0.8.18.33:

        * When non-local lexical exits are compiled with (SAFETY 0),
          pass the unwind block without packing it into a VALUE-CELL.
          This disables checking of tag extent, but also eliminates
          one source of heap allocation in dynamic-extent closures.
        * Disable intrumenting of more-entries (bug reported by Robert
          J. Macomber).