Function releasebufferproc 

pub unsafe extern "C" fn releasebufferproc<Meth: MethodDef<Func>>(
    slf: *mut PyObject,
    buf: *mut Py_buffer,
)

Available on non-Py_LIMITED_API or Py_3_11 only.

Releasebufferproc is a special case where the function cannot return an error, so we use trampoline_unraisable.

Safety

• It must be sound to call the method with slf and buf
• Interpreter must be attached