Jan Lahoda created NETBEANS-2220: ------------------------------------ Summary: NullPointerException on empty space when documents pop-up has more than one column Key: NETBEANS-2220 URL: https://issues.apache.org/jira/browse/NETBEANS-2220 Project: NetBeans Issue Type: Bug Affects Versions: 11.0 Reporter: Jan Lahoda Assignee: Jan Lahoda
When the document popup (triangle at the right top of editor) has more than one column, and some cell is empty in the pop-up, placing the mouse cursor over the empty cell leads to: --- java.lang.NullPointerException at org.netbeans.swing.tabcontrol.DocumentSwitcherTable.isClosable(DocumentSwitcherTable.java:174) at org.netbeans.swing.tabcontrol.DocumentSwitcherTable.onMouseEvent(DocumentSwitcherTable.java:88) at org.netbeans.swing.tabcontrol.ButtonPopupSwitcher.mouseMoved(ButtonPopupSwitcher.java:196) at java.desktop/java.awt.AWTEventMulticaster.mouseMoved(AWTEventMulticaster.java:338) at java.desktop/java.awt.AWTEventMulticaster.mouseMoved(AWTEventMulticaster.java:337) at java.desktop/java.awt.Component.processMouseMotionEvent(Component.java:6677) at java.desktop/javax.swing.JComponent.processMouseMotionEvent(JComponent.java:3360) at java.desktop/java.awt.Component.processEvent(Component.java:6401) at java.desktop/java.awt.Container.processEvent(Container.java:2263) at java.desktop/java.awt.Component.dispatchEventImpl(Component.java:5008) at java.desktop/java.awt.Container.dispatchEventImpl(Container.java:2321) at java.desktop/java.awt.Component.dispatchEvent(Component.java:4840) at java.desktop/java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4918) at java.desktop/java.awt.LightweightDispatcher.processMouseEvent(Container.java:4560) at java.desktop/java.awt.LightweightDispatcher.dispatchEvent(Container.java:4488) at java.desktop/java.awt.Container.dispatchEventImpl(Container.java:2307) at java.desktop/java.awt.Window.dispatchEventImpl(Window.java:2762) at java.desktop/java.awt.Component.dispatchEvent(Component.java:4840) at java.desktop/java.awt.EventQueue.dispatchEventImpl(EventQueue.java:772) at java.desktop/java.awt.EventQueue$4.run(EventQueue.java:721) at java.desktop/java.awt.EventQueue$4.run(EventQueue.java:715) at java.base/java.security.AccessController.doPrivileged(AccessController.java:389) at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:85) at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:95) at java.desktop/java.awt.EventQueue$5.run(EventQueue.java:745) at java.desktop/java.awt.EventQueue$5.run(EventQueue.java:743) at java.base/java.security.AccessController.doPrivileged(AccessController.java:389) at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:85) at java.desktop/java.awt.EventQueue.dispatchEvent(EventQueue.java:742) at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:136) [catch] at java.desktop/java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:203) at java.desktop/java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:124) at java.desktop/java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:113) at java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:109) at java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101) at java.desktop/java.awt.EventDispatchThread.run(EventDispatchThread.java:90) --- -- This message was sent by Atlassian JIRA (v7.6.3#76005)