call super from initialize

lib/arel/nodes/and.rb

@@ -4,6 +4,7 @@ class And < Arel::Nodes::Node
       attr_reader :children
 
       def initialize children, right = nil
+        super()
         unless Array === children
           warn "(#{caller.first}) AND nodes should be created with a list"
           children = [children, right]

lib/arel/nodes/binary.rb

@@ -4,6 +4,7 @@ class Binary < Arel::Nodes::Node
       attr_accessor :left, :right
 
       def initialize left, right
+        super()
         @left  = left
         @right = right
       end

lib/arel/nodes/function.rb

@@ -7,6 +7,7 @@ class Function < Arel::Nodes::Node
       attr_accessor :expressions, :alias, :distinct
 
       def initialize expr, aliaz = nil
+        super()
         @expressions = expr
         @alias       = aliaz && SqlLiteral.new(aliaz)
         @distinct    = false

lib/arel/nodes/insert_statement.rb

@@ -4,6 +4,7 @@ class InsertStatement < Arel::Nodes::Node
       attr_accessor :relation, :columns, :values
 
       def initialize
+        super()
         @relation = nil
         @columns  = []
         @values   = nil

lib/arel/nodes/node.rb

@@ -6,6 +6,9 @@ class Node
       include Arel::FactoryMethods
       include Enumerable
 
+      def initialize
+      end
+
       ###
       # Factory method to create a Nodes::Not node that has the recipient of
       # the caller as a child.

lib/arel/nodes/select_core.rb

@@ -5,6 +5,7 @@ class SelectCore < Arel::Nodes::Node
       attr_accessor :having, :source, :set_quantifier
 
       def initialize
+        super()
         @source         = JoinSource.new nil
         @top            = nil
 

lib/arel/nodes/select_statement.rb

@@ -5,6 +5,7 @@ class SelectStatement < Arel::Nodes::Node
       attr_accessor :limit, :orders, :lock, :offset, :with
 
       def initialize cores = [SelectCore.new]
+        super()
         @cores          = cores
         @orders         = []
         @limit          = nil

lib/arel/nodes/unary.rb

@@ -5,6 +5,7 @@ class Unary < Arel::Nodes::Node
       alias :value :expr
 
       def initialize expr
+        super()
         @expr = expr
       end