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https://issues.apache.org/jira/browse/NETBEANS-2228?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16788789#comment-16788789
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Geertjan Wielenga commented on NETBEANS-2228:
---------------------------------------------

https://stackoverflow.com/questions/52930549/netbeans-9-java-lang-nullpointerexception-issue-with-jdk-10-0-2

> Got NPE opening a file from PHP project
> ---------------------------------------
>
>                 Key: NETBEANS-2228
>                 URL: https://issues.apache.org/jira/browse/NETBEANS-2228
>             Project: NetBeans
>          Issue Type: Bug
>    Affects Versions: 10.0
>         Environment: Windows 10
>            Reporter: Renato Moutinho Silva
>            Priority: Major
>         Attachments: ide.log
>
>
> Was working on a PHP project without any issues. However, after closing 
> netbeans and starting it again, I started getting the NPE below on any file I 
> try to open:
> java.lang.NullPointerException
>     at 
> org.netbeans.modules.editor.fold.ui.CodeFoldingSideBar.resolveBackColor(CodeFoldingSideBar.java:350)
>     at 
> org.netbeans.modules.editor.fold.ui.CodeFoldingSideBar.updateColors(CodeFoldingSideBar.java:365)
>     at 
> org.netbeans.modules.editor.fold.ui.CodeFoldingSideBar.access$200(CodeFoldingSideBar.java:99)
>     at 
> org.netbeans.modules.editor.fold.ui.CodeFoldingSideBar$2.preferenceChange(CodeFoldingSideBar.java:228)
>     at 
> org.netbeans.modules.editor.fold.ui.CodeFoldingSideBar.addNotify(CodeFoldingSideBar.java:284)
>     at java.awt.Container.addNotify(Container.java:2773)
>     at javax.swing.JComponent.addNotify(JComponent.java:4740)
>     at 
> org.netbeans.modules.editor.impl.CustomizableSideBar$WestSidebarHolder.addNotify(CustomizableSideBar.java:286)
>     at java.awt.Container.addNotify(Container.java:2773)
>     at javax.swing.JComponent.addNotify(JComponent.java:4740)
>     at java.awt.Container.addNotify(Container.java:2773)
>     at javax.swing.JComponent.addNotify(JComponent.java:4740)
>     at java.awt.Container.addNotify(Container.java:2773)
>     at javax.swing.JComponent.addNotify(JComponent.java:4740)
>     at java.awt.Container.addImpl(Container.java:1121)
>     at java.awt.Container.add(Container.java:973)
>     at 
> org.openide.text.CloneableEditorInitializer.initCustomEditor(CloneableEditorInitializer.java:523)
>     at 
> org.openide.text.CloneableEditorInitializer.initCustomEditorAndDecorationsInEDT(CloneableEditorInitializer.java:573)
> [catch] at 
> org.openide.text.CloneableEditorInitializer.run(CloneableEditorInitializer.java:321)
>     at 
> org.openide.text.CloneableEditorInitializer.processPendingEDTRequests(CloneableEditorInitializer.java:135)
>     at 
> org.openide.text.CloneableEditorInitializer$1.run(CloneableEditorInitializer.java:84)
>     at 
> org.netbeans.core.windows.WindowManagerImpl$Exclusive$1.run(WindowManagerImpl.java:1551)
>     at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:311)
>     at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:756)
>     at java.awt.EventQueue.access$500(EventQueue.java:97)
>     at java.awt.EventQueue$3.run(EventQueue.java:709)
>     at java.awt.EventQueue$3.run(EventQueue.java:703)
>     at java.security.AccessController.doPrivileged(Native Method)
>     at 
> java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:80)
>     at java.awt.EventQueue.dispatchEvent(EventQueue.java:726)
>     at 
> org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:136)
>     at 
> java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:201)
>     at 
> java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)
>     at 
> java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105)
>     at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
>     at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
>     at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)



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