Program: 56464
Project: 56464
Buggy source:
@Override public void setEditText(final String editText){
  final InputEngine ie=EngineFactory.getInstance().createInputEngine();
  final ResultWrap<InputResult> input=new ResultWrap<InputResult>();
  final ResultWrap<HyperlinkType> hyperlinkType=new ResultWrap<HyperlinkType>();
  new CellVisitorTask(new CellVisitorForUpdate(){
    public boolean visit(    SCell cell){
      InputResult result;
      if ((result=input.get()) == null) {
        result=ie.parseInput(editText == null ? "String_Node_Str" : editText,cell.getCellStyle().getDataFormat(),new InputParseContext(Locales.getCurrent()));
        input.set(result);
        if (result.getType() == CellType.STRING) {
          hyperlinkType.set(getHyperlinkType((String)result.getValue()));
        }
      }
      Object cellval=cell.getValue();
      Object resultVal=result.getValue();
      String format=result.getFormat();
      if (euqlas(cellval,resultVal)) {
        return true;
      }
switch (result.getType()) {
case BLANK:
        cell.clearValue();
      break;
case BOOLEAN:
    cell.setBooleanValue((Boolean)resultVal);
  break;
case FORMULA:
cell.setFormulaValue((String)resultVal);
break;
case NUMBER:
if (resultVal instanceof Date) {
cell.setDateValue((Date)resultVal);
}
 else {
cell.setNumberValue((Double)resultVal);
}
break;
case STRING:
cell.setStringValue((String)resultVal);
if (hyperlinkType.get() != null) {
cell.setupHyperlink(hyperlinkType.get(),(String)resultVal,(String)resultVal);
}
break;
case ERROR:
default :
cell.setValue(resultVal);
}
String oldFormat=cell.getCellStyle().getDataFormat();
if (format != null && SCellStyle.FORMAT_GENERAL.equals(oldFormat)) {
StyleUtil.setDataFormat(cell.getSheet(),cell.getRowIndex(),cell.getColumnIndex(),format);
}
return true;
}
}
).doInWriteLock(getLock());
}

Fixed version (ground truth):
@Override public void setEditText(final String editText){
  final InputEngine ie=EngineFactory.getInstance().createInputEngine();
  final ResultWrap<InputResult> input=new ResultWrap<InputResult>();
  final ResultWrap<HyperlinkType> hyperlinkType=new ResultWrap<HyperlinkType>();
  new CellVisitorTask(new CellVisitorForUpdate(){
    public boolean visit(    SCell cell){
      InputResult result;
      if ((result=input.get()) == null) {
        result=ie.parseInput(editText == null ? "String_Node_Str" : editText,cell.getCellStyle().getDataFormat(),new InputParseContext(Locales.getCurrent()));
        input.set(result);
        if (result.getType() == CellType.STRING) {
          hyperlinkType.set(getHyperlinkType((String)result.getValue()));
        }
      }
      Object cellval=cell.getValue();
      Object resultVal=result.getValue();
      if (cell.getType() == result.getType() && euqlas(cellval,resultVal)) {
        return true;
      }
      String format=result.getFormat();
switch (result.getType()) {
case BLANK:
        cell.clearValue();
      break;
case BOOLEAN:
    cell.setBooleanValue((Boolean)resultVal);
  break;
case FORMULA:
cell.setFormulaValue((String)resultVal);
break;
case NUMBER:
if (resultVal instanceof Date) {
cell.setDateValue((Date)resultVal);
}
 else {
cell.setNumberValue((Double)resultVal);
}
break;
case STRING:
cell.setStringValue((String)resultVal);
if (hyperlinkType.get() != null) {
cell.setupHyperlink(hyperlinkType.get(),(String)resultVal,(String)resultVal);
}
break;
case ERROR:
default :
cell.setValue(resultVal);
}
String oldFormat=cell.getCellStyle().getDataFormat();
if (format != null && SCellStyle.FORMAT_GENERAL.equals(oldFormat)) {
StyleUtil.setDataFormat(cell.getSheet(),cell.getRowIndex(),cell.getColumnIndex(),format);
}
return true;
}
}
).doInWriteLock(getLock());
}