Program: 57918
Project: 57918
Buggy source:
@SuppressWarnings({"String_Node_Str","String_Node_Str"}) @Override public void handleEvent(final AEvent event){
  try {
    if ((event instanceof LoadPathwayEvent || event instanceof LoadPathwaysByGeneEvent) && PlatformUI.getWorkbench().getActiveWorkbenchWindow().getActivePage().findView("String_Node_Str") == null && PlatformUI.getWorkbench().getActiveWorkbenchWindow().getActivePage().findView("String_Node_Str") == null) {
      PlatformUI.getWorkbench().getActiveWorkbenchWindow().getActivePage().showView("String_Node_Str");
    }
 else     if (event instanceof OpenMatchmakerViewEvent) {
      try {
        PlatformUI.getWorkbench().getActiveWorkbenchWindow().getActivePage().showView("String_Node_Str");
      }
 catch (      PartInitException e) {
        e.printStackTrace();
      }
      CompareGroupsEvent compareGroupsEvent=new CompareGroupsEvent(((OpenMatchmakerViewEvent)event).getTablesToCompare());
      compareGroupsEvent.setSender(this);
      GeneralManager.get().getEventPublisher().triggerEvent(compareGroupsEvent);
      PlatformUI.getWorkbench().getDisplay().asyncExec(new Runnable(){
        @Override public void run(){
          StartClusteringAction startClusteringAction=new StartClusteringAction();
          startClusteringAction.setTables(((OpenMatchmakerViewEvent)event).getTablesToCompare());
          startClusteringAction.run();
        }
      }
);
    }
 else     if (event instanceof BookmarkEvent<?>) {
      PlatformUI.getWorkbench().getActiveWorkbenchWindow().getActivePage().showView("String_Node_Str");
      event.setSender(handler);
      GeneralManager.get().getEventPublisher().triggerEvent(event);
    }
 else     if (event instanceof OpenViewEvent) {
      PlatformUI.getWorkbench().getActiveWorkbenchWindow().getActivePage().showView(((OpenViewEvent)event).getViewType());
    }
  }
 catch (  PartInitException e) {
    e.printStackTrace();
    Logger.log(new Status(IStatus.INFO,this.toString(),"String_Node_Str",e));
  }
}

Fixed version (ground truth):
@Override public void handleEvent(final AEvent event){
  try {
    if ((event instanceof LoadPathwayEvent || event instanceof LoadPathwaysByGeneEvent) && PlatformUI.getWorkbench().getActiveWorkbenchWindow().getActivePage().findView("String_Node_Str") == null && PlatformUI.getWorkbench().getActiveWorkbenchWindow().getActivePage().findView("String_Node_Str") == null) {
      PlatformUI.getWorkbench().getActiveWorkbenchWindow().getActivePage().showView("String_Node_Str");
    }
 else     if (event instanceof OpenMatchmakerViewEvent) {
      try {
        PlatformUI.getWorkbench().getActiveWorkbenchWindow().getActivePage().showView("String_Node_Str");
      }
 catch (      PartInitException e) {
        e.printStackTrace();
      }
      CompareGroupsEvent compareGroupsEvent=new CompareGroupsEvent(((OpenMatchmakerViewEvent)event).getTablesToCompare());
      compareGroupsEvent.setSender(this);
      GeneralManager.get().getEventPublisher().triggerEvent(compareGroupsEvent);
      PlatformUI.getWorkbench().getDisplay().asyncExec(new Runnable(){
        @Override public void run(){
          StartClusteringAction startClusteringAction=new StartClusteringAction();
          startClusteringAction.setTables(((OpenMatchmakerViewEvent)event).getTablesToCompare());
          startClusteringAction.run();
        }
      }
);
    }
 else     if (event instanceof BookmarkEvent<?>) {
      PlatformUI.getWorkbench().getActiveWorkbenchWindow().getActivePage().showView("String_Node_Str");
      event.setSender(handler);
      GeneralManager.get().getEventPublisher().triggerEvent(event);
    }
 else     if (event instanceof OpenViewEvent) {
      PlatformUI.getWorkbench().getActiveWorkbenchWindow().getActivePage().showView(((OpenViewEvent)event).getViewType());
    }
  }
 catch (  PartInitException e) {
    e.printStackTrace();
    Logger.log(new Status(IStatus.INFO,this.toString(),"String_Node_Str",e));
  }
}