java.lang.AssertionError: must have container project
   at org.netbeans.modules.cnd.modelimpl.csm.core.NativeProjectListenerImpl.getProject(NativeProjectListenerImpl.java:353)
   at org.netbeans.modules.cnd.modelimpl.csm.core.NativeProjectListenerImpl.onProjectItemRemoved(NativeProjectListenerImpl.java:278)
   at org.netbeans.modules.cnd.modelimpl.csm.core.NativeProjectListenerImpl.fileRemoved(NativeProjectListenerImpl.java:116)
   at org.netbeans.modules.cnd.makeproject.NativeProjectProvider.fireFilesRemoved(NativeProjectProvider.java:293)
   at org.netbeans.modules.cnd.makeproject.api.configurations.MakeConfigurationDescriptor.fireFilesRemoved(MakeConfigurationDescriptor.java:536)
   at org.netbeans.modules.cnd.makeproject.api.configurations.Folder.removeItemAction(Folder.java:691)
   at org.netbeans.modules.cnd.makeproject.api.configurations.Folder.removeItemAction(Folder.java:683)
   at org.netbeans.modules.cnd.makeproject.ui.MakeLogicalViewProvider$ViewItemNode.destroy(MakeLogicalViewProvider.java:1844)
   at org.openide.nodes.FilterNode.destroy(FilterNode.java:613)
   at org.netbeans.modules.refactoring.spi.impl.SafeDeleteAction$2.run(SafeDeleteAction.java:157)
   at org.openide.filesystems.EventControl.runAtomicAction(EventControl.java:125)
   at org.openide.filesystems.FileSystem.runAtomicAction(FileSystem.java:566)
   at org.openide.filesystems.FileUtil.runAtomicAction(FileUtil.java:564)
   at org.netbeans.modules.refactoring.spi.impl.SafeDeleteAction.delete(SafeDeleteAction.java:153)
   at org.openide.explorer.ExplorerActionsImpl$DeleteActionPerformer.actionPerformed(ExplorerActionsImpl.java:602)
   at org.openide.util.actions.ActionInvoker$1.run(ActionInvoker.java:93)
   at org.openide.util.actions.ActionInvoker$ActionRunnable.actionPerformed(ActionInvoker.java:162)
   at org.netbeans.core.ModuleActions.invokeAction(ModuleActions.java:109)
   at org.netbeans.modules.openide.actions.ActionsBridgeImpl.invokeAction(ActionsBridgeImpl.java:60)
   at org.openide.util.actions.ActionInvoker$ActionRunnable.doRun(ActionInvoker.java:153)
   at org.openide.util.actions.ActionInvoker$2.run(ActionInvoker.java:110)
   at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1418)
   at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:1960)
Caused: org.openide.util.RequestProcessor$SlowItem: task failed due to: java.lang.AssertionError: must have container project
   at org.openide.util.RequestProcessor.post(RequestProcessor.java:421)
   at org.openide.util.actions.ActionInvoker.doPerformAction(ActionInvoker.java:114)
   at org.openide.util.actions.ActionInvoker.invokeAction(ActionInvoker.java:99)
   at org.openide.awt.GeneralAction$DelegateAction.actionPerformed(GeneralAction.java:219)
   at org.openide.windows.TopComponent.processKeyBinding(TopComponent.java:1109)
   at javax.swing.JComponent.processKeyBindings(JComponent.java:2897)
   at javax.swing.JComponent.processKeyEvent(JComponent.java:2814)
   at java.awt.Component.processEvent(Component.java:6044)
   at java.awt.Container.processEvent(Container.java:2041)
   at java.awt.Component.dispatchEventImpl(Component.java:4630)
   at java.awt.Container.dispatchEventImpl(Container.java:2099)
   at java.awt.Component.dispatchEvent(Component.java:4460)
   at java.awt.KeyboardFocusManager.redispatchEvent(KeyboardFocusManager.java:1850)
   at java.awt.DefaultKeyboardFocusManager.dispatchKeyEvent(DefaultKeyboardFocusManager.java:712)
   at java.awt.DefaultKeyboardFocusManager.preDispatchKeyEvent(DefaultKeyboardFocusManager.java:990)
   at java.awt.DefaultKeyboardFocusManager.typeAheadAssertions(DefaultKeyboardFocusManager.java:855)
   at java.awt.DefaultKeyboardFocusManager.dispatchEvent(DefaultKeyboardFocusManager.java:676)
   at java.awt.Component.dispatchEventImpl(Component.java:4502)
   at java.awt.Container.dispatchEventImpl(Container.java:2099)
   at java.awt.Window.dispatchEventImpl(Window.java:2478)
   at java.awt.Component.dispatchEvent(Component.java:4460)
   at java.awt.EventQueue.dispatchEvent(EventQueue.java:599)
   at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:138)
   at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269)
   at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184)
   at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174)
   at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169)
   at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161)
   at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)