mypyc crashes with ParamSpec

[kasium]

I did my first try with mypyc but it directly crashes when I use ParamSpec

To Reproduce

from __future__ import annotations
from typing import Any, Callable, TypeVar, ParamSpec

PARAM = ParamSpec("PARAM")
RET = TypeVar("RET")

def decorator() -> Callable[[Callable[PARAM, RET]], Callable[PARAM, RET]]:
 def _wrapper(function: Callable[PARAM, RET]) -> Callable[PARAM, RET]:
 def _inner(*args: PARAM.args, **kwargs: PARAM.kwargs) -> Any:
 return function(*args, **kwargs)

 return _inner

 return _wrapper

Expected Behavior
Works

Actual Behavior

Traceback (most recent call last):
 File "mypyc/irbuild/builder.py", line 265, in accept
 File "mypy/nodes.py", line 774, in accept
 File "mypyc/irbuild/visitor.py", line 179, in visit_func_def
 File "mypyc/irbuild/function.py", line 98, in transform_func_def
 File "mypyc/irbuild/function.py", line 275, in gen_func_item
 File "mypyc/irbuild/env_class.py", line 102, in load_env_registers
 File "mypyc/irbuild/env_class.py", line 179, in add_args_to_env
 File "mypyc/irbuild/env_class.py", line 165, in num_bitmap_args
 File "mypyc/irbuild/builder.py", line 1236, in type_to_rtype
 File "mypyc/irbuild/mapper.py", line 143, in type_to_rtype
foo.py:11: AssertionError: unexpected type <class 'mypy.types.ParamSpecType'>

Your Environment

• Mypy version used: 1.3.0
• Mypy command-line flags: n/a
• Mypy configuration options from mypy.ini (and other config files): n/a
• Python version used: 3.11.0

[ilevkivskyi]

The original example works on master, likely fixed by #15837