Program: 90086
Project: 90086
Buggy source:
/** 
 * The physical locations is referring to the position in the real world where the computers are located. One physical location can contain many machines.
 * @param elem The root of this branch in the XML structure.
 * @param parentSettings The settings of the parent (it-config).
 * @param param The parameters of the parent (it-config).
 * @param netarchiveSuiteSource The name of the NetarchiveSuite file.
 * @param logProp The logging property file.
 * @param securityPolicy The security policy file.
 * @param dbFile The name of the database.
 * @param resetDir Whether the temporary directory should be reset.
 */
public PhysicalLocation(Element elem,XmlStructure parentSettings,Parameters param,String netarchiveSuiteSource,File logProp,File securityPolicy,File dbFile,boolean resetDir){
  ArgumentNotValid.checkNotNull(elem,"String_Node_Str");
  ArgumentNotValid.checkNotNull(parentSettings,"String_Node_Str");
  ArgumentNotValid.checkNotNull(param,"String_Node_Str");
  ArgumentNotValid.checkNotNullOrEmpty(netarchiveSuiteSource,"String_Node_Str");
  ArgumentNotValid.checkNotNull(logProp,"String_Node_Str");
  ArgumentNotValid.checkNotNull(securityPolicy,"String_Node_Str");
  ArgumentNotValid.checkNotNull(resetDir,"String_Node_Str");
  settings=new XmlStructure(parentSettings.getRoot());
  physLocRoot=elem;
  machineParameters=new Parameters(param);
  netarchiveSuiteFileName=netarchiveSuiteSource;
  logPropFile=logProp;
  securityPolicyFile=securityPolicy;
  databaseFile=dbFile;
  resetDirectory=resetDir;
  Element tmpSet=physLocRoot.element(Constants.SETTINGS_BRANCH);
  if (tmpSet != null) {
    settings.overWrite(tmpSet);
  }
  machineParameters.newParameters(physLocRoot);
  extractVariables();
  extractMachines();
}

Fixed version (ground truth):
/** 
 * The physical locations is referring to the position in the real world where the computers are located. One physical location can contain many machines.
 * @param elem The root of this branch in the XML structure.
 * @param parentSettings The settings of the parent (it-config).
 * @param param The parameters of the parent (it-config).
 * @param netarchiveSuiteSource The name of the NetarchiveSuite file.
 * @param logProp The logging property file.
 * @param securityPolicy The security policy file.
 * @param dbFile The name of the database.
 * @param resetDir Whether the temporary directory should be reset.
 */
public PhysicalLocation(Element elem,XmlStructure parentSettings,Parameters param,String netarchiveSuiteSource,File logProp,File securityPolicy,File dbFile,boolean resetDir){
  ArgumentNotValid.checkNotNull(elem,"String_Node_Str");
  ArgumentNotValid.checkNotNull(parentSettings,"String_Node_Str");
  ArgumentNotValid.checkNotNull(param,"String_Node_Str");
  ArgumentNotValid.checkNotNullOrEmpty(netarchiveSuiteSource,"String_Node_Str");
  ArgumentNotValid.checkNotNull(logProp,"String_Node_Str");
  ArgumentNotValid.checkNotNull(securityPolicy,"String_Node_Str");
  ArgumentNotValid.checkNotNull(resetDir,"String_Node_Str");
  settings=new XmlStructure(parentSettings.getRoot());
  physLocRoot=elem;
  machineParameters=new Parameters(param);
  netarchiveSuiteFileName=netarchiveSuiteSource;
  logPropFile=logProp;
  securityPolicyFile=securityPolicy;
  databaseFile=dbFile;
  resetDirectory=resetDir;
  Element tmpSet=physLocRoot.element(Constants.COMPLETE_SETTINGS_BRANCH);
  if (tmpSet != null) {
    settings.overWrite(tmpSet);
  }
  machineParameters.newParameters(physLocRoot);
  extractVariables();
  extractMachines();
}