Function nf_list_new 

#[unsafe(no_mangle)]
pub(crate) unsafe extern "C" fn nf_list_new(
    ty: &'static TypeDesc,
    items: *const Slot,
    len: usize,
) -> Slot

A list of type ty holding len items from items, which it takes ownership of.

Safety

ty is a list type and items points to len slots of its element type.