Error with mixing str and pathlib.Path in command line arguments list

Bug Report

mypy raises error if list of command line arguments (passing to subprocess.call) contains items of different types (for example, str and pathlib.Path). It can be fixed by adding type hint to variable, but it's too annoying.

To Reproduce

import pathlib
import subprocess

cmd = [pathlib.Path('bash'), '-c', 'echo Hello']
subprocess.call(cmd)

Expected Behavior

mypy should not raise any error.

Actual Behavior

main.py:5: error: Argument 1 to "check_call" has incompatible type "List[object]"; expected "Union[Union[str, bytes, PathLike[str], PathLike[bytes]], Sequence[Union[str, bytes, PathLike[str], PathLike[bytes]]]]"
Found 1 error in 1 file (checked 1 source file)

Why can't mypy recognize cmd type as List[Union[pathlib.Path, str]], not List[object]?

Environment

• Mypy version used: 0.961
• Python version used: 3.10
• Operating system: Linux

Comience con el reproductor de Python proporcionado y el tipado de subprocess.call; después, siga cómo mypy infiere el tipo de una lista mixta que contiene pathlib.Path y str. Confirme el cambio con una prueba de regresión que use la lista de argumentos de línea de comandos mostrada y verifique que mypy no informe ningún error, mientras las comprobaciones existentes de argumentos de subprocess sigan intactas.