1) open any graph
2) click on any edge in the graph
3) get an java.lang.ClassCastException

SEVERE [global]
[INFO] java.lang.ClassCastException: class com.sun.hotspot.igv.view.widgets.InputSlotWidget cannot be cast to class com.sun.hotspot.igv.graph.Figure (com.sun.hotspot.igv.view.widgets.InputSlotWidget is in unnamed module of loader org.netbeans.StandardModule$OneModuleClassLoader @4f60761f; com.sun.hotspot.igv.graph.Figure is in unnamed module of loader org.netbeans.StandardModule$OneModuleClassLoader @3de8ecd2)
[INFO] at com.sun.hotspot.igv.view.widgets.LineWidget$1.select(LineWidget.java:142)
[INFO] at org.netbeans.modules.visual.action.SelectAction.mouseReleased(SelectAction.java:86)
[INFO] at org.netbeans.api.visual.widget.SceneComponent$Operator$3.operate(SceneComponent.java:535)
[INFO] at org.netbeans.api.visual.widget.SceneComponent.processLocationOperator(SceneComponent.java:250)
[INFO] at org.netbeans.api.visual.widget.SceneComponent.mouseReleased(SceneComponent.java:137)
[INFO] at java.desktop/java.awt.AWTEventMulticaster.mouseReleased(AWTEventMulticaster.java:297)
[INFO] at java.desktop/java.awt.Component.processMouseEvent(Component.java:6626)
[INFO] at java.desktop/javax.swing.JComponent.processMouseEvent(JComponent.java:3389)
[INFO] at java.desktop/java.awt.Component.processEvent(Component.java:6391)
[INFO] at java.desktop/java.awt.Container.processEvent(Container.java:2266)
[INFO] at java.desktop/java.awt.Component.dispatchEventImpl(Component.java:5001)
[INFO] at java.desktop/java.awt.Container.dispatchEventImpl(Container.java:2324)
[INFO] at java.desktop/java.awt.Component.dispatchEvent(Component.java:4833)
[INFO] at java.desktop/java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4948)
[INFO] at java.desktop/java.awt.LightweightDispatcher.processMouseEvent(Container.java:4575)
[INFO] at java.desktop/java.awt.LightweightDispatcher.dispatchEvent(Container.java:4516)
[INFO] at java.desktop/java.awt.Container.dispatchEventImpl(Container.java:2310)
[INFO] at java.desktop/java.awt.Window.dispatchEventImpl(Window.java:2780)
[INFO] at java.desktop/java.awt.Component.dispatchEvent(Component.java:4833)
[INFO] at java.desktop/java.awt.EventQueue.dispatchEventImpl(EventQueue.java:773)
[INFO] at java.desktop/java.awt.EventQueue$4.run(EventQueue.java:722)
[INFO] at java.desktop/java.awt.EventQueue$4.run(EventQueue.java:716)
[INFO] at java.base/java.security.AccessController.doPrivileged(AccessController.java:399)
[INFO] at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:86)
[INFO] at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:97)
[INFO] at java.desktop/java.awt.EventQueue$5.run(EventQueue.java:746)
[INFO] at java.desktop/java.awt.EventQueue$5.run(EventQueue.java:744)
[INFO] at java.base/java.security.AccessController.doPrivileged(AccessController.java:399)
[INFO] at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:86)
[INFO] at java.desktop/java.awt.EventQueue.dispatchEvent(EventQueue.java:743)
[INFO] at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:136)
[INFO] [catch] at java.desktop/java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:203)
[INFO] at java.desktop/java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:124)
[INFO] at java.desktop/java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:113)
[INFO] at java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:109)
[INFO] at java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
[INFO] at java.desktop/java.awt.EventDispatchThread.run(EventDispatchThread.java:90)