Broken in Python 3.9 due to copy.deepcopy() no longer working on uname_result objects

[rocallahan]

See https://bugs.python.org/issue42189.

I guess you could either work around this or wait to see if Python 3.9 is fixed. In the meantime Xed won't build on platforms that are shipping Python 3.9 (e.g. Fedora 33).

[rocallahan]

I'm working around it with https://github.com/rocallahan/mbuild/commit/b4580b926df935b04ceb62d3682e66584bdc72c9

[markcharney]

thx fir reporting this. i will take a look

[markcharney]

confirmed bug on python3.9. thx for the suggested fix.

>> import copy
>>> import platform
>>> a=platform.uname()
>>> b=copy.deepcopy(a)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/copy.py", line 172, in deepcopy
    y = _reconstruct(x, memo, *rv)
  File "/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/copy.py", line 264, in _reconstruct
    y = func(*args)
  File "/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/copyreg.py", line 91, in __newobj__
    return cls.__new__(cls, *args)
TypeError: <lambda>() takes 6 positional arguments but 7 were given

[markcharney]

I looked at overriding deepcopy but decided to go with just making my own copy-able tuple based on the platform.uname() return value. I will be doing push shortly.

[markcharney]

let me know if this works for you. thx for reporting this issue.