Jedi make Error with completing for python on Windows and MSYS2

[lianghao13]

Imformation: vim:8.0.1766(gvim on Windows) python:3.6.4(on Windows)/3.6.2(on MSYS2)

Debug Info

• 2018-05-09 12:56:38,030 [ERROR][C:\DevTool\msys64\home\lianghao13.vim\bundle\completor.vim\pythonx\completers\python__init__.py] Expecting value: line 1 column 1 (char 0)
• Traceback (most recent call last):
• File "C:\DevTool\msys64\home\lianghao13.vim\bundle\completor.vim\pythonx\completers\python__init__.py", line 53, in on_complete
• items = json.loads(data)
• File "C:\DevTool\Python36\Lib\json__init__.py", line 354, in loads
• return _default_decoder.decode(s)
• File "C:\DevTool\Python36\Lib\json\decoder.py", line 339, in decode
• obj, end = self.raw_decode(s, idx=_w(s, 0).end())
• File "C:\DevTool\Python36\Lib\json\decoder.py", line 357, in raw_decode
• raise JSONDecodeError("Expecting value", s, err.value) from None
• json.decoder.JSONDecodeError: Expecting value: line 1 column 1 (char 0)

My thinking of this problem

1. I uninstall the python(3.6.2) on MSYS2,The completor plug and Jedi works well.
2. Reinstall the python on MSYS2 again, follow the introduction on the home page of TheJedi,i found the Error like this issure (Completions fails in 0.12.0 #1113 https://github.com/davidhalter/jedi/issues/1113 ). Maybe On the Windows Jedi Use the python in the PATH of Host(like 3.6.4),but sometimes it will call the python on MSYS2(like 3.6.2), it make errors.