Raymond Toy <toy(a)rtp.ericsson.se&gt; writes: Hmm. It seems to be a very real problem: x is a Bufpos so it should never ever be 0. I am not sure whether the new wordskipping logic in syntax.c is correct (it might contain a off by one error). However this code should never ever be reached if from = 1 and count = -1 as from already is the lowest possible value! Could you check the value of 'limit' in this frame? If limit is 0 above somebody has screwed up the BUF_BEGV of the minibuffer. That would then be the real problem the scan_words change is just exposing it. Jan