Function handler

scrapy/utils/signal.py:189–210

(
            receiver: Callable[..., Any],
        )

    for receiver in liveReceivers(getAllReceivers(sender, signal)):

        async def handler(
            receiver: Callable[..., Any],
        ) -> tuple[Callable[..., Any], TypingAny]:
            result: TypingAny
            try:
                result = await ensure_awaitable(
                    robustApply(
                        receiver, *arguments, signal=signal, sender=sender, **named
                    ),
                    _warn=global_object_name(receiver),
                )
            except dont_log as ex:  # pylint: disable=catching-non-exception
                result = ex
            except Exception as ex:
                logger.error(
                    "Error caught on signal handler: %(receiver)s",
                    {"receiver": receiver},
                    exc_info=True,
                    extra={"spider": spider},
                )
                result = ex
            return (receiver, result)

        handlers.append(handler(receiver))