Program: 47261
Project: 47261
Buggy source:
public RendererConfiguration(File f) throws ConfigurationException {
  configuration=new PropertiesConfiguration();
  configurationReader=new ConfigurationReader(configuration,false);
  configuration.setListDelimiter((char)0);
  if (f != null) {
    configuration.load(f);
  }
  mimes=new HashMap<>();
  String mimeTypes=getString(MIME_TYPES_CHANGES,null);
  if (StringUtils.isNotBlank(mimeTypes)) {
    StringTokenizer st=new StringTokenizer(mimeTypes,"String_Node_Str");
    while (st.hasMoreTokens()) {
      String mime_change=st.nextToken().trim();
      int equals=mime_change.indexOf("String_Node_Str");
      if (equals > -1) {
        String old=mime_change.substring(0,equals).trim().toLowerCase();
        String nw=mime_change.substring(equals + 1).trim().toLowerCase();
        mimes.put(old,nw);
      }
    }
  }
  DLNAPN=new HashMap<>();
  String DLNAPNchanges=getString(DLNA_PN_CHANGES,null);
  if (DLNAPNchanges != null) {
    LOGGER.trace("String_Node_Str" + DLNAPNchanges);
  }
  if (StringUtils.isNotBlank(DLNAPNchanges)) {
    StringTokenizer st=new StringTokenizer(DLNAPNchanges,"String_Node_Str");
    while (st.hasMoreTokens()) {
      String DLNAPN_change=st.nextToken().trim();
      int equals=DLNAPN_change.indexOf("String_Node_Str");
      if (equals > -1) {
        String old=DLNAPN_change.substring(0,equals).trim().toUpperCase();
        String nw=DLNAPN_change.substring(equals + 1).trim().toUpperCase();
        DLNAPN.put(old,nw);
      }
    }
  }
  if (f == null) {
    configuration.addProperty(MEDIAPARSERV2,true);
    configuration.addProperty(MEDIAPARSERV2_THUMB,true);
    configuration.addProperty(SUPPORTED,"String_Node_Str");
  }
  if (isMediaParserV2()) {
    formatConfiguration=new FormatConfiguration(configuration.getList(SUPPORTED));
  }
}

Fixed version (ground truth):
public RendererConfiguration(File f) throws ConfigurationException {
  configuration=new PropertiesConfiguration();
  configurationReader=new ConfigurationReader(configuration,false);
  configuration.setListDelimiter((char)0);
  if (f != null) {
    configuration.load(f);
  }
  mimes=new HashMap<>();
  String mimeTypes=getString(MIME_TYPES_CHANGES,null);
  if (StringUtils.isNotBlank(mimeTypes)) {
    StringTokenizer st=new StringTokenizer(mimeTypes,"String_Node_Str");
    while (st.hasMoreTokens()) {
      String mime_change=st.nextToken().trim();
      int equals=mime_change.indexOf("String_Node_Str");
      if (equals > -1) {
        String old=mime_change.substring(0,equals).trim().toLowerCase();
        String nw=mime_change.substring(equals + 1).trim().toLowerCase();
        mimes.put(old,nw);
      }
    }
  }
  charMap=new HashMap<>();
  String ch=getString(CHARMAP,null);
  if (StringUtils.isNotBlank(ch)) {
    StringTokenizer st=new StringTokenizer(ch,"String_Node_Str");
    String org="String_Node_Str";
    while (st.hasMoreTokens()) {
      String tok=st.nextToken().trim();
      if (StringUtils.isBlank(tok)) {
        continue;
      }
      if (StringUtils.isBlank(org)) {
        org=tok;
      }
 else {
        charMap.put(org,tok);
        org="String_Node_Str";
      }
    }
  }
  DLNAPN=new HashMap<>();
  String DLNAPNchanges=getString(DLNA_PN_CHANGES,null);
  if (DLNAPNchanges != null) {
    LOGGER.trace("String_Node_Str" + DLNAPNchanges);
  }
  if (StringUtils.isNotBlank(DLNAPNchanges)) {
    StringTokenizer st=new StringTokenizer(DLNAPNchanges,"String_Node_Str");
    while (st.hasMoreTokens()) {
      String DLNAPN_change=st.nextToken().trim();
      int equals=DLNAPN_change.indexOf("String_Node_Str");
      if (equals > -1) {
        String old=DLNAPN_change.substring(0,equals).trim().toUpperCase();
        String nw=DLNAPN_change.substring(equals + 1).trim().toUpperCase();
        DLNAPN.put(old,nw);
      }
    }
  }
  if (f == null) {
    configuration.addProperty(MEDIAPARSERV2,true);
    configuration.addProperty(MEDIAPARSERV2_THUMB,true);
    configuration.addProperty(SUPPORTED,"String_Node_Str");
  }
  if (isMediaParserV2()) {
    formatConfiguration=new FormatConfiguration(configuration.getList(SUPPORTED));
  }
}