select2-full.js in select2-rails-4.0.12

- old
+ new

@@ -1,7 +1,7 @@
 /*!
- * Select2 4.0.11
+ * Select2 4.0.12
  * https://select2.github.io
  *
  * Released under the MIT license
  * https://github.com/select2/select2/blob/master/LICENSE.md
  */
@@ -4496,10 +4496,13 @@
     var parentOffset = {
       top: 0,
       left: 0
     };
 
-    if ($.contains(document.body, $offsetParent[0])) {
+    if (
+      $.contains(document.body, $offsetParent[0]) ||
+      $offsetParent[0].isConnected
+      ) {
       parentOffset = $offsetParent.offset();
     }
 
     css.top -= parentOffset.top;
     css.left -= parentOffset.left;