@Test
func stringUTF8SpanSpan() {
    let span = String(200).utf8Span.span
    for i in span.indices {
        if span[i] != 50 && span[i] != 48 {
            #expect(Bool(false)) // always fails in debug mode (never fails in release mode)
        }
    }
    #expect(span.indices.count == 3) // always passed
    #expect(span[0] == 50) // passes sometimes, but usually always fails
    #expect(span[1] == 48) // always fails
    #expect(span[2] == 48) // always fails
}

var string = String(200)
string.withUTF8 { buffer in }