Addressable::URI::InvalidURIError (Hostname not supplied: '') when using omit

[noff]

Hello. Here is an example:

Addressable::URI.parse("https://user:password@dev.domain.com").omit(:scheme, :port, :user, :password, :host)
Traceback (most recent call last):
        1: from (irb):22
Addressable::URI::InvalidURIError (Hostname not supplied: '')

It raises only with omit method.

When try to parse URL and use an object, everything works great:

u = Addressable::URI.parse("https://user:password@dev.domain.com").
u.path
=> ""

[dentarg]

@noff what version of Addressable are you using?

[noff]

addressable (~> 2.3, >= 2.3.8)

[noff]

Just updated to addressable (2.7.0), same issue

[dentarg]

Addressable::URI.parse("https://user:password@dev.domain.com").omit(:scheme, :port, :user, :password, :host)

@noff what do you expect this to return?

This?

irb(main):009:0> Addressable::URI.parse("")
=> #<Addressable::URI:0x168 URI:>

---

Tested this myself with a few variants, seems to only trigger with username/password in the URL

irb(main):016:0> Addressable::URI.parse("https://foo.com").omit(:scheme)
=> #<Addressable::URI:0x1e0 URI://foo.com>
irb(main):017:0> Addressable::URI.parse("https://foo.com").omit(:scheme, :host)
=> #<Addressable::URI:0x1f4 URI:>
irb(main):018:0> Addressable::URI.parse("https://foo.com").omit(:scheme, :port, :host)
=> #<Addressable::URI:0x208 URI:>
irb(main):019:0> Addressable::URI.parse("https://foo.com").omit(:scheme, :port, :user, :host)
=> #<Addressable::URI:0x21c URI:>
irb(main):020:0> Addressable::URI.parse("https://foo.com").omit(:scheme, :port, :user, :password, :host)
=> #<Addressable::URI:0x230 URI:>
irb(main):021:0> Addressable::URI.parse("https://foo@foo.com").omit(:scheme, :port, :user, :password, :host)
=> #<Addressable::URI:0x244 URI:>
irb(main):022:0> Addressable::URI.parse("https://foo:bar@foo.com").omit(:scheme, :port, :user, :password, :host)
Traceback (most recent call last):
        7: from /Users/dentarg/.rubies/ruby-2.7.3/bin/irb:23:in `<main>'
        6: from /Users/dentarg/.rubies/ruby-2.7.3/bin/irb:23:in `load'
        5: from /Users/dentarg/.rubies/ruby-2.7.3/lib/ruby/gems/2.7.0/gems/irb-1.2.6/exe/irb:11:in `<top (required)>'
        4: from (irb):22
        3: from /Users/dentarg/.gem/ruby/2.7.3/gems/addressable-2.8.0/lib/addressable/uri.rb:2327:in `omit'
        2: from /Users/dentarg/.gem/ruby/2.7.3/gems/addressable-2.8.0/lib/addressable/uri.rb:2421:in `defer_validation'
        1: from /Users/dentarg/.gem/ruby/2.7.3/gems/addressable-2.8.0/lib/addressable/uri.rb:2483:in `validate'
Addressable::URI::InvalidURIError (Hostname not supplied: '')

---

I wonder if this is a similar bug? (similar error as in #272)

irb(main):015:0> Addressable::URI.parse("https://foo.com").omit(:host)
Traceback (most recent call last):
        7: from /Users/dentarg/.rubies/ruby-2.7.3/bin/irb:23:in `<main>'
        6: from /Users/dentarg/.rubies/ruby-2.7.3/bin/irb:23:in `load'
        5: from /Users/dentarg/.rubies/ruby-2.7.3/lib/ruby/gems/2.7.0/gems/irb-1.2.6/exe/irb:11:in `<top (required)>'
        4: from (irb):15
        3: from /Users/dentarg/.gem/ruby/2.7.3/gems/addressable-2.8.0/lib/addressable/uri.rb:2327:in `omit'
        2: from /Users/dentarg/.gem/ruby/2.7.3/gems/addressable-2.8.0/lib/addressable/uri.rb:2421:in `defer_validation'
        1: from /Users/dentarg/.gem/ruby/2.7.3/gems/addressable-2.8.0/lib/addressable/uri.rb:2476:in `validate'
Addressable::URI::InvalidURIError (Absolute URI missing hierarchical segment: 'https:')

[noff]

@dentarg
It will be great if omit host won't raise error. Like this:

Addressable::URI.parse("https://foo.com/mypath").omit(:host).path
=> "/mypath"