Program: 69439
Project: 69439
Buggy source:
@Override protected void initForm(FormItemContainer formLayout,Controller listener,UserRequest ureq){
  super.initForm(formLayout,listener,ureq);
  minScoreEl=uifactory.addTextElement("String_Node_Str","String_Node_Str",8,"String_Node_Str",formLayout);
  minScoreEl.setEnabled(false);
  ScoreBuilder maxScore=itemBuilder.getMaxScoreBuilder();
  String maxValue=maxScore == null ? "String_Node_Str" : (maxScore.getScore() == null ? "String_Node_Str" : maxScore.getScore().toString());
  maxScoreEl=uifactory.addTextElement("String_Node_Str","String_Node_Str",8,maxValue,formLayout);
  String[] modeValues=new String[]{translate("String_Node_Str"),translate("String_Node_Str")};
  assessmentModeEl=uifactory.addRadiosHorizontal("String_Node_Str","String_Node_Str",formLayout,modeKeys,modeValues);
  assessmentModeEl.addActionListener(FormEvent.ONCHANGE);
  if (itemBuilder.getScoreEvaluationMode() == ScoreEvaluation.perAnswer) {
    assessmentModeEl.select(ScoreEvaluation.perAnswer.name(),true);
  }
 else {
    assessmentModeEl.select(ScoreEvaluation.allCorrectAnswers.name(),true);
  }
  String scorePage=velocity_root + "String_Node_Str";
  scoreCont=FormLayoutContainer.createCustomFormLayout("String_Node_Str",getTranslator(),scorePage);
  formLayout.add(scoreCont);
  scoreCont.setLabel(null,null);
  for (  AbstractEntry entry : itemBuilder.getTextEntries()) {
    String points="String_Node_Str";
    Double score=entry.getScore();
    if (score != null) {
      points=score.toString();
    }
    String pointElId="String_Node_Str" + counter++;
    TextElement pointEl=uifactory.addTextElement(pointElId,null,5,points,scoreCont);
    pointEl.setDisplaySize(5);
    scoreCont.add(pointElId,pointEl);
    wrappers.add(new TextEntryWrapper(entry,pointEl));
  }
  scoreCont.contextPut("String_Node_Str",wrappers);
  scoreCont.setVisible(assessmentModeEl.isSelected(1));
  FormLayoutContainer buttonsContainer=FormLayoutContainer.createButtonLayout("String_Node_Str",getTranslator());
  buttonsContainer.setRootForm(mainForm);
  formLayout.add(buttonsContainer);
  uifactory.addFormSubmitButton("String_Node_Str",buttonsContainer);
}

Fixed version (ground truth):
@Override protected void initForm(FormItemContainer formLayout,Controller listener,UserRequest ureq){
  super.initForm(formLayout,listener,ureq);
  minScoreEl=uifactory.addTextElement("String_Node_Str","String_Node_Str",8,"String_Node_Str",formLayout);
  minScoreEl.setEnabled(false);
  ScoreBuilder maxScore=itemBuilder.getMaxScoreBuilder();
  String maxValue=maxScore == null ? "String_Node_Str" : (maxScore.getScore() == null ? "String_Node_Str" : maxScore.getScore().toString());
  maxScoreEl=uifactory.addTextElement("String_Node_Str","String_Node_Str",8,maxValue,formLayout);
  String[] modeValues=new String[]{translate("String_Node_Str"),translate("String_Node_Str")};
  assessmentModeEl=uifactory.addRadiosHorizontal("String_Node_Str","String_Node_Str",formLayout,modeKeys,modeValues);
  assessmentModeEl.addActionListener(FormEvent.ONCHANGE);
  if (itemBuilder.getScoreEvaluationMode() == ScoreEvaluation.perAnswer) {
    assessmentModeEl.select(ScoreEvaluation.perAnswer.name(),true);
  }
 else {
    assessmentModeEl.select(ScoreEvaluation.allCorrectAnswers.name(),true);
  }
  String scorePage=velocity_root + "String_Node_Str";
  scoreCont=FormLayoutContainer.createCustomFormLayout("String_Node_Str",getTranslator(),scorePage);
  formLayout.add(scoreCont);
  scoreCont.setLabel(null,null);
  for (  AbstractEntry entry : itemBuilder.getTextEntries()) {
    wrappers.add(createTextEntryWrapper(entry));
  }
  scoreCont.contextPut("String_Node_Str",wrappers);
  scoreCont.setVisible(assessmentModeEl.isSelected(1));
  FormLayoutContainer buttonsContainer=FormLayoutContainer.createButtonLayout("String_Node_Str",getTranslator());
  buttonsContainer.setRootForm(mainForm);
  formLayout.add(buttonsContainer);
  uifactory.addFormSubmitButton("String_Node_Str",buttonsContainer);
}