u.initAt(mp.vdsoPC, mp.vdsoSP, 0, gp, unwindSilentErrors|unwindJumpStack)
	} else {
		u.initAt(pc, sp, lr, gp, unwindSilentErrors|unwindTrap|unwindJumpStack)
	}
	n += tracebackPCs(&u, 0, stk[n:])

	if n <= 0 {
		// Normal traceback is impossible or has failed.
		// Account it against abstract "System" or "GC".
		n = 2
		if inVDSOPage(pc) {

    ```
    """

    def __init__(
        self: AppType,
        *,
        debug: Annotated[
            bool,
            Doc(
                """
                Boolean indicating if debug tracebacks should be returned on server
                errors.

                Read more in the
                [Starlette docs for Applications](https://www.starlette.io/applications/#instantiating-the-application).