A reply to https://gist.github.com/creationix/19b9d8cefe55d946807c#file-helper-lua

shittyscheduler.lua

local coros = setmetatable({}, {__mode="kv"})
local function new_thread(func, onerror)
	local co = coroutine.create(func)
	local function resumer(...)
		local ok, err = coroutine.resume(co, ...)
		if not ok then
			onerror(co, err)
		end
	end
	coros[co] = resumer
	return resumer
end
local function resumer()
	local co = coroutine.running()
	return coros[co]
end

function sleep(ms)
	setTimeout(ms, resumer())
	return coroutine.yield()
end

local t = new_thread(function(...)
	print("A", ...)
	sleep(1000)
	print("B")
	error("oops!")
end, function(co, err)
	print("an error occured!", debug.traceback(co, err))
end)("myargs")