I've used afl.rs to heavily test url2.2.0, and some slicing error may occured when specific input is provided.
To replay the panic, the test code is

let mut _local1 = url::Url::parse("arhttpsps:/.//eom/dae.com/\\\\t\\:").unwrap();
let _ = url::quirks::set_hostname(&mut _local1 ,"//eom/datcom/\\\\t\\://eom/data.cs");

I also placed the replay file at https://github.com/StevenJiang1110/afl_rust_crashes/tree/main/url/replay_url40
I hope you will check if this is an actually bug. Thanks a lot.
The simple bug report is like this.