`!d discord` not working correctly

[janine9vn]

Invoking !d discord to lookup the the discord.py documentation is currently not working as intended. It causes the bot start typing and never produces an output.

It seems to be a specific issue with the discord look-up in particular, but more work into what specifically the error could be caused by is needed. The logging present currently isn't enough to trace down the specific issue in production.

It could possibly be an issue with the refresh docs method here:

bot/bot/exts/info/doc/_cog.py

Lines 211 to 229 in ad6c7f8

	async def refresh_inventories(self) -> None:
	"""Refresh internal documentation inventories."""
	self.refresh_event.clear()
	await self.symbol_get_event.wait()
	log.debug("Refreshing documentation inventory...")
	self.inventory_scheduler.cancel_all()
	self.base_urls.clear()
	self.doc_symbols.clear()
	self.renamed_symbols.clear()
	await self.item_fetcher.clear()
	coros = [
	self.update_or_reschedule_inventory(package["package"], package["base_url"], package["inventory_url"])
	for package in await self.bot.api_client.get("bot/documentation-links")
	]
	await asyncio.gather(*coros)
	log.debug("Finished inventory refresh.")
	self.refresh_event.set()

That method does not check if a refresh is already underway.