This is the default value of RmonadData@value. It should always be replaced shortly after the object is created, thus should only be encountered if 1) the user is directly creating RmonadData objects (in which case they should be spoken to sternly) or 2) there is a bug in rmonad.
void_cache()
A function that represents a void, uncached value
Other cache: clear_cache
,
fail_cache
, make_cacher
,
make_recacher
, memory_cache
,
no_cache