Seems the node driver throws a "MongoError: Cursor is closed" if you try to change an option, even if the cursor isClosed is false.

> const c = db.coll.find()

> c.isClosed()
false
> c.addOption(64)
Thrown:
MongoError: Cursor is closed

Note that using the internal cursor does the same thing, so it may be either a driver issue or a bug with how we expect the driver to act.

> c.cursor.addCursorFlag(16)
Thrown:
MongoError: Cursor is closed
> c.cursor.isClosed()
false