Program: 47068
Project: 47068
Buggy source:
private ArrayList<ReleaseRecord> parseRelease(final Document document,final CoverArtArchiveTagInfo tagInfo){
  NodeList nodeList=document.getDocumentElement().getElementsByTagName("String_Node_Str");
  if (nodeList.getLength() < 1) {
    return null;
  }
  Element listElement=(Element)nodeList.item(0);
  nodeList=listElement.getElementsByTagName("String_Node_Str");
  if (nodeList.getLength() < 1) {
    return null;
  }
  Pattern pattern=Pattern.compile("String_Node_Str");
  ArrayList<ReleaseRecord> releaseList=new ArrayList<>(nodeList.getLength());
  for (int i=0; i < nodeList.getLength(); i++) {
    if (nodeList.item(i) instanceof Element) {
      Element releaseElement=(Element)nodeList.item(i);
      ReleaseRecord release=new ReleaseRecord();
      release.id=releaseElement.getAttribute("String_Node_Str");
      try {
        release.score=Integer.parseInt(releaseElement.getAttribute("String_Node_Str"));
      }
 catch (      NumberFormatException e) {
        release.score=0;
      }
      try {
        release.title=getChildElement(releaseElement,"String_Node_Str").getTextContent();
      }
 catch (      NullPointerException e) {
        release.title=null;
      }
      Element releaseGroup=getChildElement(releaseElement,"String_Node_Str");
      if (releaseGroup != null) {
        try {
          release.type=ReleaseType.valueOf(getChildElement(releaseGroup,"String_Node_Str").getTextContent());
        }
 catch (        IllegalArgumentException|NullPointerException e) {
          release.type=null;
        }
      }
      Element releaseYear=getChildElement(releaseElement,"String_Node_Str");
      if (releaseYear != null) {
        release.year=releaseYear.getTextContent();
        Matcher matcher=pattern.matcher(release.year);
        if (matcher.find()) {
          release.year=matcher.group();
        }
 else {
          release.year=null;
        }
      }
 else {
        release.year=null;
      }
      Element artists=getChildElement(releaseElement,"String_Node_Str");
      if (artists != null && artists.getChildNodes().getLength() > 0) {
        NodeList artistList=artists.getChildNodes();
        for (int j=0; j < artistList.getLength(); j++) {
          Node node=artistList.item(j);
          if (node.getNodeType() == Node.ELEMENT_NODE && node.getNodeName().equals("String_Node_Str") && node instanceof Element) {
            Element artistElement=getChildElement((Element)node,"String_Node_Str");
            if (artistElement != null) {
              Element artistNameElement=getChildElement(artistElement,"String_Node_Str");
              if (artistNameElement != null) {
                release.artists.add(artistNameElement.getTextContent());
              }
            }
          }
        }
      }
      if (StringUtil.hasValue(release.id)) {
        releaseList.add(release);
      }
    }
  }
  return releaseList;
}

Fixed version (ground truth):
private ArrayList<ReleaseRecord> parseRelease(final Document document,final CoverArtArchiveTagInfo tagInfo){
  NodeList nodeList=document.getDocumentElement().getElementsByTagName("String_Node_Str");
  if (nodeList.getLength() < 1) {
    return null;
  }
  Element listElement=(Element)nodeList.item(0);
  nodeList=listElement.getElementsByTagName("String_Node_Str");
  if (nodeList.getLength() < 1) {
    return null;
  }
  Pattern pattern=Pattern.compile("String_Node_Str");
  ArrayList<ReleaseRecord> releaseList=new ArrayList<>(nodeList.getLength());
  int nodeListLength=nodeList.getLength();
  for (int i=0; i < nodeListLength; i++) {
    if (nodeList.item(i) instanceof Element) {
      Element releaseElement=(Element)nodeList.item(i);
      ReleaseRecord release=new ReleaseRecord();
      release.id=releaseElement.getAttribute("String_Node_Str");
      try {
        release.score=Integer.parseInt(releaseElement.getAttribute("String_Node_Str"));
      }
 catch (      NumberFormatException e) {
        release.score=0;
      }
      try {
        release.title=getChildElement(releaseElement,"String_Node_Str").getTextContent();
      }
 catch (      NullPointerException e) {
        release.title=null;
      }
      Element releaseGroup=getChildElement(releaseElement,"String_Node_Str");
      if (releaseGroup != null) {
        try {
          release.type=ReleaseType.valueOf(getChildElement(releaseGroup,"String_Node_Str").getTextContent());
        }
 catch (        IllegalArgumentException|NullPointerException e) {
          release.type=null;
        }
      }
      Element releaseYear=getChildElement(releaseElement,"String_Node_Str");
      if (releaseYear != null) {
        release.year=releaseYear.getTextContent();
        Matcher matcher=pattern.matcher(release.year);
        if (matcher.find()) {
          release.year=matcher.group();
        }
 else {
          release.year=null;
        }
      }
 else {
        release.year=null;
      }
      Element artists=getChildElement(releaseElement,"String_Node_Str");
      if (artists != null && artists.getChildNodes().getLength() > 0) {
        NodeList artistList=artists.getChildNodes();
        for (int j=0; j < artistList.getLength(); j++) {
          Node node=artistList.item(j);
          if (node.getNodeType() == Node.ELEMENT_NODE && node.getNodeName().equals("String_Node_Str") && node instanceof Element) {
            Element artistElement=getChildElement((Element)node,"String_Node_Str");
            if (artistElement != null) {
              Element artistNameElement=getChildElement(artistElement,"String_Node_Str");
              if (artistNameElement != null) {
                release.artists.add(artistNameElement.getTextContent());
              }
            }
          }
        }
      }
      if (StringUtil.hasValue(release.id)) {
        releaseList.add(release);
      }
    }
  }
  return releaseList;
}