[NETBEANS-2220] NullPointerException on empty space when documents pop-up has more than one column

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 11.0
• Fix Version/s: 11.0
• Labels: 11.0-vc3 pull-request-available
• Assignee: Jan Lahoda
• Reporter: Jan Lahoda
• Created: 08/Mar/19 07:31
• Updated: 03/Nov/19 20:09
• Resolved: 09/Mar/19 04:41

Description

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:

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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)

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Issue Links

• links to: GitHub Pull Request #1158