Program: 81931
Project: 81931
Buggy source:
@SuppressWarnings("String_Node_Str") @Override protected void onBrowserEvent2(Event event){
  EventTarget eventTarget=event.getEventTarget();
  if (!Element.is(eventTarget)) {
    return;
  }
  final Element target=event.getEventTarget().cast();
  String eventType=event.getType();
  if ("String_Node_Str".equals(eventType) && !isKeyboardNavigationSuppressed() && KeyboardSelectionPolicy.DISABLED != getKeyboardSelectionPolicy()) {
    if (handleKey(event)) {
      return;
    }
  }
  TableCellElement tableCell=findNearestParentCell(target);
  if (tableCell == null) {
    return;
  }
  Element trElem=tableCell.getParentElement();
  if (trElem == null) {
    return;
  }
  TableRowElement tr=TableRowElement.as(trElem);
  Element sectionElem=tr.getParentElement();
  if (sectionElem == null) {
    return;
  }
  TableSectionElement section=TableSectionElement.as(sectionElem);
  int col=tableCell.getCellIndex();
  if (section == thead) {
    Header<?> header=headers.get(col);
    if (header != null && cellConsumesEventType(header.getCell(),eventType)) {
      header.onBrowserEvent(tableCell,event);
    }
  }
 else   if (section == tfoot) {
    Header<?> footer=footers.get(col);
    if (footer != null && cellConsumesEventType(footer.getCell(),eventType)) {
      footer.onBrowserEvent(tableCell,event);
    }
  }
 else   if (section == tbody) {
    boolean isClick="String_Node_Str".equals(eventType);
    int row=tr.getSectionRowIndex();
    if ("String_Node_Str".equals(eventType)) {
      if (hoveringRow != null && tbody.isOrHasChild(hoveringRow)) {
        setRowStyleName(hoveringRow,style.cellTableHoveredRow(),style.cellTableHoveredRowCell(),false);
      }
      hoveringRow=tr;
      setRowStyleName(hoveringRow,style.cellTableHoveredRow(),style.cellTableHoveredRowCell(),true);
    }
 else     if ("String_Node_Str".equals(eventType) && hoveringRow != null) {
      setRowStyleName(hoveringRow,style.cellTableHoveredRow(),style.cellTableHoveredRowCell(),false);
      hoveringRow=null;
    }
 else     if (isClick && ((getPresenter().getKeyboardSelectedRowInView() != row) || (keyboardSelectedColumn != col))) {
      boolean isFocusable=CellBasedWidgetImpl.get().isFocusable(target);
      isFocused=isFocused || isFocusable;
      keyboardSelectedColumn=col;
      getPresenter().setKeyboardSelectedRow(row,!isFocusable);
    }
    if (!isRowWithinBounds(row)) {
      return;
    }
    boolean isSelectionHandled=handlesSelection || KeyboardSelectionPolicy.BOUND_TO_SELECTION == getKeyboardSelectionPolicy();
    T value=getVisibleItem(row);
    CellPreviewEvent<T> previewEvent=CellPreviewEvent.fire(this,event,this,row,col,value,cellIsEditing,isSelectionHandled);
    if (isClick && !cellIsEditing && !isSelectionHandled) {
      doSelection(event,value,row,col);
    }
    if (!previewEvent.isCanceled()) {
      fireEventToCell(event,eventType,tableCell,value,row,columns.get(col));
    }
  }
}

Fixed version (ground truth):
@SuppressWarnings("String_Node_Str") @Override protected void onBrowserEvent2(Event event){
  EventTarget eventTarget=event.getEventTarget();
  if (!Element.is(eventTarget)) {
    return;
  }
  final Element target=event.getEventTarget().cast();
  String eventType=event.getType();
  if ("String_Node_Str".equals(eventType) && !isKeyboardNavigationSuppressed() && KeyboardSelectionPolicy.DISABLED != getKeyboardSelectionPolicy()) {
    if (handleKey(event)) {
      return;
    }
  }
  TableCellElement tableCell=findNearestParentCell(target);
  if (tableCell == null) {
    return;
  }
  Element trElem=tableCell.getParentElement();
  if (trElem == null) {
    return;
  }
  TableRowElement tr=TableRowElement.as(trElem);
  Element sectionElem=tr.getParentElement();
  if (sectionElem == null) {
    return;
  }
  TableSectionElement section=TableSectionElement.as(sectionElem);
  int col=tableCell.getCellIndex();
  if (section == thead) {
    Header<?> header=headers.get(col);
    if (header != null && cellConsumesEventType(header.getCell(),eventType)) {
      header.onBrowserEvent(tableCell,event);
    }
  }
 else   if (section == tfoot) {
    Header<?> footer=footers.get(col);
    if (footer != null && cellConsumesEventType(footer.getCell(),eventType)) {
      footer.onBrowserEvent(tableCell,event);
    }
  }
 else   if (section == tbody) {
    boolean isClick="String_Node_Str".equals(eventType);
    int row=tr.getSectionRowIndex();
    if ("String_Node_Str".equals(eventType)) {
      if (hoveringRow != null && tbody.isOrHasChild(hoveringRow)) {
        setRowStyleName(hoveringRow,style.cellTableHoveredRow(),style.cellTableHoveredRowCell(),false);
      }
      hoveringRow=tr;
      setRowStyleName(hoveringRow,style.cellTableHoveredRow(),style.cellTableHoveredRowCell(),true);
    }
 else     if ("String_Node_Str".equals(eventType) && hoveringRow != null) {
      setRowStyleName(hoveringRow,style.cellTableHoveredRow(),style.cellTableHoveredRowCell(),false);
      hoveringRow=null;
    }
 else     if (isClick && ((getPresenter().getKeyboardSelectedRowInView() != row) || (keyboardSelectedColumn != col))) {
      boolean isFocusable=CellBasedWidgetImpl.get().isFocusable(target);
      isFocused=isFocused || isFocusable;
      keyboardSelectedColumn=col;
      getPresenter().setKeyboardSelectedRow(row,!isFocusable,true);
    }
    if (!isRowWithinBounds(row)) {
      return;
    }
    boolean isSelectionHandled=handlesSelection || KeyboardSelectionPolicy.BOUND_TO_SELECTION == getKeyboardSelectionPolicy();
    T value=getVisibleItem(row);
    CellPreviewEvent<T> previewEvent=CellPreviewEvent.fire(this,event,this,row,col,value,cellIsEditing,isSelectionHandled);
    if (isClick && !cellIsEditing && !isSelectionHandled) {
      doSelection(event,value,row,col);
    }
    if (!previewEvent.isCanceled()) {
      fireEventToCell(event,eventType,tableCell,value,row,columns.get(col));
    }
  }
}