Regression in paths without hosts in v2.1.1 vs v2.1.0

[russelltg]

The code

println!("{:?}", url::Url::parse("udp://:2223"));

Prints Ok("udp://:2223/") in v2.1.0, but now prints Err(EmptyHost) in v2.1.1. Is this an intended change? Is there any way I can get it to parse these hostless urls?

[bstrie]

I'm no expert, but I believe this is the intended behavior of adhering to the URL specification. I think the relevant section is https://url.spec.whatwg.org/#hostname-state , and if I'm correct this URL is hitting the following condition:

• Otherwise, if c is U+003A (:) and the [] flag is unset, then:
  • If buffer is the empty string, validation error, return failure.

[djc]

Yeah, I guess this is intended behavior. It also seems fairly reasonable, so I'll close this issue. Feel free to reopen if you disagree and have a better plan of action!