[Bug 47787] New: Path maniplation bug in cpython 3.5/3.6 but not 3.7

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=47787

Bug ID: 47787
           Summary: Path maniplation bug in cpython 3.5/3.6 but not 3.7
           Product: Wine
           Version: 4.16
          Hardware: x86
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: -unknown
          Assignee: [e-mail]
          Reporter: [e-mail]
      Distribution: ---

Bug reported by Sebastian M. Ernst on wine-devel mail list.

Found one more odd thing and it might be closely related (if not the
same bug). I tested different versions of CPython for Windows on Wine
4.14 and noticed that pytest (a Python test library) was somehow broken
on CPython 3.5 and 3.6 but not on CPython 3.7. It can also be traced
back to path manipulation:

# CPython 3.5.4
user@comp:/path/to/target> wine python.exe -c "from pathlib import Path;
print(Path('.').resolve())"
Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "pathlib.py", line 1109, in resolve
  File "pathlib.py", line 186, in resolve
FileNotFoundError: [WinError 2] Datei nicht gefunden: '.'

# CPython 3.6.3
user@comp:/path/to/target> wine python.exe -c "from pathlib import Path;
print(Path('.').resolve())"
.

# CPython 3.7.4
user@comp:/path/to/target> wine python.exe -c "from pathlib import Path;
print(Path('.').resolve())"
Z:\path\to\target

CPython 3.7 is correctly resolving the path '.' while CPython 3.5 and
3.6 fail in different ways. All three examples work correctly on Windows
10. "Datei nicht gefunden" translates to "file not found".

If any one wants to take this bug. Please assign it. Thanks.