Program: 51208
Project: 51208
Buggy source:
public static XMLStreamReader createReader(Reader reader,JSONConfiguration config,String rootName,boolean readingList){
switch (config.getNotation()) {
case NATURAL:
    try {
      final JsonParser rawParser=new JsonFactory().createJsonParser(reader);
      final JsonParser nonListParser=config.isRootUnwrapping() ? JacksonRootAddingParser.createRootAddingParser(rawParser,rootName) : rawParser;
      if (!readingList) {
        return new Jackson2StaxReader(nonListParser);
      }
 else {
        return new Jackson2StaxReader(JacksonRootAddingParser.createRootAddingParser(nonListParser,"String_Node_Str"));
      }
    }
 catch (    Exception ex) {
      Logger.getLogger(JSONUnmarshallerImpl.class.getName()).log(Level.SEVERE,null,ex);
    }
  break;
case MAPPED:
try {
  return new JsonXmlStreamReader(reader,rootName,config);
}
 catch (IOException ex) {
  Logger.getLogger(JSONUnmarshallerImpl.class.getName()).log(Level.SEVERE,null,ex);
}
break;
case MAPPED_JETTISON:
try {
Configuration jmConfig;
if (null == config.getXml2JsonNs()) {
jmConfig=new Configuration();
}
 else {
jmConfig=new Configuration(config.getXml2JsonNs());
}
return new MappedXMLStreamReader(new JSONObject(new JSONTokener(readFromAsString(reader))),new MappedNamespaceConvention(jmConfig));
}
 catch (Exception ex) {
Logger.getLogger(JSONUnmarshallerImpl.class.getName()).log(Level.SEVERE,null,ex);
}
break;
case BADGERFISH:
try {
return new BadgerFishXMLStreamReader(new JSONObject(new JSONTokener(readFromAsString(reader))));
}
 catch (Exception ex) {
Logger.getLogger(JSONUnmarshallerImpl.class.getName()).log(Level.SEVERE,null,ex);
}
break;
}
return null;
}

Fixed version (ground truth):
public static XMLStreamReader createReader(Reader reader,JSONConfiguration config,String rootName,boolean readingList){
switch (config.getNotation()) {
case NATURAL:
    try {
      final JsonParser rawParser=new JsonFactory().createJsonParser(reader);
      final JsonParser nonListParser=config.isRootUnwrapping() ? JacksonRootAddingParser.createRootAddingParser(rawParser,rootName) : rawParser;
      if (!readingList) {
        return new Jackson2StaxReader(nonListParser,config);
      }
 else {
        return new Jackson2StaxReader(JacksonRootAddingParser.createRootAddingParser(nonListParser,"String_Node_Str"),config);
      }
    }
 catch (    Exception ex) {
      Logger.getLogger(JSONUnmarshallerImpl.class.getName()).log(Level.SEVERE,null,ex);
    }
  break;
case MAPPED:
try {
  return new JsonXmlStreamReader(reader,rootName,config);
}
 catch (IOException ex) {
  Logger.getLogger(JSONUnmarshallerImpl.class.getName()).log(Level.SEVERE,null,ex);
}
break;
case MAPPED_JETTISON:
try {
Configuration jmConfig;
if (null == config.getXml2JsonNs()) {
jmConfig=new Configuration();
}
 else {
jmConfig=new Configuration(config.getXml2JsonNs());
}
return new MappedXMLStreamReader(new JSONObject(new JSONTokener(readFromAsString(reader))),new MappedNamespaceConvention(jmConfig));
}
 catch (Exception ex) {
Logger.getLogger(JSONUnmarshallerImpl.class.getName()).log(Level.SEVERE,null,ex);
}
break;
case BADGERFISH:
try {
return new BadgerFishXMLStreamReader(new JSONObject(new JSONTokener(readFromAsString(reader))));
}
 catch (Exception ex) {
Logger.getLogger(JSONUnmarshallerImpl.class.getName()).log(Level.SEVERE,null,ex);
}
break;
}
return null;
}