Migrated from http://lampsvn.epfl.ch/trac/scala/ticket/568
Reporter dragos
I got this stack trace when removing a source directory from the project's build path, while closing the project.

java.util.NoSuchElementException: None.get
at scala.None$.get(Option.scala:136)
at scala.None$.get(Option.scala:134)
at lampion.eclipse.Plugin$class.fileFor(Plugin.scala:249)
at scala.tools.eclipse.Driver.fileFor(Driver.scala:7)
at lampion.eclipse.UIPlugin$class.fileFor(UIPlugin.scala:469)
at scala.tools.eclipse.Driver.fileFor(Driver.scala:7)
at lampion.eclipse.Editor$$anon$1.load(Editor.scala:270)
at lampion.eclipse.SourceViewer.inputDocumentChanged(SourceViewer.scala:142)
at org.eclipse.jface.text.TextViewer.fireInputDocumentChanged(TextViewer.java:2685)
at org.eclipse.jface.text.TextViewer.setDocument(TextViewer.java:2734)
at org.eclipse.jface.text.source.SourceViewer.setDocument(SourceViewer.java:518)
at org.eclipse.jface.text.source.projection.ProjectionViewer.setDocument(ProjectionViewer.java:370)
at org.eclipse.jface.text.source.SourceViewer.setDocument(SourceViewer.java:473)
at org.eclipse.ui.texteditor.AbstractTextEditor.initializeSourceViewer(AbstractTextEditor.java:3786)
at org.eclipse.ui.texteditor.AbstractTextEditor.createPartControl(AbstractTextEditor.java:3332)
at org.eclipse.ui.texteditor.StatusTextEditor.createPartControl(StatusTextEditor.java:53)
at org.eclipse.ui.texteditor.AbstractDecoratedTextEditor.createPartControl(AbstractDecoratedTextEditor.java:378)
at lampion.eclipse.Editor.createPartControl(Editor.scala:148)
at org.eclipse.ui.internal.EditorReference.createPartHelper(EditorReference.java:661)
at org.eclipse.ui.internal.EditorReference.createPart(EditorReference.java:426)
at org.eclipse.ui.internal.WorkbenchPartReference.getPart(WorkbenchPartReference.java:592)
at org.eclipse.ui.internal.PartPane.setVisible(PartPane.java:299)
at org.eclipse.ui.internal.presentations.PresentablePart.setVisible(PresentablePart.java:179)
at org.eclipse.ui.internal.presentations.util.PresentablePartFolder.select(PresentablePartFolder.java:268)
at org.eclipse.ui.internal.presentations.util.LeftToRightTabOrder.select(LeftToRightTabOrder.java:65)
at org.eclipse.ui.internal.presentations.util.TabbedStackPresentation.selectPart(TabbedStackPresentation.java:400)
at org.eclipse.ui.internal.PartStack.refreshPresentationSelection(PartStack.java:1256)
at org.eclipse.ui.internal.PartStack.handleDeferredEvents(PartStack.java:1224)
at org.eclipse.ui.internal.LayoutPart.deferUpdates(LayoutPart.java:400)
at org.eclipse.ui.internal.PartSashContainer.handleDeferredEvents(PartSashContainer.java:1397)
at org.eclipse.ui.internal.LayoutPart.deferUpdates(LayoutPart.java:400)
at org.eclipse.ui.internal.WorkbenchPage.handleDeferredEvents(WorkbenchPage.java:1348)
at org.eclipse.ui.internal.WorkbenchPage.deferUpdates(WorkbenchPage.java:1338)
at org.eclipse.ui.internal.WorkbenchPage.closeEditors(WorkbenchPage.java:1312)
at org.eclipse.ui.internal.WorkbenchPage.closeEditor(WorkbenchPage.java:1367)
at org.eclipse.ui.internal.EditorPane.doHide(EditorPane.java:61)
at org.eclipse.ui.internal.PartStack.close(PartStack.java:543)
at org.eclipse.ui.internal.EditorStack.close(EditorStack.java:206)
at org.eclipse.ui.internal.PartStack$1.close(PartStack.java:122)
at org.eclipse.ui.internal.presentations.util.TabbedStackPresentation$1.handleEvent(TabbedStackPresentation.java:81)
at org.eclipse.ui.internal.presentations.util.AbstractTabFolder.fireEvent(AbstractTabFolder.java:267)
at org.eclipse.ui.internal.presentations.util.AbstractTabFolder.fireEvent(AbstractTabFolder.java:276)
at org.eclipse.ui.internal.presentations.defaultpresentation.DefaultTabFolder.access$1(DefaultTabFolder.java:1)
at org.eclipse.ui.internal.presentations.defaultpresentation.DefaultTabFolder$1.closeButtonPressed(DefaultTabFolder.java:67)
at org.eclipse.ui.internal.presentations.PaneFolder.notifyCloseListeners(PaneFolder.java:596)
at org.eclipse.ui.internal.presentations.PaneFolder$3.close(PaneFolder.java:189)
at org.eclipse.swt.custom.CTabFolder.onMouse(CTabFolder.java:2159)
at org.eclipse.swt.custom.CTabFolder$1.handleEvent(CTabFolder.java:320)
at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:66)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1101)
at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:3319)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:2971)
at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:2389)
at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2353)
at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2219)
at org.eclipse.ui.internal.Workbench$4.run(Workbench.java:466)
at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:289)
at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:461)
at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149)
at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:106)
at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:169)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:106)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:76)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:363)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:176)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:508)
at org.eclipse.equinox.launcher.Main.basicRun(Main.java:447)
at org.eclipse.equinox.launcher.Main.run(Main.java:1173)