- /* NOTE: If purify_flag is true, we're in-place modifying objects that
- may be in purespace (and if not, they will be). Therefore, we have
- to be VERY careful to make sure that all objects that we create
- are purecopied -- objects in purespace are not marked for GC, and
- if we leave any impure objects inside of pure ones, we're really
- screwed. */