Bug Report

seems dmypy is unable to suggest an annotation when a function is decorated even with a trivial decorator (likely as the implementation predates widespread ParamSpec usage)

I believe the fix is deleting this line?

To Reproduce

from typing import Callable

def dec[R, **P](f: Callable[P, R]) -> Callable[P, R]:
    return f

@dec
def f():
    print('hello world')

[mypy]
check_untyped_defs = true

Expected Behavior

$ dmypy check .
...
$ dmypy suggest t.f
() -> None

Actual Behavior

$ dmypy check .
...
$ dmypy suggest t.f
Object t.f is a decorator we can't handle

Your Environment

• Mypy version used: 1.15.0
• Mypy command-line flags: (see above)
• Mypy configuration options from mypy.ini (and other config files): (see above)
• Python version used: 3.13.1