Environment
OS: Windows
Cython version: 3.0.0a9
Python version: 3.10 (the same setup with 3.9 doesn't have this problem)

To reproduce
setup.py:

from setuptools import setup, Extension
from Cython.Build import cythonize
extensions = [Extension("a", ["a.pyx"], language='c++', extra_compile_args=["/WX"])]
setup(ext_modules=cythonize(extensions, compiler_directives={'language_level': "3"}))

a.pyx

def f():
    cdef float[:] data

I execute the following: python setup.py build_ext --inplace

Expected behavior
A .pyd file is generated.

Actual behavior
The compiler fails with the following messages:

a.cpp(21102): error C2220: the following warning is treated as an error
a.cpp(21102): warning C4551: function call missing argument list

Line 21102 contains:

(void)__Pyx_PyObject_CallMethod0;

(details about the warning are here)