The root problem was instead fixed by...

commit 144e73f5
Author: Noel Grandin <noel@peralex.com>
Date:   Tue Dec 22 09:05:32 2015 +0200

    fix Link::operator<

    so that it is consistent with operator==

Revert "Related: rhbz#1343766 a11y queries during dispose trigger listbox crashes"

This reverts commit c615943b.

Revert "Resolves: rhbz#1343766 a11y queries during dispose trigger combobox crashes"

This reverts commit f120abb4.