Make sure the context gets set

lib/liquid/template.rb

@@ -93,8 +93,11 @@ module Liquid
       context = case args.first
       when Liquid::Context
         args.shift
-      when Hash, Liquid::Drop
-        Context.new([args.shift, assigns], instance_assigns, registers, @rethrow_errors, @resource_limits)
+      when Liquid::Drop
+        drop = args.shift
+        drop.context = Context.new([drop, assigns], instance_assigns, registers, @rethrow_errors, @resource_limits)
+      when Hash
+        Context.new([args.shift, assigns], instance_assigns, registers, @rethrow_errors)
       when nil
         Context.new(assigns, instance_assigns, registers, @rethrow_errors, @resource_limits)
       else

test/liquid/template_test.rb

@@ -8,6 +8,10 @@ class TemplateContextDrop < Liquid::Drop
   def foo
     'fizzbuzz'
   end
+
+  def baz
+    @context.registers['lulz']
+  end
 end
 
 class TemplateTest < Test::Unit::TestCase
@@ -133,8 +137,10 @@ class TemplateTest < Test::Unit::TestCase
 
   def test_can_use_drop_as_context
     t = Template.new
+    t.registers['lulz'] = 'haha'
     drop = TemplateContextDrop.new
     assert_equal 'fizzbuzz', t.parse('{{foo}}').render(drop)
     assert_equal 'bar', t.parse('{{bar}}').render(drop)
+    assert_equal 'haha', t.parse("{{baz}}").render(drop)
   end
 end # TemplateTest