Merge branch 'jk/prune-with-bitmap-fix'

When the reachability bitmap is in effect, the "do not lose recently created objects and those that are reachable from them" safety to protect us from races were disabled by mistake, which has been corrected. * jk/prune-with-bitmap-fix: prune: save reachable-from-recent objects with bitmaps pack-bitmap: clean up include_check after use