Program: 71674
Project: 71674
Buggy source:
private void outputCSSStyles(String defaultStyleName,StringBuffer defaultStyleBuffer,Report reportDesign,ReportDesignHandle designHandle){
  writer.openTag(HTMLTags.TAG_STYLE);
  writer.attribute(HTMLTags.ATTR_TYPE,"String_Node_Str");
  IStyle style;
  StringBuffer styleBuffer=new StringBuffer();
  if (report == null) {
    logger.log(Level.WARNING,"String_Node_Str");
  }
 else {
    String styleNamePrefix;
    if (null != htmlIDNamespace) {
      styleNamePrefix="String_Node_Str" + htmlIDNamespace;
    }
 else {
      styleNamePrefix="String_Node_Str";
    }
    writer.style(styleNamePrefix + defaultStyleName,defaultStyleBuffer.toString());
    Map styles=reportDesign.getStyles();
    Iterator iter=styles.entrySet().iterator();
    while (iter.hasNext()) {
      Map.Entry entry=(Map.Entry)iter.next();
      String styleName=(String)entry.getKey();
      style=(IStyle)entry.getValue();
      styleBuffer.setLength(0);
      htmlEmitter.buildStyle(styleBuffer,style);
      if (styleBuffer.length() > 0) {
        writer.style(styleNamePrefix + styleName,styleBuffer.toString());
        outputtedStyles.add(styleName);
      }
    }
  }
  writer.closeTag(HTMLTags.TAG_STYLE);
  hasCsslinks=false;
  if (designHandle != null) {
    Iterator iter=designHandle.includeCssesIterator();
    while (iter.hasNext()) {
      IncludedCssStyleSheetHandle cssStyleSheetHandle=(IncludedCssStyleSheetHandle)iter.next();
      String href=cssStyleSheetHandle.getExternalCssURI();
      if (href != null) {
        hasCsslinks=true;
        writer.openTag(HTMLTags.TAG_LINK);
        writer.attribute(HTMLTags.ATTR_REL,"String_Node_Str");
        writer.attribute(HTMLTags.ATTR_TYPE,"String_Node_Str");
        writer.attribute(HTMLTags.ATTR_HREF,href);
        writer.closeTag(HTMLTags.TAG_LINK);
      }
    }
  }
}

Fixed version (ground truth):
private void outputCSSStyles(String defaultStyleName,StringBuffer defaultStyleBuffer,Report reportDesign,ReportDesignHandle designHandle){
  writer.openTag(HTMLTags.TAG_STYLE);
  writer.attribute(HTMLTags.ATTR_TYPE,"String_Node_Str");
  IStyle style;
  StringBuffer styleBuffer=new StringBuffer();
  if (report == null) {
    logger.log(Level.WARNING,"String_Node_Str");
  }
 else {
    String styleNamePrefix;
    if (null != htmlIDNamespace) {
      styleNamePrefix="String_Node_Str" + htmlIDNamespace;
    }
 else {
      styleNamePrefix="String_Node_Str";
    }
    writer.style(styleNamePrefix + defaultStyleName,defaultStyleBuffer.toString());
    Map styles=reportDesign.getStyles();
    Iterator iter=styles.entrySet().iterator();
    while (iter.hasNext()) {
      Map.Entry entry=(Map.Entry)iter.next();
      String styleName=(String)entry.getKey();
      style=(IStyle)entry.getValue();
      styleBuffer.setLength(0);
      htmlEmitter.buildStyle(styleBuffer,style);
      if (styleBuffer.length() > 0) {
        writer.style(styleNamePrefix + styleName,styleBuffer.toString());
        outputtedStyles.add(styleName);
      }
    }
  }
  writer.closeTag(HTMLTags.TAG_STYLE);
  hasCsslinks=false;
  if (designHandle != null) {
    List externalCsses=designHandle.getAllExternalIncludedCsses();
    if (null != externalCsses) {
      Iterator iter=externalCsses.iterator();
      while (iter.hasNext()) {
        IncludedCssStyleSheetHandle cssStyleSheetHandle=(IncludedCssStyleSheetHandle)iter.next();
        String href=cssStyleSheetHandle.getExternalCssURI();
        if (href != null) {
          hasCsslinks=true;
          writer.openTag(HTMLTags.TAG_LINK);
          writer.attribute(HTMLTags.ATTR_REL,"String_Node_Str");
          writer.attribute(HTMLTags.ATTR_TYPE,"String_Node_Str");
          writer.attribute(HTMLTags.ATTR_HREF,href);
          writer.closeTag(HTMLTags.TAG_LINK);
        }
      }
    }
  }
}