Flag Iterable is inferred as Iterable[builtins.object] instead of the actual class name

[sebdivinity]

Bug Report

Mypy infers that iter on Flag return an Iterable of builtins.object instead of the class name.

To Reproduce

from enum import Flag, auto

class Test(Flag):
    A = auto()
    B = auto()
    C = auto()

reveal_type(set(Test))

https://mypy-play.net/?mypy=latest&python=3.11&gist=0533e027a9f70660afa932e59c9d553d

Expected Behavior

main.py:10: note: Revealed type is "builtins.set[Test]"

Actual Behavior

main.py:10: note: Revealed type is "builtins.set[builtins.object]"

Your Environment

• Mypy version used: 1.1.1
• Mypy command-line flags: None
• Mypy configuration options from mypy.ini (and other config files): None
• Python version used: 3.11.2