Program: 4619
Project: 4619
Buggy source:
@Override public void channelRead(ChannelHandlerContext ctx,Object msg) throws Exception {
  if (!(msg instanceof HttpRequest)) {
    ctx.fireChannelRead(msg);
    return;
  }
  HttpRequest request=(HttpRequest)msg;
  if (isBypassed(request)) {
    ctx.fireChannelRead(msg);
    return;
  }
  TokenState tokenState=validateAccessToken(request,ctx.channel());
  if (tokenState.isValid()) {
    ctx.fireChannelRead(msg);
    return;
  }
  try {
    HttpHeaders headers=new DefaultHttpHeaders();
    JsonObject jsonObject=new JsonObject();
    if (tokenState == TokenState.MISSING) {
      headers.add(HttpHeaderNames.WWW_AUTHENTICATE,String.format("String_Node_Str",realm));
      LOG.debug("String_Node_Str");
    }
 else {
      headers.add(HttpHeaderNames.WWW_AUTHENTICATE,String.format("String_Node_Str" + "String_Node_Str",realm,tokenState.getMsg()));
      jsonObject.addProperty("String_Node_Str","String_Node_Str");
      jsonObject.addProperty("String_Node_Str",tokenState.getMsg());
      LOG.debug("String_Node_Str",tokenState);
    }
    jsonObject.add("String_Node_Str",getAuthenticationURLs());
    ByteBuf content=Unpooled.copiedBuffer(jsonObject.toString(),StandardCharsets.UTF_8);
    HttpResponse response=new DefaultFullHttpResponse(HttpVersion.HTTP_1_1,HttpResponseStatus.UNAUTHORIZED,content);
    HttpUtil.setContentLength(response,content.readableBytes());
    response.headers().setAll(headers);
    response.headers().set(HttpHeaderNames.CONTENT_TYPE,"String_Node_Str");
    auditLogIfNeeded(request,response,ctx.channel());
    ctx.writeAndFlush(response).addListener(ChannelFutureListener.CLOSE);
  }
  finally {
    ReferenceCountUtil.release(msg);
  }
}

Fixed version (ground truth):
@Override public void channelRead(ChannelHandlerContext ctx,Object msg) throws Exception {
  if (!(msg instanceof HttpRequest)) {
    ctx.fireChannelRead(msg);
    return;
  }
  HttpRequest request=(HttpRequest)msg;
  if (isBypassed(request)) {
    ctx.fireChannelRead(msg);
    return;
  }
  TokenState tokenState=validateAccessToken(request,ctx.channel());
  if (tokenState.isValid()) {
    ctx.fireChannelRead(msg);
    return;
  }
  try {
    HttpHeaders headers=new DefaultHttpHeaders();
    JsonObject jsonObject=new JsonObject();
    if (tokenState == TokenState.MISSING) {
      headers.add(HttpHeaderNames.WWW_AUTHENTICATE,String.format("String_Node_Str",realm));
      LOG.debug("String_Node_Str");
    }
 else {
      headers.add(HttpHeaderNames.WWW_AUTHENTICATE,String.format("String_Node_Str" + "String_Node_Str",realm,tokenState.getMsg()));
      jsonObject.addProperty("String_Node_Str","String_Node_Str");
      jsonObject.addProperty("String_Node_Str",tokenState.getMsg());
      LOG.debug("String_Node_Str",tokenState);
    }
    jsonObject.add("String_Node_Str",getAuthenticationURLs());
    ByteBuf content=Unpooled.copiedBuffer(jsonObject.toString(),StandardCharsets.UTF_8);
    HttpResponse response=new DefaultFullHttpResponse(HttpVersion.HTTP_1_1,HttpResponseStatus.UNAUTHORIZED,content);
    HttpUtil.setContentLength(response,content.readableBytes());
    HttpUtil.setKeepAlive(response,false);
    response.headers().setAll(headers);
    response.headers().set(HttpHeaderNames.CONTENT_TYPE,"String_Node_Str");
    auditLogIfNeeded(request,response,ctx.channel());
    ctx.writeAndFlush(response).addListener(ChannelFutureListener.CLOSE);
  }
  finally {
    ReferenceCountUtil.release(msg);
  }
}