diff -r 1f0034e370aa -r 71ad690e91f5 javauis/eswt_qt/org.eclipse.swt/Eclipse SWT/qt/org/eclipse/swt/widgets/Display.java
--- a/javauis/eswt_qt/org.eclipse.swt/Eclipse SWT/qt/org/eclipse/swt/widgets/Display.java	Fri Sep 17 16:44:34 2010 +0300
+++ b/javauis/eswt_qt/org.eclipse.swt/Eclipse SWT/qt/org/eclipse/swt/widgets/Display.java	Mon Oct 04 11:29:25 2010 +0300
@@ -1624,6 +1624,9 @@
 public int internal_new_GC (GCData data) {
     checkDevice ();
 
+    // GC creation on Display is not currently supported
+    SWT.error (SWT.ERROR_NOT_IMPLEMENTED);
+    
     setScreenPaintingAttributes(true);
 
     data.internalGc = new GraphicsContext();