Bug Report

Hey everyone, thanks for all the great work on mypy!

I ran into an issue where mypy does not warn if 2 ParamSpecs need to align but they don't. Hard to describe, so here's an example:

To Reproduce

from collections.abc import Callable
from typing import ParamSpec

P = ParamSpec("P")

def foo(cb1: Callable[P, None], cb2: Callable[P, None]) -> None:
    pass
  
def my_callback_1(x: int) -> None:
    pass

def my_callback_2(x: str) -> None:
    pass

foo(my_callback_1, my_callback_2)

Playground link: https://mypy-play.net/?mypy=latest&python=3.12&flags=strict&gist=f2fac01dde7a953c5dec5117428350f6

Expected Behavior

I think mypy should error out on the foo() call since it's not possible to resolve both Callables to a common ParamSpec P.

When I put the same code into VSCode, pylance reports the following error:

Argument of type "(x: str) -> None" cannot be assigned to parameter "cb2" of type "(**P@foo) -> None" in function "foo"
  Type "(x: str) -> None" is not assignable to type "(x: int) -> None"
    Parameter 1: type "int" is incompatible with type "str"
      "int" is not assignable to "str"
Pylance[reportArgumentType](https://github.com/microsoft/pyright/blob/main/docs/configuration.md#reportArgumentType)

Actual Behavior

mypy does not report any issues:

Success: no issues found in 1 source file

Your Environment

See the playground link above, but when I run into this locally, I have:

• Mypy version used: mypy 1.11.2 (compiled: yes)
• Mypy command-line flags: --strict
• Mypy configuration options from mypy.ini (and other config files): None
• Python version used: Python 3.12.2