Program: 167601
Project: 167601
Buggy source:
/** 
 * Render message as spannable string
 * @return
 */
public SpannableString render(Context context){
  Settings settings=new Settings(context);
  if (canvas == null) {
    String prefix=hasIcon() && settings.showIcons() ? "String_Node_Str" : "String_Node_Str";
    String nick=hasSender() ? sender + "String_Node_Str" : "String_Node_Str";
    String timestamp=settings.showTimestamp() ? renderTimeStamp(settings.use24hFormat(),settings.includeSeconds()) : "String_Node_Str";
    canvas=new SpannableString(prefix + timestamp + nick);
    SpannableString renderedText;
    if (settings.showMircColors()) {
      renderedText=MircColors.toSpannable(text);
    }
 else {
      renderedText=new SpannableString(MircColors.removeStyleAndColors(text));
    }
    if (settings.showGraphicalSmilies()) {
      renderedText=Smilies.toSpannable(renderedText,context);
    }
    canvas=new SpannableString(TextUtils.concat(canvas,renderedText));
    if (hasSender()) {
      int start=(prefix + timestamp).length() + 1;
      int end=start + sender.length();
      if (settings.showColorsNick()) {
        canvas.setSpan(new ForegroundColorSpan(getSenderColor()),start,end,Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
      }
    }
    if (hasIcon() && settings.showIcons()) {
      Drawable drawable=context.getResources().getDrawable(icon);
      drawable.setBounds(0,0,drawable.getIntrinsicWidth(),drawable.getIntrinsicHeight());
      canvas.setSpan(new ImageSpan(drawable,ImageSpan.ALIGN_BOTTOM),0,1,Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
    }
    if (hasColor() && settings.showColors()) {
      ForegroundColorSpan[] spans=canvas.getSpans(0,canvas.length(),ForegroundColorSpan.class);
      int start=0;
      for (int i=0; i < spans.length; i++) {
        canvas.setSpan(new ForegroundColorSpan(color),start,canvas.getSpanStart(spans[i]),Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
        start=canvas.getSpanEnd(spans[i]);
      }
      canvas.setSpan(new ForegroundColorSpan(color),start,canvas.length(),Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
    }
  }
  return canvas;
}

Fixed version (ground truth):
/** 
 * Render message as spannable string
 * @return
 */
public SpannableString render(Context context){
  Settings settings=new Settings(context);
  if (canvas == null) {
    String prefix=hasIcon() && settings.showIcons() ? "String_Node_Str" : "String_Node_Str";
    String nick=hasSender() ? "String_Node_Str" + sender + "String_Node_Str" : "String_Node_Str";
    String timestamp=settings.showTimestamp() ? renderTimeStamp(settings.use24hFormat(),settings.includeSeconds()) : "String_Node_Str";
    canvas=new SpannableString(prefix + timestamp + nick);
    SpannableString renderedText;
    if (settings.showMircColors()) {
      renderedText=MircColors.toSpannable(text);
    }
 else {
      renderedText=new SpannableString(MircColors.removeStyleAndColors(text));
    }
    if (settings.showGraphicalSmilies()) {
      renderedText=Smilies.toSpannable(renderedText,context);
    }
    canvas=new SpannableString(TextUtils.concat(canvas,renderedText));
    if (hasSender()) {
      int start=(prefix + timestamp).length() + 1;
      int end=start + sender.length();
      if (settings.showColorsNick()) {
        canvas.setSpan(new ForegroundColorSpan(getSenderColor()),start,end,Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
      }
    }
    if (hasIcon() && settings.showIcons()) {
      Drawable drawable=context.getResources().getDrawable(icon);
      drawable.setBounds(0,0,drawable.getIntrinsicWidth(),drawable.getIntrinsicHeight());
      canvas.setSpan(new ImageSpan(drawable,ImageSpan.ALIGN_BOTTOM),0,1,Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
    }
    if (hasColor() && settings.showColors()) {
      ForegroundColorSpan[] spans=canvas.getSpans(0,canvas.length(),ForegroundColorSpan.class);
      int start=0;
      for (int i=0; i < spans.length; i++) {
        canvas.setSpan(new ForegroundColorSpan(color),start,canvas.getSpanStart(spans[i]),Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
        start=canvas.getSpanEnd(spans[i]);
      }
      canvas.setSpan(new ForegroundColorSpan(color),start,canvas.length(),Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
    }
  }
  return canvas;
}