java.lang.NullPointerException
   at org.netbeans.lib.editor.util.swing.DocumentUtilities.getMimeType(DocumentUtilities.java:867)
   at org.netbeans.editor.EditorUI.getDefaultColoring(EditorUI.java:677)
   at org.netbeans.modules.editor.completion.HTMLDocView.setBodyFontInCSS(HTMLDocView.java:186)
   at org.netbeans.modules.editor.completion.HTMLDocView.createDefaultEditorKit(HTMLDocView.java:178)
   at javax.swing.JEditorPane.getEditorKit(JEditorPane.java:916)
   at javax.swing.plaf.basic.BasicEditorPaneUI.getEditorKit(BasicEditorPaneUI.java:113)
   at javax.swing.plaf.basic.BasicTextUI.installUI(BasicTextUI.java:799)
   at javax.swing.plaf.basic.BasicEditorPaneUI.installUI(BasicEditorPaneUI.java:89)
   at javax.swing.JComponent.setUI(JComponent.java:664)
   at javax.swing.text.JTextComponent.setUI(JTextComponent.java:338)
   at javax.swing.text.JTextComponent.updateUI(JTextComponent.java:348)
   at javax.swing.text.JTextComponent.<init>(JTextComponent.java:322)
   at javax.swing.JEditorPane.<init>(JEditorPane.java:199)
   at org.netbeans.modules.editor.completion.HTMLDocView.<init>(HTMLDocView.java:84)
   at org.netbeans.modules.editor.completion.DocumentationScrollPane.<init>(DocumentationScrollPane.java:130)
   at org.netbeans.modules.editor.completion.CompletionLayout$DocPopup.show(CompletionLayout.java:441)
   at org.netbeans.modules.editor.completion.CompletionLayout.showDocumentation(CompletionLayout.java:180)
   at org.netbeans.modules.editor.completion.CompletionImpl$9.run(CompletionImpl.java:1127)
   at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:251)
   at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:705)
   at java.awt.EventQueue.access$000(EventQueue.java:101)
   at java.awt.EventQueue$3.run(EventQueue.java:666)
   at java.awt.EventQueue$3.run(EventQueue.java:664)
   at java.security.AccessController.doPrivileged(AccessController.java:0)
   at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
   at java.awt.EventQueue.dispatchEvent(EventQueue.java:675)
   at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:153)
   at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:211)
   at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:128)
   at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:117)
   at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:113)
   at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:105)
   at java.awt.EventDispatchThread.run(EventDispatchThread.java:90)