  File ".../anaconda3/envs/cosmo_env/lib/python3.6/site-packages/bokeh/document.py", line 720, in invoke_callbacks
    cb(event)
  File ".../anaconda3/envs/cosmo_env/lib/python3.6/site-packages/bokeh/document.py", line 683, in <lambda>
    self._callbacks[receiver] = lambda event: event.dispatch(receiver)
  File ".../anaconda3/envs/cosmo_env/lib/python3.6/site-packages/bokeh/document.py", line 126, in dispatch
    super(ModelChangedEvent, self).dispatch(receiver)
  File ".../anaconda3/envs/cosmo_env/lib/python3.6/site-packages/bokeh/document.py", line 111, in dispatch
    receiver._document_patched(self)
  File ".../anaconda3/envs/cosmo_env/lib/python3.6/site-packages/bokeh/server/session.py", line 170, in _document_patched
    raise RuntimeError("_pending_writes should be non-None when we have a document lock, and we should have the lock when the document changes")
RuntimeError: _pending_writes should be non-None when we have a document lock, and we should have the lock when the document changes
[1]    86891 abort      cosmos qt
[0312/162744:ERROR:mach_port_broker.mm(43)] bootstrap_look_up: Unknown service name (1102)