* Fix off-by-one error on `leading_zeros` which was used to index in the hash to get leading zeros when not aligned on byte boundary (i.e, all the bits in a byte was not zero such as 0001 1111) * Fix overflow by shifting with bigger value than 63
* Fix off-by-one error on `leading_zeros` which was used to index in the hash to get leading zeros when not aligned on byte boundary (i.e, all the bits in a byte was not zero such as 0001 1111) * Fix overflow by shifting with bigger value than 63