Make logger to print stack trace in file

[stepanleas]

When an error with level panic occurs, it does not print the stack trace. It still appears in the terminal output, but is not written in the file.

{"timestamp":"2023-12-09T13:56:15.436815815+02:00","level":"ERROR","message":"Response: 500 Server Error - interface conversion: error is *fmt.wrapError, not *app_error.ApplicationError","service":"app-logger","httpRequest":{"url":"http://localhost:8000/api/v1/hotels","method":"GET","path":"/api/v1/hotels","remoteIP":"[::1]:50340","proto":"HTTP/1.1","requestID":"stepan-ThinkPad-L15-Gen-2/f8pOxWi02A-000002"},"stacktrace":"#","panic":"interface conversion: error is *fmt.wrapError, not *app_error.ApplicationError","httpResponse":{"status":500,"bytes":0,"elapsed":1.042674,"body":""}}

const YYYYMMDD = "2006-01-02"

func newLogger() *httplog.Logger {
    return httplog.NewLogger("app-logger", httplog.Options{
        JSON:             true,
        LogLevel:         slog.LevelError,
        Concise:          true,
        MessageFieldName: "message",
        Tags: map[string]string{
            "version": "v1.0-81aa4244d9fc8076a",
            "env":     "dev",
        },
        QuietDownRoutes: []string{
            "/",
            "/ping",
        },
        QuietDownPeriod: 10 * time.Second,
        Writer:          newWriter(),
    })
}

func newWriter() io.Writer {
    fileNamePath := fmt.Sprintf("logs/%s.log", time.Now().UTC().Format(YYYYMMDD))
    errorLogFile, err := os.OpenFile(fileNamePath, os.O_CREATE|os.O_WRONLY|os.O_APPEND, 0666)
    if err != nil {
        log.Fatal("Error opening file: ", err)
    }

    return io.MultiWriter(os.Stdout, errorLogFile)
}

In httplog.go file there is this function:

func (l *RequestLoggerEntry) Panic(v interface{}, stack []byte) {
    stacktrace := "#"
    if l.Options.JSON {
        stacktrace = string(stack)
    }
    l.Logger = *l.Logger.With(
        slog.Attr{
            Key:   "stacktrace",
            Value: slog.StringValue(stacktrace)},
        slog.Attr{
            Key:   "panic",
            Value: slog.StringValue(fmt.Sprintf("%+v", v)),
        })

    l.msg = fmt.Sprintf("%+v", v)

    if !l.Options.JSON {
        middleware.PrintPrettyStack(v)
    }
}

I examined a bit and it seems that the l.Options are not the same that we passed to httplog.NewLogger function. They come from RequestLoggerEntry struct, not from Logger struct.

Is there a way to enable it that I don't know?