1594 - removing from start/end of duplex list

This uncovers an issue with this interface to duplex lists: the caller
needs to check the result and invalidate any other pointers if it's null
(i.e. the list is now empty)

We *could* try to encapsulate the list in a header to help the caller
manage header pointers. But heck, let's see if writing tests helps
call-sites stay on the straight and narrow.

0 files changed, 0 insertions, 0 deletions