David Rowley <drowley@postgresql.org> writes:
> Fix list_copy_head() with empty Lists
> list_copy_head() given an empty List would crash from trying to
> dereference the List to obtain its length. Since NIL is how we represent
> an empty List, we should just be returning another empty List in this
> case.
I see that list_copy_head exists in v15 as well. It appears to have
no callers there, but we'd better fix it anyway in case somebody
back-patches a fix that uses it.
Or, maybe, remove it in 15?
regards, tom lane
