打开部分ppt文件，出现NPE错误
这个的load的NPE堆栈 和前4个都不一样，不确定是否同一个问题
文件放这里了 https://netcut.cn/1go2tr3oe
错误如下：
- Code: Select all
java.lang.NullPointerException
at com.spire.presentation.packages.sprcvk.spr‡┈(Unknown Source)
at com.spire.presentation.packages.spriqk.spr█┈(Unknown Source)
at com.spire.presentation.packages.sprotk.spr┧┇(Unknown Source)
at com.spire.presentation.ActiveSlide.spr▢┸(Unknown Source)
at com.spire.presentation.packages.sprdlp.spr¶┸(Unknown Source)
at com.spire.presentation.packages.sprdlp.<init>(Unknown Source)
at com.spire.presentation.packages.sprskp.spr┮┹(Unknown Source)
at com.spire.presentation.packages.sprskp.spr┅┭(Unknown Source)
at com.spire.presentation.packages.sprskp.spr〠┹(Unknown Source)
at com.spire.presentation.packages.sprskp.<init>(Unknown Source)
at com.spire.presentation.packages.sprskp.<init>(Unknown Source)
at com.spire.presentation.Presentation.spr┲┹(Unknown Source)
at com.spire.presentation.Presentation.loadFromStream(Unknown Source)
at com.yuanfudao.metis.live.ppt.service.PPTServiceImpl.processThumbnails(PPTServiceImpl.java:216)
at Main.processThumbnails(Main.java:44)
at Main.lambda$main$1(Main.java:86)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:750)
