cached_slot = cached_index = -1;
// FIXME: left[], right[], size[], and parent[] aren't getting cleared properly somewhere in here where a node had two children
int del = delete(index, root, 0);
cached_slot = cached_index = -1;
// FIXME: left[], right[], size[], and parent[] aren't getting cleared properly somewhere in here where a node had two children
int del = delete(index, root, 0);