New submission from Tyler Yep :
The following code crashes when I try to run it, even though it passes when I
use `from typing import Callable` instead.
```
from collections.abc import Callable
from typing import Any, TypeVar
V = TypeVar("V")
Function = Callable[[list[V], V, V], float]
def random_fn(fn: Function[Any]) -> Function[Any]:
return fn
```
--
messages: 385511
nosy: tyler.yep
priority: normal
severity: normal
status: open
title: No type variables left in collections.abc.Callable
type: crash
versions: Python 3.9
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<https://bugs.python.org/issue43004>
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