1. https://www.wikipedia.org/ in latest Chrome on macOS
2. Typing in the search field
Actual:
* No results.
* Network inspection shows it is trying to fetch from `https://undefined.wikipedia.org/w/api.php`
```counterexample
GET https://undefined.wikipedia.org/w/api.php?action=query&format=json&generator=prefixsearch&prop=pageprops%7Cpageimages%7Cpageterms&redirects=&ppprop=displaytitle&piprop=thumbnail&pithumbsize=160&pilimit=6&wbptterms=description&gpssearch=e&gpsnamespace=0&gpslimit=6&callback=callbackStack.queue%5B0%5D
net::ERR_NAME_NOT_RESOLVED
```
Code versions:
* https://www.wikipedia.org/portal/wikipedia.org/assets/js/index-9cb696cbd1.js (last-modified: Tue, 11 Apr 2017 23:21:17 GMT)
* https://www.wikipedia.org/portal/wikipedia.org/assets/js/gt-ie9-011f8dbfa9.js (last-modified: Thu, 30 Mar 2017 18:46:45 GMT)