Missing not existing handling for 'protocol' in "process a URLPatternInit"

[shannonbooth]

What is the issue with the URL Pattern Standard?

process a URLPatternInit is missing null handling in some of the steps, which can result in null being passed through when a string is expected.

This occurs on step 16:

16. If init["port"] exists, then set result["port"] to the result of process port for init given init["port"], result["protocol"], and type.

And step 17.3:

3. Set result["pathname"] to the result of process pathname for init given result["pathname"], result["protocol"], and type.

In both cases, result["protocol"] may be missing. It appears the intent is to pass in an empty string if missing.

[annevk]

cc @youennf