Program: 166636
Project: 166636
Buggy source:
/** 
 * Recognize an added belief task as solution to what questions, those that contain query variable <p> called only in GeneralInferenceControl.insertTaskLink on concept selection
 * @param concept The concept which potentially outdated anticipations should be processed
 * @paramt t The belief task
 * @param nal The derivation context
 */
public static void ProcessWhatQuestionAnswer(final Concept concept,final Task t,final DerivationContext nal){
  if (!t.sentence.term.hasVarQuery() && t.sentence.isJudgment() || t.sentence.isGoal()) {
    for (    final TaskLink quess : concept.taskLinks) {
      final Task ques=quess.getTarget();
      if (((ques.sentence.isQuestion() && t.sentence.isJudgment()) || (ques.sentence.isGoal() && t.sentence.isJudgment()) || (ques.sentence.isQuest() && t.sentence.isGoal())) && ques.getTerm().hasVarQuery()) {
        boolean newAnswer=false;
        final Term[] u=new Term[]{ques.getTerm(),t.getTerm()};
        if (ques.sentence.term.hasVarQuery() && !t.getTerm().hasVarQuery() && Variables.unify(Symbols.VAR_QUERY,u)) {
          final Concept c=nal.memory.concept(t.getTerm());
          if (c == null) {
            continue;
          }
synchronized (c) {
            final List<Task> answers=ques.sentence.isQuest() ? c.desires : c.beliefs;
            if (c != null && answers.size() > 0) {
              final Task taskAnswer=answers.get(0);
              if (taskAnswer != null) {
                newAnswer|=trySolution(taskAnswer.sentence,ques,nal,false);
              }
            }
          }
        }
        if (newAnswer && ques.isInput()) {
          nal.memory.emit(Events.Answer.class,ques,ques.getBestSolution());
        }
      }
    }
  }
}

Fixed version (ground truth):
/** 
 * Recognize an added belief task as solution to what questions, those that contain query variable <p> called only in GeneralInferenceControl.insertTaskLink on concept selection
 * @param concept The concept which potentially outdated anticipations should be processed
 * @param t The belief task
 * @param nal The derivation context
 */
public static void ProcessWhatQuestionAnswer(final Concept concept,final Task t,final DerivationContext nal){
  if (!t.sentence.term.hasVarQuery() && t.sentence.isJudgment() || t.sentence.isGoal()) {
    for (    final TaskLink quess : concept.taskLinks) {
      final Task ques=quess.getTarget();
      if (((ques.sentence.isQuestion() && t.sentence.isJudgment()) || (ques.sentence.isGoal() && t.sentence.isJudgment()) || (ques.sentence.isQuest() && t.sentence.isGoal())) && ques.getTerm().hasVarQuery()) {
        boolean newAnswer=false;
        final Term[] u=new Term[]{ques.getTerm(),t.getTerm()};
        if (ques.sentence.term.hasVarQuery() && !t.getTerm().hasVarQuery() && Variables.unify(Symbols.VAR_QUERY,u)) {
          final Concept c=nal.memory.concept(t.getTerm());
          if (c == null) {
            continue;
          }
synchronized (c) {
            final List<Task> answers=ques.sentence.isQuest() ? c.desires : c.beliefs;
            if (c != null && answers.size() > 0) {
              final Task taskAnswer=answers.get(0);
              if (taskAnswer != null) {
                newAnswer|=trySolution(taskAnswer.sentence,ques,nal,false);
              }
            }
          }
        }
        if (newAnswer && ques.isInput()) {
          nal.memory.emit(Events.Answer.class,ques,ques.getBestSolution());
        }
      }
    }
  }
}