title: Eclipse History view blank
body: <p>After updating to Eclipse 4.5 Mars the History view always remains blank, no matter if I drag a file from the Eclipse Navigator or select Team >> Show History from the context menu. I'm using both Git and CVS - the problem is the same.</p>
  
  <p><img src="https://i.stack.imgur.com/cqPcI.png" alt="enter image description here"></p>
  
  <p>I found this entry in the .log file:</p>
  
  <pre><code>!ENTRY org.eclipse.ui 4 0 2015-07-03 10:09:28.308
  !MESSAGE Unhandled event loop exception
  !STACK 0
  java.lang.NullPointerException
      at org.eclipse.ui.internal.WorkbenchPage.busyShowView(WorkbenchPage.java:1270)
      at org.eclipse.ui.internal.WorkbenchPage$12.run(WorkbenchPage.java:4211)
      at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:70)
      at org.eclipse.ui.internal.WorkbenchPage.showView(WorkbenchPage.java:4207)
      at org.eclipse.ui.internal.WorkbenchPage.showView(WorkbenchPage.java:4187)
      at org.eclipse.team.ui.TeamUI.showHistoryFor(TeamUI.java:107)
      at org.eclipse.team.internal.ccvs.ui.actions.ShowResourceInHistoryAction$1.run(ShowResourceInHistoryAction.java:35)
      at org.eclipse.team.internal.ccvs.ui.repo.RepositoryManager.run(RepositoryManager.java:765)
      at org.eclipse.team.internal.ccvs.ui.actions.CVSAction$2.run(CVSAction.java:361)
      at org.eclipse.team.internal.ccvs.ui.actions.CVSAction$3.run(CVSAction.java:370)
      at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:70)
      at org.eclipse.team.internal.ccvs.ui.actions.CVSAction.run(CVSAction.java:367)
      at org.eclipse.team.internal.ccvs.ui.actions.ShowResourceInHistoryAction.execute(ShowResourceInHistoryAction.java:31)
      at org.eclipse.team.internal.ccvs.ui.actions.CVSAction.run(CVSAction.java:117)
      at org.eclipse.team.internal.ui.actions.TeamAction.runWithEvent(TeamAction.java:549)
      at org.eclipse.ui.internal.PluginAction.runWithEvent(PluginAction.java:237)
      at org.eclipse.jface.action.ActionContributionItem.handleWidgetSelection(ActionContributionItem.java:595)
      at org.eclipse.jface.action.ActionContributionItem.access$2(ActionContributionItem.java:511)
      at org.eclipse.jface.action.ActionContributionItem$5.handleEvent(ActionContributionItem.java:420)
      at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
      at org.eclipse.swt.widgets.Display.sendEvent(Display.java:4362)
      at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1113)
      at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:4180)
      at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3769)
      at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$4.run(PartRenderingEngine.java:1127)
      at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:337)
      at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:1018)
      at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:156)
      at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:654)
      at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:337)
      at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:598)
      at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:150)
      at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:139)
      at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:196)
      at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:134)
      at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:104)
      at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:380)
      at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:235)
      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:669)
      at org.eclipse.equinox.launcher.Main.basicRun(Main.java:608)
      at org.eclipse.equinox.launcher.Main.run(Main.java:1515)
  </code></pre>