robotframework运行时后台报错UnicodeDecodeError: 'utf8' codec can't decode byte 0xb8 in position 0: invalid

最近运行rf的用例时后台总报错

Traceback (most recent call last):
  File "C:\Python27\lib\site-packages\robotide\contrib\testrunner\testrunnerplugin.py", line 370, in OnTimer
    self._test_runner.get_output_and_errors(self.get_current_profile())
  File "C:\Python27\lib\site-packages\robotide\contrib\testrunner\testrunner.py", line 250, in get_output_and_errors
    stdout, stderr, returncode = self._process.get_output(), \
  File "C:\Python27\lib\site-packages\robotide\contrib\testrunner\testrunner.py", line 305, in get_output
    return self._output_stream.pop()
  File "C:\Python27\lib\site-packages\robotide\contrib\testrunner\testrunner.py", line 400, in pop
    return result.decode('UTF-8')
  File "C:\Python27\lib\encodings\utf_8.py", line 16, in decode
    return codecs.utf_8_decode(input, errors, True)
UnicodeDecodeError: 'utf8' codec can't decode byte 0xb8 in position 0: invalid start byte

对于python2.7的各种编码问题，我真的是头痛，非常怀恋3.5。可惜，无论怎么怀恋，用例还得继续写。
先找到报错的文件:
C:\Python27\lib\site-packages\robotide\contrib\testrunner\testrunner.py
删掉pyc文件（这个步骤不可省略，不然改了也没用）

然后将编码方式从utf-8改成GBK

重启ride，不再报错