[WIP] Testing python 3 issue

[tonybaloney]

Try and recreate the Python 3 crash in a test.

Summary of the problem:

• Occurs when Python 3 is the runtime executing the retox module
• Occurs in the refresh method of asciimatics
• Does not happen in py27,py36 environments, only on pylint or lint.
• Normally happens when tests are re-run and related to the finishing of jobs

[codecov-io]

Codecov Report

Merging #12 into master will increase coverage by 49.8%.
The diff coverage is 66.66%.

@@            Coverage Diff             @@
##           master      #12      +/-   ##
==========================================
+ Coverage   30.33%   80.14%   +49.8%     
==========================================
  Files          10       10              
  Lines         422      428       +6     
==========================================
+ Hits          128      343     +215     
+ Misses        294       85     -209

Impacted Files	Coverage Δ
retox/service.py	82.52% <100%> (+60.95%)	⬆️
retox/__init__.py	100% <100%> (ø)	⬆️
retox/__main__.py	56.47% <50%> (+25.22%)	⬆️
retox/log.py	76.31% <0%> (+7.89%)	⬆️
retox/reporter.py	88.13% <0%> (+55.93%)	⬆️
retox/proclimit.py	57.14% <0%> (+57.14%)	⬆️
retox/ui.py	93.16% <0%> (+70.08%)	⬆️
retox/exclude.py	100% <0%> (+100%)	⬆️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 4eaef48...74f2456. Read the comment docs.

[tonybaloney]

Here is the stack trace of the issue

!!!!!! Process crash !!!!!!!
Traceback (most recent call last):
  File "/Users/anthonyshaw/repo/retox-3/retox/log.py", line 12, in wrapper
    return f(*args, **kwds)
  File "/Users/anthonyshaw/repo/retox-3/retox/reporter.py", line 78, in logaction_finish
    self.env_frames[action.venv.name].stop(action.activity, action)
  File "/Users/anthonyshaw/repo/retox-3/retox/ui.py", line 259, in stop
    self.refresh()
  File "/Users/anthonyshaw/repo/retox-3/retox/ui.py", line 59, in refresh
    self._screen.refresh()
  File "/Users/anthonyshaw/repo/retox-3/lib/python3.6/site-packages/asciimatics/screen.py", line 2126, in refresh
    super(_CursesScreen, self).refresh()
  File "/Users/anthonyshaw/repo/retox-3/lib/python3.6/site-packages/asciimatics/screen.py", line 1217, in refresh
    self._print_at(new_cell[0], x, y, new_cell[4])
  File "/Users/anthonyshaw/repo/retox-3/lib/python3.6/site-packages/asciimatics/screen.py", line 2256, in _print_at
    self._safe_write(cursor + text)
  File "/Users/anthonyshaw/repo/retox-3/lib/python3.6/site-packages/asciimatics/screen.py", line 2084, in _safe_write
    sys.stdout.write(msg)
  File "/Users/anthonyshaw/repo/retox-3/bin/../lib/python3.6/codecs.py", line 377, in write
    self.stream.write(data)
  File "/Users/anthonyshaw/repo/retox-3/bin/../lib/python3.6/codecs.py", line 376, in write
    data, consumed = self.encode(object, self.errors)
TypeError: utf_8_encode() argument 1 must be str, not bytes