Space in windows username creates UnicodeDecodeError

[pw-simon]

I freshly installed rez 2.112.0 with also fresh python 3.10.11.
When I run rez-env in the command line I get the following errors:

Exception in thread Thread-3 (_readerthread):
Traceback (most recent call last):
  File "C:\Python310\lib\threading.py", line 1016, in _bootstrap_inner
    self.run()
  File "C:\Python310\lib\threading.py", line 953, in run
    self._target(*self._args, **self._kwargs)
  File "C:\Python310\lib\subprocess.py", line 1515, in _readerthread
    buffer.append(fh.read())
  File "C:\Python310\lib\codecs.py", line 322, in decode
    (result, consumed) = self._buffer_decode(data, self.errors, final)
UnicodeDecodeError: 'utf-8' codec can't decode byte 0xa0 in position 124: invalid start byte
Traceback (most recent call last):
  File "C:\Python310\lib\runpy.py", line 196, in _run_module_as_main
    return _run_code(code, main_globals, None,
  File "C:\Python310\lib\runpy.py", line 86, in _run_code
    exec(code, run_globals)
  File "C:\opt\rez\Scripts\rez\rez-env.exe\__main__.py", line 7, in <module>
  File "c:\opt\rez\lib\site-packages\rez\cli\_entry_points.py", line 148, in run_rez_env
    return run("env")
  File "c:\opt\rez\lib\site-packages\rez\cli\_main.py", line 191, in run
    returncode = run_cmd()
  File "c:\opt\rez\lib\site-packages\rez\cli\_main.py", line 183, in run_cmd
    return func(opts, opts.parser, extra_arg_groups)
  File "c:\opt\rez\lib\site-packages\rez\cli\env.py", line 251, in command
    returncode, _, _ = context.execute_shell(
  File "c:\opt\rez\lib\site-packages\rez\resolved_context.py", line 1045, in _check
    return fn(self, *nargs, **kwargs)
  File "c:\opt\rez\lib\site-packages\rez\resolved_context.py", line 1431, in execute_shell
    self._execute(executor)
  File "c:\opt\rez\lib\site-packages\rez\utils\memcached.py", line 271, in wrapper
    return func(*nargs, **kwargs)
  File "c:\opt\rez\lib\site-packages\rez\resolved_context.py", line 2121, in _execute
    executor.append_system_paths()
  File "c:\opt\rez\lib\site-packages\rez\rex.py", line 1341, in append_system_paths
    for path in sh.get_syspaths():
  File "c:\opt\rez\lib\site-packages\rezplugins\shell\cmd.py", line 87, in get_syspaths
    cls.syspaths = get_syspaths_from_registry()
  File "c:\opt\rez\lib\site-packages\rezplugins\shell\_utils\windows.py", line 103, in get_syspaths_from_registry
    out_ = out_.strip()
AttributeError: 'NoneType' object has no attribute 'strip'

Printing out the entry variable I get this:
{'cmd': ['REG', 'QUERY', 'HKCU\\Environment', '/v', 'PATH'], 'expected': 'HKEY_CURRENT_USER\\\\Environment[\\s]+PATH[\\s]+REG_(EXPAND_)?SZ[\\s]+(.*)'}
If I'm not mistaken, the error comes from the fact, that my Windows username (HKEY_CURRENT_USER) contains a space character (0xa0, NBSP), which then generates the UnicodeDecodeError, which then goes on and creates the AttributeError.

I might also add, that this is not a custom made or renamed folder. This was made by Windows by default, so I think this issue might affect more people.

Environment

• OS: Windows 10
• Rez version: 2.112.0
• Rez python version: 3.10.11

To Reproduce

1. Have a space character in the current windows user's name
2. Start a cmd
3. Run rez-env

Expected behavior
Starting a new rez-env.

Actual behavior
Error as seen above.

[JeanChristopheMorinPerso]

To me the error says it all. That type of space is not supported. Of I'm not mistaken, 0xa0 is a non standard space right? @instinct-vfx any opinion?