Program: 4245
Project: 4245
Buggy source:
/** 
 * If date is not match, will return next closest match. If date is match, will return this date.
 * @param date - reference ZonedDateTime instance - never null;
 * @return ZonedDateTime instance, never null. Value obeys logic specified above.
 * @throws NoSuchValueException
 */
private ZonedDateTime nextClosestMatch(ZonedDateTime date) throws NoSuchValueException {
  List<Integer> year=yearsValueGenerator.generateCandidates(date.getYear(),date.getYear());
  TimeNode days=null;
  int lowestMonth=months.getValues().get(0);
  int lowestHour=hours.getValues().get(0);
  int lowestMinute=minutes.getValues().get(0);
  int lowestSecond=seconds.getValues().get(0);
  NearestValue nearestValue;
  ZonedDateTime newDate;
  if (year.isEmpty()) {
    int newYear=yearsValueGenerator.generateNextValue(date.getYear());
    try {
      days=generateDays(cronDefinition,ZonedDateTime.of(LocalDateTime.of(newYear,lowestMonth,1,0,0),date.getZone()));
    }
 catch (    NoDaysForMonthException e) {
      return nextClosestMatch(date.plusMonths(1));
    }
    return initDateTime(yearsValueGenerator.generateNextValue(date.getYear()),lowestMonth,days.getValues().get(0),lowestHour,lowestMinute,lowestSecond,date.getZone(),true);
  }
  if (!months.getValues().contains(date.getMonthValue())) {
    nearestValue=months.getNextValue(date.getMonthValue(),0);
    int nextMonths=nearestValue.getValue();
    if (nearestValue.getShifts() > 0) {
      newDate=ZonedDateTime.of(LocalDateTime.of(date.getYear(),1,1,0,0,0),date.getZone()).plusYears(nearestValue.getShifts());
      return nextClosestMatch(newDate);
    }
    if (nearestValue.getValue() < date.getMonthValue()) {
      date=date.plusYears(1);
    }
    try {
      days=generateDays(cronDefinition,ZonedDateTime.of(LocalDateTime.of(date.getYear(),nextMonths,1,0,0),date.getZone()));
    }
 catch (    NoDaysForMonthException e) {
      return nextClosestMatch(date.plusMonths(1));
    }
    return initDateTime(date.getYear(),nextMonths,days.getValues().get(0),lowestHour,lowestMinute,lowestSecond,date.getZone(),true);
  }
  try {
    days=generateDays(cronDefinition,date);
  }
 catch (  NoDaysForMonthException e) {
    return nextClosestMatch(date.plusMonths(1));
  }
  if (!days.getValues().contains(date.getDayOfMonth())) {
    nearestValue=days.getNextValue(date.getDayOfMonth(),0);
    if (nearestValue.getShifts() > 0) {
      newDate=ZonedDateTime.of(LocalDateTime.of(date.getYear(),date.getMonthValue(),1,0,0,0),date.getZone()).plusMonths(nearestValue.getShifts());
      return nextClosestMatch(newDate);
    }
    if (nearestValue.getValue() < date.getDayOfMonth()) {
      date=date.plusMonths(1);
    }
    return initDateTime(date.getYear(),date.getMonthValue(),nearestValue.getValue(),lowestHour,lowestMinute,lowestSecond,date.getZone(),true);
  }
  if (!hours.getValues().contains(date.getHour())) {
    nearestValue=hours.getNextValue(date.getHour(),0);
    int nextHours=nearestValue.getValue();
    if (nearestValue.getShifts() > 0) {
      newDate=ZonedDateTime.of(LocalDateTime.of(date.getYear(),date.getMonthValue(),date.getDayOfMonth(),0,0,0),date.getZone()).plusDays(nearestValue.getShifts());
      return nextClosestMatch(newDate);
    }
    if (nearestValue.getValue() < date.getHour()) {
      date=date.plusDays(1);
    }
    return initDateTime(date.getYear(),date.getMonthValue(),date.getDayOfMonth(),nextHours,lowestMinute,lowestSecond,date.getZone(),true);
  }
  if (!minutes.getValues().contains(date.getMinute())) {
    nearestValue=minutes.getNextValue(date.getMinute(),0);
    int nextMinutes=nearestValue.getValue();
    if (nearestValue.getShifts() > 0) {
      newDate=ZonedDateTime.of(LocalDateTime.of(date.getYear(),date.getMonthValue(),date.getDayOfMonth(),date.getHour(),0,0),date.getZone()).plusHours(nearestValue.getShifts());
      return nextClosestMatch(newDate);
    }
    if (nearestValue.getValue() < date.getMinute()) {
      date=date.plusHours(1);
    }
    return initDateTime(date.getYear(),date.getMonthValue(),date.getDayOfMonth(),date.getHour(),nextMinutes,lowestSecond,date.getZone(),true);
  }
  if (!seconds.getValues().contains(date.getSecond())) {
    nearestValue=seconds.getNextValue(date.getSecond(),0);
    int nextSeconds=nearestValue.getValue();
    if (nearestValue.getShifts() > 0) {
      newDate=ZonedDateTime.of(LocalDateTime.of(date.getYear(),date.getMonthValue(),date.getDayOfMonth(),date.getHour(),date.getMinute(),0),date.getZone()).plusMinutes(nearestValue.getShifts());
      return nextClosestMatch(newDate);
    }
    if (nearestValue.getValue() < date.getSecond()) {
      date=date.plusMinutes(1);
    }
    return initDateTime(date.getYear(),date.getMonthValue(),date.getDayOfMonth(),date.getHour(),date.getMinute(),nextSeconds,date.getZone(),true);
  }
  return date;
}

Fixed version (ground truth):
/** 
 * If date is not match, will return next closest match. If date is match, will return this date.
 * @param date - reference ZonedDateTime instance - never null;
 * @return ZonedDateTime instance, never null. Value obeys logic specified above.
 * @throws NoSuchValueException
 */
private ZonedDateTime nextClosestMatch(ZonedDateTime date) throws NoSuchValueException {
  ExecutionTimeResult newdate=new ExecutionTimeResult(date,false);
  do {
    newdate=potentialNextClosestMatch(newdate.getTime());
  }
 while (!newdate.isMatch());
  return newdate.getTime();
}