> If you do have pointers, or if the item iself [sic] is a pointer, it is up to you to ensure that the pointed-to objects remain valid while it is in the queue

> If you do have pointers, or if the item iself [sic] is a pointer, it is up to you to ensure that the pointed-to objects remain valid while it is in the queue and being consumed. Does this mean the producer have to keep pointer for the queued item around or it could get garbage collected? That seems.. unintuitive? Or is it just that working with the object could make the old pointer invalid?