Thanks for confirming.
Dumb question. Is the process of bisecting simply building emacs at half-way commits between passing and failing builds till you narrow down to the breaking commit?
My each build takes 5-10 minutes. So that would take a long time to narrow down to the culprit.
Confirmed. Something seems to suppress highlighting in the minibuffer -
displaying eldoc in tooltips works as before. Could you bisect to find
out what's been causing this?