1. run: env -u INFOPATH info --init-file /dev/null
2. press `M-x tree-search`, enter `lkjlkjlkj` as the search term, and press Enter. 3. after “Search failed” is displayed, pressing `M-x search-next` again causes the echo area to display “Going back to last match from Top”, and the cursor gets stuck in the echo area and cannot move.
