java.lang.AssertionError
   at org.netbeans.modules.form.layoutdesign.LayoutFeeder.checkNeighbor(LayoutFeeder.java:1812)
   at org.netbeans.modules.form.layoutdesign.LayoutFeeder.addToGroup(LayoutFeeder.java:1308)
   at org.netbeans.modules.form.layoutdesign.LayoutFeeder.addInterval(LayoutFeeder.java:1179)
   at org.netbeans.modules.form.layoutdesign.LayoutFeeder.add(LayoutFeeder.java:473)
   at org.netbeans.modules.form.layoutdesign.LayoutDesigner.addComponents(LayoutDesigner.java:888)
   at org.netbeans.modules.form.layoutdesign.LayoutDesigner.endMoving(LayoutDesigner.java:849)
   at org.netbeans.modules.form.HandleLayer$ResizeComponentDrag.end(HandleLayer.java:3208)
   at org.netbeans.modules.form.HandleLayer$ComponentDrag.end(HandleLayer.java:2765)
   at org.netbeans.modules.form.HandleLayer.endDragging(HandleLayer.java:1379)
   at org.netbeans.modules.form.HandleLayer.mouseReleased(HandleLayer.java:1933)
   at java.awt.AWTEventMulticaster.mouseReleased(AWTEventMulticaster.java:289)
   at java.awt.Component.processMouseEvent(Component.java:6522)
   at javax.swing.JComponent.processMouseEvent(JComponent.java:3322)
   at java.awt.Component.processEvent(Component.java:6287)
   at java.awt.Container.processEvent(Container.java:2229)
   at java.awt.Component.dispatchEventImpl(Component.java:4878)
   at java.awt.Container.dispatchEventImpl(Container.java:2287)
   at java.awt.Component.dispatchEvent(Component.java:4700)
   at java.awt.LightweightDispatcher.retargetMouseEvent(LightweightDispatcher.java:4872)
   at java.awt.LightweightDispatcher.processMouseEvent(LightweightDispatcher.java:4528)
   at java.awt.LightweightDispatcher.dispatchEvent(LightweightDispatcher.java:4457)
   at java.awt.Container.dispatchEventImpl(Container.java:2273)
   at java.awt.Window.dispatchEventImpl(Window.java:2706)
   at java.awt.Component.dispatchEvent(Component.java:4700)
   at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:743)
   at java.awt.EventQueue.access$400(EventQueue.java:97)
   at java.awt.EventQueue$3.run(EventQueue.java:694)
   at java.awt.EventQueue$3.run(EventQueue.java:691)
   at java.security.AccessController.doPrivileged(AccessController.java:0)
   at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:75)
   at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:86)
   at java.awt.EventQueue$4.run(EventQueue.java:716)
   at java.awt.EventQueue$4.run(EventQueue.java:714)
   at java.security.AccessController.doPrivileged(AccessController.java:0)
   at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:75)
   at java.awt.EventQueue.dispatchEvent(EventQueue.java:713)
   at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:159)
   at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:220)
   at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:135)
   at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:123)
   at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:119)
   at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:111)
   at java.awt.EventDispatchThread.run(EventDispatchThread.java:97)