java.lang.ArrayIndexOutOfBoundsException: 0 at java.util.Arrays$ArrayList.get(Arrays.java:3841) at org.netbeans.modules.css.prep.util.CssPreprocessorUtils.decodeMappings(CssPreprocessorUtils.java:145) at org.netbeans.modules.css.prep.preferences.BasePreferences.getMappings(BasePreferences.java:89) at org.netbeans.modules.css.prep.preferences.SassPreferences.getMappings(SassPreferences.java:91) at org.netbeans.modules.css.prep.ui.customizer.CustomizerImpl.getOptionsPanel(CustomizerImpl.java:115) at org.netbeans.modules.css.prep.ui.customizer.CustomizerImpl.addChangeListener(CustomizerImpl.java:92) at org.netbeans.modules.web.common.ui.cssprep.CssPreprocessorsCustomizerPanel.init(CssPreprocessorsCustomizerPanel.java:108) at org.netbeans.modules.web.common.ui.cssprep.CssPreprocessorsCustomizerPanel.(CssPreprocessorsCustomizerPanel.java:100) at org.netbeans.modules.web.common.ui.cssprep.CssPreprocessorsCustomizer.createComponent(CssPreprocessorsCustomizer.java:74) at org.netbeans.spi.project.ui.support.ProjectCustomizer$DelegateCategoryProvider.create(ProjectCustomizer.java:629) at org.netbeans.modules.project.uiapi.CustomizerPane.setCategory(CustomizerPane.java:259) at org.netbeans.modules.project.uiapi.CustomizerPane.access$200(CustomizerPane.java:72) at org.netbeans.modules.project.uiapi.CustomizerPane$CategoryChangeListener.propertyChange(CustomizerPane.java:345) at java.beans.PropertyChangeSupport.fire(PropertyChangeSupport.java:335) at java.beans.PropertyChangeSupport.firePropertyChange(PropertyChangeSupport.java:327) at java.beans.PropertyChangeSupport.firePropertyChange(PropertyChangeSupport.java:263) at org.netbeans.modules.project.uiapi.CategoryModel.firePropertyChange(CategoryModel.java:118) at org.netbeans.modules.project.uiapi.CategoryModel.setCurrentCategory(CategoryModel.java:92) at org.netbeans.modules.project.uiapi.CategoryView.propertyChange(CategoryView.java:183) at java.beans.PropertyChangeSupport.fire(PropertyChangeSupport.java:335) at java.beans.PropertyChangeSupport.firePropertyChange(PropertyChangeSupport.java:327) at java.beans.PropertyChangeSupport.firePropertyChange(PropertyChangeSupport.java:263) at org.openide.explorer.ExplorerManager$2.run(ExplorerManager.java:891) at org.netbeans.modules.openide.util.NbMutexEventProvider$Event.doEvent(NbMutexEventProvider.java:118) at org.netbeans.modules.openide.util.NbMutexEventProvider$Event.readAccess(NbMutexEventProvider.java:93) at org.netbeans.modules.openide.util.LazyMutexImplementation.readAccess(LazyMutexImplementation.java:89) at org.openide.util.Mutex.readAccess(Mutex.java:260) at org.openide.explorer.ExplorerManager.fireInAWT(ExplorerManager.java:888) at org.openide.explorer.ExplorerManager$1AtomicSetSelectedNodes.fire(ExplorerManager.java:294) at org.openide.explorer.ExplorerManager.setSelectedNodes(ExplorerManager.java:305) at org.openide.explorer.ExplorerManager$1SetExploredContextAndSelection.run(ExplorerManager.java:393) at org.netbeans.modules.openide.util.DefaultMutexImplementation.readAccess(DefaultMutexImplementation.java:193) at org.netbeans.modules.openide.util.DefaultMutexImplementation$1R.run(DefaultMutexImplementation.java:1037) at org.netbeans.modules.openide.util.DefaultMutexImplementation.doWrapperAccess(DefaultMutexImplementation.java:1054) at org.netbeans.modules.openide.util.DefaultMutexImplementation.readAccess(DefaultMutexImplementation.java:183) at org.openide.util.Mutex.readAccess(Mutex.java:260) at