This panic only happened in debug builds because of a left shift overflow. The slice range has bounds between 0 and 128. The 128 case caused the overflow. We now do an unbounded shift and a wrapped sub to get the correct bitmask. If the slice range is 128 left, it should make 1 zero. Then the wrapped sub would flip all bits, which is expected behavior. Release Notes: - N/A Co-authored-by: Nia <nia@zed.dev>