Action queue may reorder actions

[numberZero]

According to this code, all expired actions are sorted by priority, then by original order. So if actions with different time happen to expire in the same globalstep, the time difference is ignored and addition order takes precedence.

mesecons/mesecons/actionqueue.lua

Lines 81 to 107 in 583d2c1

	for _, ac in ipairs(actions) do
	if ac.time > 0 then
	-- action ac is to be executed later
	-- ~> insert into queue.actions
	ac.time = ac.time - dtime
	table.insert(queue.actions, ac)
	else
	-- action ac is to be executed now
	-- ~> insert into actions_now
	table.insert(actions_now, ac)
	end
	end
	-- stable-sort the executed actions after their priority
	-- some constructions might depend on the execution order, hence we first
	-- execute the actions that had a lower index in actions_now
	local old_action_order = {}
	for i, ac in ipairs(actions_now) do
	old_action_order[ac] = i
	end
	table.sort(actions_now, function(ac1, ac2)
	if ac1.priority ~= ac2.priority then
	return ac1.priority > ac2.priority
	else
	return old_action_order[ac1] < old_action_order[ac2]
	end
	end)

This affects LuaC interrupts, delayers, whatever devices use non-zero time in queue:add_action.