Traceback (most recent call last):


 "qtlib\table.py", line 85, in data


 "qt\results_model.py", line 39, in _getData


 "core\gui\result_table.py", line 43, in is_cell_delta
AttributeError: 'NoneType' object has no attribute 'get_display_info'


Traceback (most recent call last):


 "/tmp/foo/venv/lib/python3.5/site-packages/behave/model.py", line 1456, in run

match.run(runner.context)


 "/tmp/foo/venv/lib/python3.5/site-packages/behave/model.py", line 1903, in run

self.func(context, *args, **kwargs)


 "features/steps/example_steps.py", line 8, in step_impl

sys.stdout.buffer.write(b'foo\n')

AttributeError: '_io.StringIO' object has no attribute 'buffer'
