Program: 69758
Project: 69758
Buggy source:
@Override protected void initForm(FormItemContainer formLayout,Controller listener,UserRequest ureq){
  setFormTitle("String_Node_Str");
  List<QEducationalContext> levels=qpoolService.getAllEducationlContexts();
  String[] contextKeys=new String[levels.size()];
  String[] contextValues=new String[levels.size()];
  int count=0;
  for (  QEducationalContext level : levels) {
    contextKeys[count]=level.getLevel();
    String translation=translate("String_Node_Str" + level.getLevel().toLowerCase());
    if (translation.length() > 128) {
      translation=level.getLevel();
    }
    contextValues[count++]=translation;
  }
  contextEl=uifactory.addDropdownSingleselect("String_Node_Str","String_Node_Str",formLayout,contextKeys,contextValues,null);
  String page=velocity_root + "String_Node_Str";
  learningTimeContainer=FormLayoutContainer.createCustomFormLayout("String_Node_Str",getTranslator(),page);
  learningTimeContainer.setRootForm(mainForm);
  learningTimeContainer.setLabel("String_Node_Str",null);
  formLayout.add(learningTimeContainer);
  LOMDuration duration=MetadataConverterHelper.convertDuration(item.getEducationalLearningTime());
  learningTimeDayElement=uifactory.addIntegerElement("String_Node_Str","String_Node_Str",duration.getDay(),learningTimeContainer);
  learningTimeDayElement.setDisplaySize(3);
  learningTimeDayElement.setMandatory(true);
  learningTimeHourElement=uifactory.addIntegerElement("String_Node_Str","String_Node_Str",duration.getHour(),learningTimeContainer);
  learningTimeHourElement.setDisplaySize(3);
  learningTimeHourElement.setMandatory(true);
  learningTimeMinuteElement=uifactory.addIntegerElement("String_Node_Str","String_Node_Str",duration.getMinute(),learningTimeContainer);
  learningTimeMinuteElement.setDisplaySize(3);
  learningTimeMinuteElement.setMandatory(true);
  learningTimeSecondElement=uifactory.addIntegerElement("String_Node_Str","String_Node_Str",duration.getSeconds(),learningTimeContainer);
  learningTimeSecondElement.setDisplaySize(3);
  learningTimeSecondElement.setMandatory(true);
  FormLayoutContainer buttonsCont=FormLayoutContainer.createButtonLayout("String_Node_Str",getTranslator());
  buttonsCont.setRootForm(mainForm);
  formLayout.add(buttonsCont);
  uifactory.addFormSubmitButton("String_Node_Str","String_Node_Str",buttonsCont);
  uifactory.addFormCancelButton("String_Node_Str",buttonsCont,ureq,getWindowControl());
}

Fixed version (ground truth):
@Override protected void initForm(FormItemContainer formLayout,Controller listener,UserRequest ureq){
  setFormTitle("String_Node_Str");
  List<QEducationalContext> levels=qpoolService.getAllEducationlContexts();
  String[] contextKeys=new String[levels.size()];
  String[] contextValues=new String[levels.size()];
  int count=0;
  for (  QEducationalContext level : levels) {
    contextKeys[count]=level.getLevel();
    String translation=translate("String_Node_Str" + level.getLevel().toLowerCase());
    if (translation.length() > 128) {
      translation=level.getLevel();
    }
    contextValues[count++]=translation;
  }
  contextEl=uifactory.addDropdownSingleselect("String_Node_Str","String_Node_Str",formLayout,contextKeys,contextValues,null);
  contextEl.setEnabled(count > 0);
  String page=velocity_root + "String_Node_Str";
  learningTimeContainer=FormLayoutContainer.createCustomFormLayout("String_Node_Str",getTranslator(),page);
  learningTimeContainer.setRootForm(mainForm);
  learningTimeContainer.setLabel("String_Node_Str",null);
  formLayout.add(learningTimeContainer);
  LOMDuration duration=MetadataConverterHelper.convertDuration(item.getEducationalLearningTime());
  learningTimeDayElement=uifactory.addIntegerElement("String_Node_Str","String_Node_Str",duration.getDay(),learningTimeContainer);
  learningTimeDayElement.setDisplaySize(3);
  learningTimeDayElement.setMandatory(true);
  learningTimeHourElement=uifactory.addIntegerElement("String_Node_Str","String_Node_Str",duration.getHour(),learningTimeContainer);
  learningTimeHourElement.setDisplaySize(3);
  learningTimeHourElement.setMandatory(true);
  learningTimeMinuteElement=uifactory.addIntegerElement("String_Node_Str","String_Node_Str",duration.getMinute(),learningTimeContainer);
  learningTimeMinuteElement.setDisplaySize(3);
  learningTimeMinuteElement.setMandatory(true);
  learningTimeSecondElement=uifactory.addIntegerElement("String_Node_Str","String_Node_Str",duration.getSeconds(),learningTimeContainer);
  learningTimeSecondElement.setDisplaySize(3);
  learningTimeSecondElement.setMandatory(true);
  FormLayoutContainer buttonsCont=FormLayoutContainer.createButtonLayout("String_Node_Str",getTranslator());
  buttonsCont.setRootForm(mainForm);
  formLayout.add(buttonsCont);
  uifactory.addFormSubmitButton("String_Node_Str","String_Node_Str",buttonsCont);
  uifactory.addFormCancelButton("String_Node_Str",buttonsCont,ureq,getWindowControl());
}