DoubleLinkedList: []

spec/test-lists.cr

@@ -42,6 +42,10 @@ describe "DoubleLinkedList" do
 			list.pop
 		end
 
+		expect_raises DoubleLinkedList::OutOfBounds do
+			list[0]
+		end
+
 		list.size.should eq 0
 	end
 end

src/list.cr

@@ -299,16 +299,18 @@ class DoubleLinkedList(V)
 	#
 	# TODO: either start with the first entry or the last depending on the index.
 	def [](index : Int32) : Node(V)
-		raise OutOfBounds.new if index > @size
+		raise OutOfBounds.new if index >= @size
 
-		return @first if index == 0
-		return @last  if index == @size - 1
+		return @first.not_nil! if index == 0
+		return @last.not_nil!  if index == @size - 1
 
 		i = 0
 		each_node do |node|
 			return node if i == index
 			i += 1
 		end
+
+		raise BrokenList.new "couldn't find the node, smth must be brkn"
 	end
 
 	# Concats two lists.