alt Hacker NewsAnother case many integer parsing functions get wrong is that they interpret a leading 0 as an octal indicator.
That should be opt-in via a flag, if it needs to be supported at all. Unix file permissions are the only deliberate use of octal I've ever seen.
It used to be much more common. In the 70s there was a lot of collective hesitance to use hex with its strange letter digits. Octal was the compact representation of choice.