test.rb

DB = Sequel.mysql(:host => db_config["host"],
             :user => db_config["username"],
             :password => db_config["password"],
             :database => db_config["database"],
             :encoding => db_config["encoding"],
             :max_connections => 1,
             :compress => true,
             :single_threaded => true)

DB.disconnect

NoMethodError: undefined method `close' for nil:NilClass
from /home/deepak/.rvm/gems/ree-1.8.7-2010.01/gems/sequel-3.10.0/lib/sequel/adapters/mysql.rb:217:in `disconnect_connection'
from /home/deepak/.rvm/gems/ree-1.8.7-2010.01/gems/sequel-3.10.0/lib/sequel/database.rb:85
from /home/deepak/.rvm/gems/ree-1.8.7-2010.01/gems/sequel-3.10.0/lib/sequel/connection_pool/single.rb:14:in `call'
from /home/deepak/.rvm/gems/ree-1.8.7-2010.01/gems/sequel-3.10.0/lib/sequel/connection_pool/single.rb:14:in `disconnect'
from /home/deepak/.rvm/gems/ree-1.8.7-2010.01/gems/sequel-3.10.0/lib/sequel/database.rb:312:in `disconnect'
from (irb):24