Support deeper nesting of multi bulks

lib/hiredis/ruby/reader.rb

@@ -32,14 +32,17 @@ class Task
         method_index[?*] = :process_multi_bulk_reply
         METHOD_INDEX = method_index.freeze
 
-        attr_accessor :parent, :child
+        attr_reader :parent
+        attr_reader :depth
         attr_accessor :multi_bulk
 
         def initialize(buffer, parent = nil, depth = 0)
-          @buffer, @parent = buffer, parent
+          @buffer, @parent, @depth = buffer, parent, depth
+        end
 
-          # Require 3 nested tasks
-          @child = Task.new(@buffer, self, depth + 1) if depth < 2
+        # Note: task depth is not checked.
+        def child
+          @child ||= Task.new(@buffer, self, depth + 1)
         end
 
         def root

test/reader_test.rb

@@ -70,6 +70,11 @@ def test_nested_multi_bulk
     @reader.feed("*2\r\n*2\r\n$5\r\nhello\r\n$5\r\nworld\r\n$1\r\n!\r\n")
     assert_equal [["hello", "world"], "!"], @reader.gets
   end
+
+  def test_nested_multi_bulk_redux
+    @reader.feed("*2\r\n*2\r\n*1\r\n$5\r\nhello\r\n$5\r\nworld\r\n$1\r\n!\r\n")
+    assert_equal [[["hello"], "world"], "!"], @reader.gets
+  end
 end
 
 if defined?(Hiredis::Ruby::Reader)