pyserial throws exception when creating serial port

Description

A strange exception is produced when trying to use pyserial on windows. The same version of pyserial works correctly on the official python implementation.

Is this because of pyserial using ctypes? I see that numpy is not supported because it is implemented in C.

(.venv) C:\Users\barabas\snip>ipy
IronPython 3.4.0b1 (3.4.0.0010)
[.NETFramework,Version=v4.6 on .NET Framework 4.8.4470.0 (64-bit)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> import serial
>>> serial.Serial("COM4")
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "C:\Users\barabas\snip\.venv\lib\site-packages\serial\serialwin32.py", line 33, in __init__
  File "C:\Users\barabas\snip\.venv\lib\site-packages\serial\serialutil.py", line 244, in __init__
TypeError: expected int or long, got bool

The lines are:

    def __init__(self, *args, **kwargs):
        self._port_handle = None
        self._overlapped_read = None
        self._overlapped_write = None
        super(Serial, self).__init__(*args, **kwargs) # here

and

        if port is not None:
            self.open() # here        

Steps to Reproduce

1. Install pyserial==3.5, IronPython 3.4.0b1 on Windows
2. Connect a USB to serial adapter
3. Start ipy and run the commands from above

Expected behavior: Serial port is created

Actual behavior: Exception thrown

Versions

You can get this information from executing ipy -V.

IronPython 3.4.0b1

pip freeze:

pyserial==3.5
robotframework==4.1.3
typing==3.10.0.0