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java.lang.NullPointerException: 	at org.python.pydev.compare.PyMergeViewer.configureTextViewer(PyMergeViewer.java:141)	at org.eclipse.compare.contentmergeviewer.TextMergeViewer.createPart(TextMergeViewer.java:2180)	at org.eclipse.compare.contentmergeviewer.TextMergeViewer.createControls(TextMergeViewer.java:1672)	at org.eclipse.compare.contentmergeviewer.ContentMergeViewer.buildControl(ContentMergeViewer.java:771)	at org.eclipse.compare.contentmergeviewer.TextMergeViewer.(TextMergeViewer.java:1311)	at org.python.pydev.compare.PyMergeViewer.(PyMergeViewer.java:56)	at org.python.pydev.compare.PyContentViewerCreator.createViewer(PyContentViewerCreator.java:18)	at org.eclipse.compare.internal.ViewerDescriptor.createViewer(ViewerDescriptor.java:60)	at org.eclipse.compare.internal.CompareUIPlugin.getViewer(CompareUIPlugin.java:877)	at org.eclipse.compare.internal.CompareUIPlugin.findContentViewer(CompareUIPlugin.java:816)	at org.eclipse.compare.CompareUI.findContentViewer(CompareUI.java:280)	at org.eclipse.compare.CompareEditorInput.findContentViewer(CompareEditorInput.java:880)	at org.eclipse.team.ui.synchronize.SaveableCompareEditorInput.findContentViewer(SaveableCompareEditorInput.java:427)	at org.eclipse.compare.CompareEditorInput$3.getViewer(CompareEditorInput.java:509)	at org.eclipse.compare.CompareViewerSwitchingPane.setInput(CompareViewerSwitchingPane.java:245)	at org.eclipse.compare.CompareEditorInput.internalSetContentPaneInput(CompareEditorInput.java:791)	at org.eclipse.compare.CompareEditorInput.access$7(CompareEditorInput.java:789)	at org.eclipse.compare.CompareEditorInput$13.run(CompareEditorInput.java:729)	at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:70)	at org.eclipse.compare.CompareEditorInput.feed1(CompareEditorInput.java:723)	at org.eclipse.compare.CompareEditorInput.feedInput(CompareEditorInput.java:701)	at org.eclipse.compare.CompareEditorInput.createContents(CompareEditorInput.java:524)	at org.eclipse.compare.internal.CompareEditor.createCompareControl(CompareEditor.java:415)	at org.eclipse.compare.internal.CompareEditor.access$6(CompareEditor.java:385)	at org.eclipse.compare.internal.CompareEditor$3.run(CompareEditor.java:343)	at org.eclipse.ui.internal.UILockListener.doPendingWork(UILockListener.java:155)	at org.eclipse.ui.internal.UISynchronizer$3.run(UISynchronizer.java:158)	at org.eclipse.swt.widgets.RunnableLock.run(RunnableLock.java:35)	at org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Synchronizer.java:133)	at org.eclipse.swt.widgets.Display.runAsyncMessages(Display.java:3800)	at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3425)	at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:2384)	at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2348)	at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2200)	at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:495)	at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:288)	at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:490)	at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149)	at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:113)	at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:193)	at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:110)	at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:79)	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:386)	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:179)	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)	at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)	at java.lang.reflect.Method.invoke(Unknown Source)	at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:549)	at org.eclipse.equinox.launcher.Main.basicRun(Main.java:504)	at org.eclipse.equinox.launcher.Main.run(Main.java:1236)