LSP: TypeError: can't concat bytes to str

I am not sure how to reproduce, but I have enabled debug and this popped some time after:

:
2018-01-20 23:03:54,977 parso.python.diff diff parser start:
2018-01-20 23:03:54,978 parso.python.diff diff parser calculated:
2018-01-20 23:03:54,979 parso.python.diff diff: line_lengths old: 66, new: 66:
2018-01-20 23:03:54,979 parso.python.diff diff equal old[1:32] new[1:32]:
2018-01-20 23:03:54,980 parso.python.diff diff actually copy 1 to 7:
2018-01-20 23:03:55,013 parso.python.diff parse_part from 8 to 33 (to 33 in part parser):
2018-01-20 23:03:55,013 parso.python.diff diff replace old[33:33] new[33:33]:
2018-01-20 23:03:55,014 parso.python.diff diff equal old[34:66] new[34:66]:
2018-01-20 23:03:55,016 parso.python.diff parse_part from 34 to 34 (to 34 in part parser):
2018-01-20 23:03:55,017 parso.python.diff diff actually copy 35 to 65:
2018-01-20 23:03:55,018 parso.python.diff diff parser end:
2018-01-20 23:03:55,219 parso.cache pickle loaded: d:\user\dropbox\softwareversioning\pycodestyle\pycodestyle.py:
2018-01-20 23:03:55,289 pyls.config.config   finish pyls_hover --> [hook]:
Exception in thread Thread-112:
Traceback (most recent call last):
  File "./python3.3/threading.py", line 901, in _bootstrap_inner
  File "./python3.3/threading.py", line 858, in run
  File "F:\SublimeText\Data\Packages\LSP\plugin\core\rpc.py", line 164, in read_stderr
    server_log(decoded.strip())
  File "F:\SublimeText\Data\Packages\LSP\plugin\core\logging.py", line 18, in server_log
    printf(*args, prefix=binary)
  File "F:\SublimeText\Data\Packages\LSP\plugin\core\logging.py", line 23, in printf
    print(prefix + ":", *args)
TypeError: can't concat bytes to str

Perhaps use print(prefix + ":", str(*args)) so we can know what it was trying to print?