% ./python.exe                     Python 3.14.0a0 (heads/main-dirty:891fd12e52, May  8 2024, 09:02:37) [Clang 14.0.0 (clang-1400.0.29.202)] on darwinType "help", "copyright", "credits" or "license" for more information.>>>from typingimport*>>> T= TypeVar("T")>>> T_dflt= TypeVar("T_dflt",default=int)>>> Callable[[T_dflt], T]Traceback (most recent call last):  File "<python-input-3>", line 1, in <module>    Callable[[T_dflt], T]    ~~~~~~~~^^^^^^^^^^^^^  File "/Users/jelle/py/cpython/Lib/typing.py", line 1717, in __getitem__    return self.__getitem_inner__(params)           ~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^  File "/Users/jelle/py/cpython/Lib/typing.py", line 431, in inner    return func(*args, **kwds)  File "/Users/jelle/py/cpython/Lib/typing.py", line 1730, in __getitem_inner__    return self.copy_with(params)           ~~~~~~~~~~~~~~^^^^^^^^  File "/Users/jelle/py/cpython/Lib/typing.py", line 1702, in copy_with    return _CallableGenericAlias(self.__origin__, params,                                 name=self._name, inst=self._inst)  File "/Users/jelle/py/cpython/Lib/typing.py", line 1419, in __init__    self.__parameters__ = _collect_parameters(args)                          ~~~~~~~~~~~~~~~~~~~^^^^^^  File "/Users/jelle/py/cpython/Lib/typing.py", line 296, in _collect_parameters    raise TypeError(f'Type parameter {t!r} without a default'                    ' follows type parameter with a default')TypeError: Type parameter ~T without a default follows type parameter with a default

class X[T1=int]:    def meth[T](self, x: Callable[[T1], T]): pass