Doc search is broken

[wlnirvana]

Search is stuck at this step, never updating:

The stack trace of the error logged out in developer console is:

 is not defined
    at Object.query (searchtools.js:158:19)
    at Object.setIndex (searchtools.js:98:14)
    at <anonymous>:1:8
    at b (jquery.js:2:839)
    at Function.globalEval (jquery.js:2:2878)
    at text script (jquery.js:2:82979)
    at jquery.js:2:79369
    at l (jquery.js:2:79486)
    at XMLHttpRequest.<anonymous> (jquery.js:2:82254)

Might be related to sphinx-doc/sphinx#8623

[Sony Huang]

Thanks for reporting the issue, the doc site is updated and the searching functionality is fixed