Unable to `c.NoContent` inside HTTPErrorHandler

[andreyvital]

Well, this code was working before:

func echoHTTPErrorHandler(err error, c echo.Context) {
    switch err.(type) {
    case *echo.HTTPError:
        e := err.(*echo.HTTPError)

        log.Printf("%d %s", e.Code, e.Message)

        c.Response().WriteHeader(e.Code)
    default:
        log.Println(err)
    }
}

And even after changing c.Response().WriteHeader(e.Code) to c.NoContent(e.Code) which is a synthesized version as now I have access to echo.Context it still doesn't work.

The problem:

2016/03/19 19:40:14 404 Not Found
2016/03/19 19:40:14 http: multiple response.WriteHeader calls

And I get HTTP/1.1 200 OK instead of 404 Not Found.