Confusing error when forgetting protocol

[brentgreeff]

Steps to Reproduce

1. Environment:
   gems/ruby-3.3.7@x/gems/uri-1.0.3

2. Steps:
   Open an Pry/IRB session.

Run:

URI.parse('www.google.com').class
=> URI::Generic
URI.parse('https://www.google.com').class
=> URI::HTTPS

In my production code, I have

URI.parse('www.google.com').open
=> NoMethodError: private method `open' called for an instance of URI::Generic (NoMethodError)

This got me reading the URI source code.

I think that URI::Generic should implement open as a public method and throw an error that explains the issue if its called.

This cost me over an hour. - it must have caught others.
Otherwise. I will need to write a wrapper for URI.parse.

[brentgreeff]

I just realised - I dont need.

URI.parse('https://www.google.com').open.read

URI.parse('https://www.google.com').read - is just as good.

NoMethodError: undefined method read' for an instance of URI::Generic (NoMethodError)`
being a similar error.

pry(main)> URI.parse('www.google.com').host
=> nil

doesnt seem intuitive either.

I am not sure I understand the rationale of URI::Generic - wouldnt URI::Incomplete or URI::Invalid be a better choice?