Program: 92207
Project: 92207
Buggy source:
@Override public Object execute(ExecutionEvent event) throws ExecutionException {
  IWorkbenchWindow window=PlatformUI.getWorkbench().getActiveWorkbenchWindow();
  if (window == null)   return null;
  Shell shell=window.getShell();
  MessageBox confirmOperation=new MessageBox(shell,SWT.ICON_QUESTION | SWT.CANCEL | SWT.OK);
  confirmOperation.setText(Messages.DeleteDialog_Title);
  confirmOperation.setMessage(Messages.DeleteTraceHandler_Message);
  if (confirmOperation.open() != SWT.OK)   return null;
  @SuppressWarnings("String_Node_Str") Iterator<Object> iterator=fSelection.iterator();
  while (iterator.hasNext()) {
    Object element=iterator.next();
    if (element instanceof TmfTraceElement) {
      TmfTraceElement trace=(TmfTraceElement)element;
      IResource resource=trace.getResource();
      try {
        IPath path=resource.getLocation();
        if (path != null && (trace.getParent() instanceof TmfTraceFolder)) {
          String location=path.toFile().getCanonicalPath();
          TmfExperimentFolder experimentFolder=trace.getProject().getExperimentsFolder();
          for (          ITmfProjectModelElement experiment : experimentFolder.getChildren()) {
            List<ITmfProjectModelElement> toRemove=new LinkedList<ITmfProjectModelElement>();
            for (            ITmfProjectModelElement child : experiment.getChildren()) {
              if (child.getResource().getLocation().toString().equals(location)) {
                toRemove.add(child);
              }
            }
            for (            ITmfProjectModelElement child : toRemove) {
              experiment.removeChild(child);
              child.getResource().delete(true,null);
            }
          }
        }
        resource.delete(true,new NullProgressMonitor());
        trace.deleteSupplementaryFolder();
        trace.getProject().refresh();
      }
 catch (      IOException e) {
        Activator.getDefault().logError("String_Node_Str" + trace.getName(),e);
      }
catch (      CoreException e) {
        Activator.getDefault().logError("String_Node_Str" + trace.getName(),e);
      }
    }
  }
  return null;
}

Fixed version (ground truth):
@Override public Object execute(ExecutionEvent event) throws ExecutionException {
  IWorkbenchWindow window=PlatformUI.getWorkbench().getActiveWorkbenchWindow();
  if (window == null)   return null;
  Shell shell=window.getShell();
  MessageBox confirmOperation=new MessageBox(shell,SWT.ICON_QUESTION | SWT.CANCEL | SWT.OK);
  confirmOperation.setText(Messages.DeleteDialog_Title);
  confirmOperation.setMessage(Messages.DeleteTraceHandler_Message);
  if (confirmOperation.open() != SWT.OK)   return null;
  @SuppressWarnings("String_Node_Str") Iterator<Object> iterator=fSelection.iterator();
  while (iterator.hasNext()) {
    Object element=iterator.next();
    if (element instanceof TmfTraceElement) {
      TmfTraceElement trace=(TmfTraceElement)element;
      IResource resource=trace.getResource();
      try {
        IPath path=resource.getLocation();
        if (path != null && (trace.getParent() instanceof TmfTraceFolder)) {
          String location=path.toString();
          TmfExperimentFolder experimentFolder=trace.getProject().getExperimentsFolder();
          for (          ITmfProjectModelElement experiment : experimentFolder.getChildren()) {
            List<ITmfProjectModelElement> toRemove=new LinkedList<ITmfProjectModelElement>();
            for (            ITmfProjectModelElement child : experiment.getChildren()) {
              if (child.getResource().getLocation().toString().equals(location)) {
                toRemove.add(child);
              }
            }
            for (            ITmfProjectModelElement child : toRemove) {
              experiment.removeChild(child);
              child.getResource().delete(true,null);
            }
          }
        }
        resource.delete(true,new NullProgressMonitor());
        trace.deleteSupplementaryFolder();
        trace.getProject().refresh();
      }
 catch (      CoreException e) {
        Activator.getDefault().logError("String_Node_Str" + trace.getName(),e);
      }
    }
  }
  return null;
}