Quoting from S02:

Initial 0 no longer indicates octal numbers. You must use an explicit radix marker for that. Pre-defined radix prefixes include:

    0b          base 2, digits 0..1
    0o          base 8, digits 0..7
    0d          base 10, digits 0..9
    0x          base 16, digits 0..9,a..f (case insensitive)