let someFunction () = let v: Vector<byte>= Vector(0uy) let array:byte[] = [||] let span: Span<byte>= Span(array) v.CopyTo(span) Compiler error v.CopyTo(span) ----^^^^^^^^^^^^^^
/home/muqiu/stdin(99,5): error FS0041: A unique overload for method 'CopyTo' could not be determined based on type information prior to this program point. A type annotation may be needed.