Ipv4Addr can't parse perfectly valid IP address

[gimbling-away]

I tried this code:

"0xac.000000000000000000331.0246.174".parse::<Ipv4Addr>.unwrap()

I expected to see this happen: OK

Instead, this happened: It panicked and failed.

https://play.rust-lang.org/?version=stable&mode=debug&edition=2021&gist=278845b668106e1318e431ba7c81eb47

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IP addresses can contain different representations in every chunk, the IP address is completely valid. For eg. running ping on it, is completely fine.

[ilyvion]

This is explicitly stated not to be supported in the docs:

Ipv4Addr provides a FromStr implementation. The four octets are in decimal notation, divided by . (this is called "dot-decimal notation"). Notably, octal numbers (which are indicated with a leading 0) and hexadecimal numbers (which are indicated with a leading 0x) are not allowed per IETF RFC 6943.

See also #83652

[gimbling-away]

Ah, interesting. Alright then. Closing. 👍🏻