[BUG] Compilation of generated .c file fails for inline method with fused type

[skunkyevil]

Describe the bug

Getting error C2040 from cl while compiling generated .c file.

Code to reproduce the behaviour:

cimport numpy as cnp

ctypedef fused scalar_or_array:
    long
    cnp.ndarray[long]

cdef class A:
    cdef inline scalar_or_array meth(self, scalar_or_array x):
        return x

If I replace cnp.ndarray[long] with double, I get error C2371 instead of C2040.

I can get rid of error if I make the method not inline. Or if I remove one of types in scalar_or_array definition (any one).

Expected behaviour

I hope inline methods with fused types should work. Or at least provide a clear error description on pyx->c phase.

Environment

OS: Windows 10
Python version 3.9
Cython version 3.0.0a11

Additional context

No response