Wrong index ‘-2’ in clicking left arrow when carousel contains only 1 image

[Chiaki-meow]

TuSimple/naive-ui version (版本)

2.34.3

Vue version (Vue 版本)

3.3.4

Browser and its version (浏览器及其版本)

Chrome(89.0.4389.128)

System and its version (系统及其版本)

MacOS(11.2.3)

Node version (Node 版本)

Reappearance link (重现链接)

https://codesandbox.io/embed/friendly-surf-7qlgzq?fontsize=14&hidenavigation=1&theme=dark

Reappearance steps (重现步骤)

Click left arrow, and console will show that currentIndex has been changed to -2, and it cannot be changed or reseted.
点击向左切换图片，在控制台里可以看到currentIndex变成了-2，并且此时点击向左向右切换按钮都不能更改currentIndex

Expected results (期望的结果)

click left arrow, currentIndex cannot change(maybe it was -1 when there is only one image?)

Actual results (实际的结果)

click left arrow, currentIndex changed to -2, and cannot be changed.

Remarks (补充说明)

Maybe it is a good way to avoid this bug by:
When the number of images is one, hide the arrow by:
:show-arrow="images.length > 1"
:)
And the right arrow doesn't has this bug! Only the left one.

我现在解决这个bug的方式是在carousel中引入 :show-arrow="images.length > 1" 去动态判断图片的数量来控制按钮的显隐，因为我觉得如果不点这个左侧切换按键就应该不会有这个bug。但是可能对于这种静态元素不太好用！
在一张图的时候点击右侧切换是不会有问题的，index也不会改变。