A named reference with no contents produces an inline link, which does not work. The back-link from the footnote to the text does not work either.
Example: https://en.wikipedia.org/wiki/User:Petr_Matas/ref_error
Cause: The identifiers in the footnote entries are missing the number.
| Expected | <sup id="cite_ref-name_1-0" class="reference"> | <a href="#cite_note-name-1"> |
| Actual | as expected | as expected |
| Expected | <li id="cite_note-name-1"> | <a href="#cite_ref-name_1-0"> |
| Actual | <li id="cite_note-name"> | <a href="#cite_ref-name_0"> |