Callable does not accept functions/types where call variants match the interface

[NiklasRosenstein]

Bug Report

MyPy won't allow me to pass built-ins like sorted, set or list to a t.Callable[[T], R] argument.

To Reproduce

import typing as t

T = t.TypeVar('T')
R = t.TypeVar('R')
Collector = t.Callable[[t.Iterable[T]], R]

def collect(it: t.Iterable[T], collector: Collector[T, R]) -> R:
  return collector(it)

collect(['str'], sorted)  # Argument 2 to "collect" has incompatible type overloaded function; expected "Callable[[Iterable[str]], List[SupportsLessThanT]]"
collect(['str'], set)     # Argument 2 to "collect" has incompatible type "Type[Set[Any]]"; expected "Callable[[Iterable[str]], Set[_T]]"
collect(['str'], list)    # Argument 2 to "collect" has incompatible type "Type[List[Any]]"; expected "Callable[[Iterable[str]], List[_T]]"

Expected Behavior

MyPy accepts the above code.

Actual Behavior

MyPy complains about type errors (as shown in the comments in the example)

You can work around this by wrapping the built-in in a lambda:

collect(['str'], lambda x: sorted(x))
collect(['str'], lambda x: set(x))
collect(['str'], lambda x: list(x))

Your Environment

• Mypy version used: 0.812
• Mypy command-line flags: mypy test.py
• Mypy configuration options from mypy.ini (and other config files): n/a
• Python version used: 3.8.5
• Operating system and version: WSL2 Ubuntu 20