Program: 49499
Project: 49499
Buggy source:
public List<PoolUpdate> updatePools(Subscription sub,List<Pool> existingPools){
  log.info("String_Node_Str" + sub);
  log.info("String_Node_Str" + existingPools.size());
  PoolHelper helper=new PoolHelper(this.poolManager,this.productCache,null);
  List<PoolUpdate> poolsUpdated=new LinkedList<PoolUpdate>();
  Map<String,String> attributes=helper.getFlattenedAttributes(sub.getProduct());
  for (  Pool existingPool : existingPools) {
    log.info("String_Node_Str" + existingPool.getId());
    boolean datesChanged=(!sub.getStartDate().equals(existingPool.getStartDate())) || (!sub.getEndDate().equals(existingPool.getEndDate()));
    long expectedQuantity=sub.getQuantity() * sub.getProduct().getMultiplier();
    if (existingPool.hasAttribute("String_Node_Str") && existingPool.attributeEquals("String_Node_Str","String_Node_Str") && existingPool.hasProductAttribute("String_Node_Str")) {
      if (!attributes.containsKey("String_Node_Str")) {
        log.warn("String_Node_Str" + "String_Node_Str" + existingPool.getId());
        existingPool.setAttribute("String_Node_Str","String_Node_Str");
        expectedQuantity=0;
      }
 else {
        String virtLimitStr=attributes.get("String_Node_Str");
        if ("String_Node_Str".equals(virtLimitStr)) {
          expectedQuantity=existingPool.getQuantity() == 0 ? 0 : -1;
        }
 else {
          try {
            int virtLimit=Integer.parseInt(virtLimitStr);
            if (config.standalone()) {
              expectedQuantity=existingPool.getSourceEntitlement().getQuantity() * virtLimit;
            }
 else {
              long adjust=0L;
              for (              Pool derivedPool : existingPools) {
                String isDerived=derivedPool.getAttributeValue("String_Node_Str");
                if (isDerived == null) {
                  adjust=derivedPool.getExported();
                }
              }
              expectedQuantity=(expectedQuantity - adjust) * virtLimit;
            }
          }
 catch (          NumberFormatException nfe) {
            continue;
          }
        }
      }
    }
    boolean quantityChanged=!(expectedQuantity == existingPool.getQuantity());
    boolean productsChanged=helper.checkForChangedProducts(existingPool,sub);
    boolean prodAttrsChanged=helper.copyProductAttributesOntoPool(sub,existingPool);
    boolean orderDataChanged=helper.checkForOrderChanges(existingPool,sub);
    if (prodAttrsChanged) {
      log.info("String_Node_Str");
    }
    if (!(quantityChanged || datesChanged || productsChanged|| prodAttrsChanged|| orderDataChanged)) {
      log.info("String_Node_Str");
      continue;
    }
    if (quantityChanged) {
      this.updateQuantityChanged(existingPool,expectedQuantity);
    }
    if (orderDataChanged) {
      this.updateOrderChanged(existingPool,sub);
    }
    if (datesChanged) {
      this.updateDatesChanged(existingPool,sub);
    }
    if (productsChanged) {
      this.updateDatesChanged(existingPool,sub);
    }
    poolsUpdated.add(new org.candlepin.policy.js.pool.PoolUpdate(existingPool,datesChanged,quantityChanged,productsChanged,orderDataChanged));
  }
  return poolsUpdated;
}

Fixed version (ground truth):
public List<PoolUpdate> updatePools(Subscription sub,List<Pool> existingPools){
  log.info("String_Node_Str" + sub);
  log.info("String_Node_Str" + existingPools.size());
  PoolHelper helper=new PoolHelper(this.poolManager,this.productCache,null);
  List<PoolUpdate> poolsUpdated=new LinkedList<PoolUpdate>();
  Map<String,String> attributes=helper.getFlattenedAttributes(sub.getProduct());
  for (  Pool existingPool : existingPools) {
    log.info("String_Node_Str" + existingPool.getId());
    boolean datesChanged=(!sub.getStartDate().equals(existingPool.getStartDate())) || (!sub.getEndDate().equals(existingPool.getEndDate()));
    long expectedQuantity=sub.getQuantity() * sub.getProduct().getMultiplier();
    if (existingPool.hasAttribute("String_Node_Str") && existingPool.attributeEquals("String_Node_Str","String_Node_Str") && existingPool.hasProductAttribute("String_Node_Str")) {
      if (!attributes.containsKey("String_Node_Str")) {
        log.warn("String_Node_Str" + "String_Node_Str" + existingPool.getId());
        existingPool.setAttribute("String_Node_Str","String_Node_Str");
        expectedQuantity=0;
      }
 else {
        String virtLimitStr=attributes.get("String_Node_Str");
        if ("String_Node_Str".equals(virtLimitStr)) {
          expectedQuantity=existingPool.getQuantity() == 0 ? 0 : -1;
        }
 else {
          try {
            int virtLimit=Integer.parseInt(virtLimitStr);
            if (config.standalone()) {
              expectedQuantity=existingPool.getSourceEntitlement().getQuantity() * virtLimit;
            }
 else {
              long adjust=0L;
              for (              Pool derivedPool : existingPools) {
                String isDerived=derivedPool.getAttributeValue("String_Node_Str");
                if (isDerived == null) {
                  adjust=derivedPool.getExported();
                }
              }
              expectedQuantity=(expectedQuantity - adjust) * virtLimit;
            }
          }
 catch (          NumberFormatException nfe) {
            continue;
          }
        }
      }
    }
    boolean quantityChanged=!(expectedQuantity == existingPool.getQuantity());
    boolean productsChanged=helper.checkForChangedProducts(existingPool,sub);
    boolean prodAttrsChanged=helper.copyProductAttributesOntoPool(sub,existingPool);
    boolean orderDataChanged=helper.checkForOrderChanges(existingPool,sub);
    if (prodAttrsChanged) {
      log.info("String_Node_Str");
    }
    if (!(quantityChanged || datesChanged || productsChanged|| prodAttrsChanged|| orderDataChanged)) {
      log.info("String_Node_Str");
      continue;
    }
    if (quantityChanged) {
      this.updateQuantityChanged(existingPool,expectedQuantity);
    }
    if (orderDataChanged) {
      this.updateOrderChanged(existingPool,sub);
    }
    if (datesChanged) {
      this.updateDatesChanged(existingPool,sub);
    }
    if (productsChanged) {
      this.updateProductsChagned(existingPool,sub);
    }
    poolsUpdated.add(new org.candlepin.policy.js.pool.PoolUpdate(existingPool,datesChanged,quantityChanged,productsChanged,orderDataChanged));
  }
  return poolsUpdated;
}