False positive with assignment expression shadowing a builtin

[eltoder]

To Reproduce

https://mypy-play.net/?mypy=latest&python=3.11&gist=a7fd112a423a2e565e5f2cd3e3607e58

def foo(x: int) -> int:
    res = vars + 1 if (vars := x) else 0
    return res

Expected Behavior

This should type check without errors. It does if I rename vars to anything that is not a name of a built-in.

Actual Behavior

main.py:2: error: Unsupported operand types for + (overloaded function and "int")  [operator]

Your Environment

• Mypy version used: 1.5.1
• Mypy command-line flags: no
• Mypy configuration options from mypy.ini (and other config files): no
• Python version used: 3.11