--- old/src/macosx/classes/com/apple/laf/AquaComboBoxPopup.java	2014-05-12 18:24:59.290154058 +0400
+++ new/src/macosx/classes/com/apple/laf/AquaComboBoxPopup.java	2014-05-12 18:24:59.166154054 +0400
@@ -121,6 +121,10 @@
     public void show() {
         final int startItemCount = comboBox.getItemCount();
 
+        if (startItemCount == 0) {
+            return;
+        }
+
         final Rectangle popupBounds = adjustPopupAndGetBounds();
         if (popupBounds == null) return; // null means don't show