Hello everyone,

I'm using Rack::Session::Cookie to store an object (a Sequel model returned 
by a database call) in the session. However, I'm getting a "singleton can't 
be dumped" error when trying to do so. What is the reason for this error?

The interesting thing is, I only get the error when the Sequel object is 
first saved in the database then returned; the error is absent when the 
record already exists in the database and is returned via select (without 
saving), yet in both cases the objects/classes are identical.