Cannot save on Windows if file path contains "&" character

[transistorgrab]

Describe the bug

I tried to create a notebook in a folder that contains a "&" character which is obviously allowed in Windows.
The folder name is displayed as D:\Temp\test space\test&space\test_ma.py in marimo.
Windows shows it as D:\Temp\test space\test&space\test_ma.py

Marimo displays an error message:
"Failed to save" "Save handler cannot rename files."

Console output shows 'charmap' codec can't encode character '\x85' in position 84: character maps to <undefined>

marimo works when there is no "&" in the folder path.

I cannot rename the folder because this is on a shared drive where other people also have access.

"marimo env" also crashed in the console.
starting a new console gave the desired output

Environment

Windows 10, Python 3.12, marimo 0.11.2

{
  "marimo": "0.11.2",
  "OS": "Windows",
  "OS Version": "10",
  "Processor": "Intel64 Family 6 Model 154 Stepping 4, GenuineIntel",
  "Python Version": "3.12.2",
  "Binaries": {
    "Browser": "--",
    "Node": "--"
  },
  "Dependencies": {
    "click": "8.1.7",
    "docutils": "0.21.2",
    "itsdangerous": "2.2.0",
    "jedi": "0.19.1",
    "markdown": "3.7",
    "narwhals": "1.23.0",
    "packaging": "24.0",
    "psutil": "5.9.8",
    "pygments": "2.17.2",
    "pymdown-extensions": "10.14",
    "pyyaml": "6.0.1",
    "ruff": "0.9.2",
    "starlette": "0.45.2",
    "tomlkit": "0.13.2",
    "typing-extensions": "4.11.0",
    "uvicorn": "0.34.0",
    "websockets": "14.2"
  },
  "Optional Dependencies": {
    "pandas": "2.2.1"
  },
  "Experimental Flags": {}
}

Code to reproduce

import pandas

[transistorgrab]

Hi @mscolnick
I updated marimo on my machine today to 0.11.6 with pip install --upgrade marimo.
However, I still see exactly this same faulty behaviour.
When I read this correctly it should have been fixed with 0.11.3 already?
Also, I again only get errors when trying to run marimo env

D:\>marimo env
Exception in thread Thread-2 (_readerthread):
Traceback (most recent call last):
  File "C:\Users\redacted\AppData\Local\Programs\Python\Python312\Lib\threading.py", line 1073, in _bootstrap_inner
    self.run()
  File "C:\Users\redacted\AppData\Local\Programs\Python\Python312\Lib\threading.py", line 1010, in run
    self._target(*self._args, **self._kwargs)
  File "C:\Users\redacted\AppData\Local\Programs\Python\Python312\Lib\subprocess.py", line 1597, in _readerthread
    buffer.append(fh.read())
                  ^^^^^^^^^
  File "C:\Users\redacted\AppData\Local\Programs\Python\Python312\Lib\encodings\cp1252.py", line 23, in decode
    return codecs.charmap_decode(input,self.errors,decoding_table)[0]
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
UnicodeDecodeError: 'charmap' codec can't decode byte 0x81 in position 41: character maps to <undefined>
Traceback (most recent call last):
  File "<frozen runpy>", line 198, in _run_module_as_main
  File "<frozen runpy>", line 88, in _run_code
  File "C:\Users\redacted\AppData\Local\Programs\Python\Python312\Scripts\marimo.exe\__main__.py", line 7, in <module>
  File "C:\Users\redacted\AppData\Local\Programs\Python\Python312\Lib\site-packages\click\core.py", line 1157, in __call__
    return self.main(*args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\redacted\AppData\Local\Programs\Python\Python312\Lib\site-packages\click\core.py", line 1078, in main
    rv = self.invoke(ctx)
         ^^^^^^^^^^^^^^^^
  File "C:\Users\redacted\AppData\Local\Programs\Python\Python312\Lib\site-packages\click\core.py", line 1688, in invoke
    return _process_result(sub_ctx.command.invoke(sub_ctx))
                           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\redacted\AppData\Local\Programs\Python\Python312\Lib\site-packages\click\core.py", line 1434, in invoke
    return ctx.invoke(self.callback, **ctx.params)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\redacted\AppData\Local\Programs\Python\Python312\Lib\site-packages\click\core.py", line 783, in invoke
    return __callback(*args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\redacted\AppData\Local\Programs\Python\Python312\Lib\site-packages\marimo\_cli\cli.py", line 788, in env
    click.echo(json.dumps(get_system_info(), indent=2))
                          ^^^^^^^^^^^^^^^^^
  File "C:\Users\redacted\AppData\Local\Programs\Python\Python312\Lib\site-packages\marimo\_cli\envinfo.py", line 61, in get_system_info
    "Browser": get_chrome_version() or "--",
               ^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\redacted\AppData\Local\Programs\Python\Python312\Lib\site-packages\marimo\_utils\health.py", line 129, in get_chrome_version
    return get_chrome_version_windows()
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\redacted\AppData\Local\Programs\Python\Python312\Lib\site-packages\marimo\_utils\health.py", line 98, in get_chrome_version_windows
    return stdout.strip().split()[-1]
           ~~~~~~~~~~~~~~~~~~~~~~^^^^
IndexError: list index out of range

[mscolnick]

I re-opened the issue. Apologies, we have trouble testing on windows. Any chance you'd be able to help debug / write a failing tests for us, so that we can fix it?

[mscolnick]

For the env check, this PR should fix it: #3841