org.openide.explorer.ExplorerManager.setExploredContextAndSelection(ExplorerManager.java:420) at org.openide.explorer.view.BeanTreeView.selectionChanged(BeanTreeView.java:149) at org.openide.explorer.view.TreeView.callSelectionChanged(TreeView.java:833) at org.openide.explorer.view.TreeView$TreePropertyListener.run(TreeView.java:1475) at org.netbeans.modules.openide.util.DefaultMutexImplementation$1Exec.run(DefaultMutexImplementation.java:973) at org.openide.nodes.Children$ProjectManagerDeadlockDetector.execute(Children.java:1938) at org.netbeans.modules.openide.util.DefaultMutexImplementation.postRequest(DefaultMutexImplementation.java:979) at org.netbeans.modules.openide.util.DefaultMutexImplementation.postRequest(DefaultMutexImplementation.java:942) at org.netbeans.modules.openide.util.DefaultMutexImplementation.postReadRequest(DefaultMutexImplementation.java:308) at org.openide.util.Mutex.postReadRequest(Mutex.java:371) at org.openide.explorer.view.TreeView$TreePropertyListener.valueChanged(TreeView.java:1444) at javax.swing.tree.DefaultTreeSelectionModel.fireValueChanged(DefaultTreeSelectionModel.java:635) at javax.swing.tree.DefaultTreeSelectionModel.notifyPathChange(DefaultTreeSelectionModel.java:1093) at javax.swing.tree.DefaultTreeSelectionModel.setSelectionPaths(DefaultTreeSelectionModel.java:294) at javax.swing.tree.DefaultTreeSelectionModel.setSelectionPath(DefaultTreeSelectionModel.java:188) at javax.swing.JTree.setSelectionPath(JTree.java:1634) at javax.swing.plaf.basic.BasicTreeUI.selectPathForEvent(BasicTreeUI.java:2393) at javax.swing.plaf.basic.BasicTreeUI$Handler.handleSelection(BasicTreeUI.java:3609) at javax.swing.plaf.basic.BasicTreeUI$Handler.mousePressedDND(BasicTreeUI.java:3586) at javax.swing.plaf.basic.BasicTreeUI$Handler.mousePressed(BasicTreeUI.java:3545) at java.awt.AWTEventMulticaster.mousePressed(AWTEventMulticaster.java:280) at java.awt.Component.processMouseEvent(Component.java:6530) at javax.swing.JComponent.processMouseEvent(JComponent.java:3324) at java.awt.Component.processEvent(Component.java:6298) at java.awt.Container.processEvent(Container.java:2236) at java.awt.Component.dispatchEventImpl(Component.java:4889) at java.awt.Container.dispatchEventImpl(Container.java:2294) at java.awt.Component.dispatchEvent(Component.java:4711) at java.awt.LightweightDispatcher.retargetMouseEvent(LightweightDispatcher.java:4888) at java.awt.LightweightDispatcher.processMouseEvent(LightweightDispatcher.java:4522) at java.awt.LightweightDispatcher.dispatchEvent(LightweightDispatcher.java:4466) at java.awt.Container.dispatchEventImpl(Container.java:2280) at java.awt.Window.dispatchEventImpl(Window.java:2746) at java.awt.Component.dispatchEvent(Component.java:4711) at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:758) at java.awt.EventQueue.access$500(EventQueue.java:97) at java.awt.EventQueue$3.run(EventQueue.java:709) at java.awt.EventQueue$3.run(EventQueue.java:703) at java.security.AccessController.doPrivileged(AccessController.java:0) at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:76) at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:86) at java.awt.EventQueue$4.run(EventQueue.java:731) at java.awt.EventQueue$4.run(EventQueue.java:729) at java.security.AccessController.doPrivileged(AccessController.java:0) at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:76) at java.awt.EventQueue.dispatchEvent(EventQueue.java:728) at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:159) 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)