exit status: 1 with stderr:
<stdin>:2:24: error: referencing operator function '<' on 'BinaryInteger' requires that 'ClosedRange<Int>.Index' conform to 'BinaryInteger' print(range.startIndex < 0) ^ Swift.BinaryInteger:1:11: note: where 'Self' = 'ClosedRange<Int>.Index' extension BinaryInteger { ^