FIX: Do not raise if title cannot be crawled (#16247)

If the crawled page returned an error, `FinalDestination#safe_get`
yielded `nil` for `uri` and `chunk` arguments. Another problem is that
`get` did not handle the case when `safe_get` failed and did not return
the `location` and `set_cookie` headers.

lib/retrieve_title.rb

@@ -62,6 +62,8 @@ module RetrieveTitle
 
     fd.get do |_response, chunk, uri|
       unless Net::HTTPRedirection === _response
+        throw :done if uri.blank?
+
         if current
           current << chunk
         else