datetime_select should work with -/+ infinity dates

actionpack/lib/action_view/helpers/date_helper.rb

@@ -783,7 +783,7 @@ module ActionView
       private
         %w( sec min hour day month year ).each do |method|
           define_method(method) do
-            @datetime.kind_of?(Fixnum) ? @datetime : @datetime.send(method) if @datetime
+            @datetime.kind_of?(Numeric) ? @datetime : @datetime.send(method) if @datetime
           end
         end
 

actionpack/test/template/date_helper_test.rb

@@ -2084,6 +2084,18 @@ class DateHelperTest < ActionView::TestCase
     assert_dom_equal expected, datetime_select("post", "updated_at", { :date_separator => " / ", :datetime_separator => " , ", :time_separator => " - ", :include_seconds => true })
   end
 
+  def test_datetime_select_with_integer
+    @post = Post.new
+    @post.updated_at = 3
+    datetime_select("post", "updated_at")
+  end
+
+  def test_datetime_select_with_infinity # Float
+    @post = Post.new
+    @post.updated_at = (-1.0/0)
+    datetime_select("post", "updated_at")
+  end
+
   def test_datetime_select_with_default_prompt
     @post = Post.new
     @post.updated_at = nil