Heikki Linnakangas <heikki(at)enterprisedb(dot)com> writes:
> While looking at the HOT patch, I noticed that if there's an index tuple
> pointing to a non-existing heap tuple, we just silently ignore it.
This is intentional --- consider case where VACUUM has removed both
index and heap entries while some other (amazingly slow...) process is
in flight from the index to the heap.
regards, tom lane