Odd corner case of InvalidURIError

[egonSchiele]

The following code:
Addressable::URI.join "http://www.good.is/post/sponsored-post-how-corporations-are-harnessing-the-power-of-renewable-energy/", "//"

Gives:
Absolute URI missing hierarchical segment: 'http://' (Addressable::URI::InvalidURIError)

This doesn't happen with any of the following:
Addressable::URI.join "http://www.good.is/post/sponsored-post-how-corporations-are-harnessing-the-power-of-renewable-energy/", "/"
Addressable::URI.join "http://www.good.is/post/sponsored-post-how-corporations-are-harnessing-the-power-of-renewable-energy/", "/?a"
Addressable::URI.join "http://www.good.is/post/sponsored-post-how-corporations-are-harnessing-the-power-of-renewable-energy/", "///"

[sporkmonger]

Yeah, this definitely looks like a problem. Could you try to produce a more condensed test-case that duplicates the issue? Basically, I need the simplest URI that fails in this manner.

[sporkmonger]

Wait, no... actually I didn't look at this closely enough. This is working very much as intended. You've probably just misunderstood what's actually happening here.

That function is equivalent to this:

Addressable::URI.parse("http://example.com/") + Addressable::URI.parse("//")

That second URI resolves to a network-path reference with a host and path of "". This essentially means that the joined URI resolves to "http://", which is not a valid URI. However, the other examples you gave resolve to valid URIs: "http://example.com/", "http://example.com/?a", and "http:///" respectively.

Closing this issue.