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The editor seems to be broken in 3.3M3. This may or may not be a platform-specific issue. I am using linux-x68-gtk. From the stacktrace it has to do something with code-folding. The bug is reproduceable and occurs for every java-editor but not for other editors. I could not find a workaround. Even with a fresh workspace the error remained. The problem did not go away when I switched back to 3.3M2 that was running okay before. I had to switch back to 3.2 which is affected by this issue at all.
Created attachment 53416 [details] Screenshot
org.eclipse.core.runtime.AssertionFailedException: null argument: at org.eclipse.core.runtime.Assert.isNotNull(Assert.java:84) at org.eclipse.core.runtime.Assert.isNotNull(Assert.java:72) at org.eclipse.jdt.internal.ui.text.folding.JavaFoldingStructureProviderRegistry.getCurrentFoldingProvider(JavaFoldingStructureProviderRegistry.java:100) at org.eclipse.jdt.internal.ui.javaeditor.JavaEditor.createSourceViewer(JavaEditor.java:1849) at org.eclipse.ui.texteditor.AbstractTextEditor.createPartControl(AbstractTextEditor.java:2801) at org.eclipse.ui.texteditor.StatusTextEditor.createPartControl(StatusTextEditor.java:53) at org.eclipse.ui.texteditor.AbstractDecoratedTextEditor.createPartControl(AbstractDecoratedTextEditor.java:370) at org.eclipse.jdt.internal.ui.javaeditor.JavaEditor.createPartControl(JavaEditor.java:2836) at org.eclipse.jdt.internal.ui.javaeditor.CompilationUnitEditor.createPartControl(CompilationUnitEditor.java:1563) at org.eclipse.ui.internal.EditorReference.createPartHelper(EditorReference.java:596) at org.eclipse.ui.internal.EditorReference.createPart(EditorReference.java:372) at org.eclipse.ui.internal.WorkbenchPartReference.getPart(WorkbenchPartReference.java:566) at org.eclipse.ui.internal.PartPane.setVisible(PartPane.java:290) at org.eclipse.ui.internal.presentations.PresentablePart.setVisible(PresentablePart.java:140) 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:394) at org.eclipse.ui.internal.PartStack.refreshPresentationSelection(PartStack.java:1156) at org.eclipse.ui.internal.PartStack.setSelection(PartStack.java:1109) at org.eclipse.ui.internal.PartStack.showPart(PartStack.java:1335) at org.eclipse.ui.internal.PartStack.add(PartStack.java:458) at org.eclipse.ui.internal.EditorStack.add(EditorStack.java:102) at org.eclipse.ui.internal.PartStack.add(PartStack.java:444) at org.eclipse.ui.internal.EditorStack.add(EditorStack.java:111) at org.eclipse.ui.internal.EditorSashContainer.addEditor(EditorSashContainer.java:61) at org.eclipse.ui.internal.EditorAreaHelper.addToLayout(EditorAreaHelper.java:217) at org.eclipse.ui.internal.EditorAreaHelper.addEditor(EditorAreaHelper.java:207) at org.eclipse.ui.internal.EditorManager.createEditorTab(EditorManager.java:818) at org.eclipse.ui.internal.EditorManager.openEditorFromDescriptor(EditorManager.java:717) at org.eclipse.ui.internal.EditorManager.openEditor(EditorManager.java:678) at org.eclipse.ui.internal.WorkbenchPage.busyOpenEditorBatched(WorkbenchPage.java:2569) at org.eclipse.ui.internal.WorkbenchPage.busyOpenEditor(WorkbenchPage.java:2504) at org.eclipse.ui.internal.WorkbenchPage.access$10(WorkbenchPage.java:2496) at org.eclipse.ui.internal.WorkbenchPage$9.run(WorkbenchPage.java:2481) at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:67) at org.eclipse.ui.internal.WorkbenchPage.openEditor(WorkbenchPage.java:2476) at org.eclipse.ui.internal.WorkbenchPage.openEditor(WorkbenchPage.java:2461) at org.eclipse.jdt.internal.ui.javaeditor.EditorUtility.openInEditor(EditorUtility.java:295) at org.eclipse.jdt.internal.ui.javaeditor.EditorUtility.openInEditor(EditorUtility.java:169) at org.eclipse.jdt.ui.actions.OpenAction.run(OpenAction.java:195) at org.eclipse.jdt.ui.actions.OpenAction.run(OpenAction.java:176) at org.eclipse.jdt.ui.actions.SelectionDispatchAction.dispatchRun(SelectionDispatchAction.java:268) at org.eclipse.jdt.ui.actions.SelectionDispatchAction.run(SelectionDispatchAction.java:244) at org.eclipse.jdt.internal.ui.browsing.JavaBrowsingPart$6.open(JavaBrowsingPart.java:980) at org.eclipse.jface.viewers.StructuredViewer$2.run(StructuredViewer.java:819) at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:37) at org.eclipse.core.runtime.Platform.run(Platform.java:850) at org.eclipse.ui.internal.JFaceUtil$1.run(JFaceUtil.java:44) at org.eclipse.jface.util.SafeRunnable.run(SafeRunnable.java:149) at org.eclipse.jface.viewers.StructuredViewer.fireOpen(StructuredViewer.java:817) at org.eclipse.jface.viewers.StructuredViewer.handleOpen(StructuredViewer.java:1072) at org.eclipse.jface.viewers.StructuredViewer$6.handleOpen(StructuredViewer.java:1171) at org.eclipse.jface.util.OpenStrategy.fireOpenEvent(OpenStrategy.java:249) at org.eclipse.jface.util.OpenStrategy.access$2(OpenStrategy.java:243) at org.eclipse.jface.util.OpenStrategy$1.handleEvent(OpenStrategy.java:283) at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:66) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1095) at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:3205) at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:2881) at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:1924) at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:1888) at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:419) at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149) at org.eclipse.ui.internal.ide.IDEApplication.run(IDEApplication.java:95) at org.eclipse.core.internal.runtime.PlatformActivator$1.run(PlatformActivator.java:78) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:104) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:74) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:348) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:165) 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:324) at org.eclipse.core.launcher.Main.invokeFramework(Main.java:341) at org.eclipse.core.launcher.Main.basicRun(Main.java:285) at org.eclipse.core.launcher.Main.run(Main.java:987) at org.eclipse.core.launcher.Main.main(Main.java:962)
Does it work with a fresh workspace? I suspect you installed a plug-in that installed a folding provider which is now missing.
Please check the .log for errors and attach it here. Did you install other plug-ins on-top of M3 that could cause this? How did you install M3? Please try again by installing into a fresh location. If this doesn't fix the problem then zip and attach your workspace here. If you don't want to share your code then you can: 1. copy the workspace 2. delete all projects 3. delete history: .metadata\.plugins\org.eclipse.core.resources\.history 4. create a dummy Java project with a dummy CU 5. verify that the error is still there 6. zip and attach the workspace here
waiting for more info.
As I already told, the problem occured with a fresh workspace as well. I will dig in my log the other day and reopen the issue when I find more details.
Get rid of deprecated state.
.
