[help] more detailed example about `jass.log`

[Tramis]

能在文档里加上 jass.log 的路径和级别配置实例吗，我按下面的配置了但是测试时魔兽中道崩殂，似乎读了 0 指针，现在不太确定是不是我的配置出了什么问题
could you add more detailed example about jass.log in the document? I configured it as below but the war3 crashed while I testing it, and it said that it read 0x00000000, I'm not quite sure whether there is a problem

local log = require 'jass.log'

log.path = "C:/Users/xxx/maps/log/"
log.level = 1

log.debug(('玩家[%s][%s]')
        :format(i, Game.players:last()
            :map(function(p) return p:get_name() end)
            :unwrap_or("非玩家")))

把两行配置去掉就不会崩溃了。我顺便想问一下不配置的情况下默认值是多少？
it won't crash if I remove the 2 lines, I also want to know what's the default value of them