Here is a reference for what the bug statuses used on this tracker are, and how they should be used.
The default status. Somebody has reported the bug or feature request, but no developer looked at it or triaged it yet.
It's possible to assign links from one issue to another. It might not always be clear what they mean however. For example, one might wonder what is the difference between "blocks" and "precedes".
The following page on the Redmine FAQ explains the different dependencies rather well: