问未加固并不会，加固后app启动奔溃？？

IconLoader: Could not find icon drawable from resource
    android.content.res.Resources$NotFoundException: Resource ID #0xffffffff
        at android.content.res.ResourcesImpl.getValueForDensity(ResourcesImpl.java:225)
        at android.content.res.Resources.getDrawableForDensity(Resources.java:887)
        at android.content.res.Resources.getDrawable(Resources.java:827)
        at com.android.systemui.shared.recents.model.IconLoader.createNewIconForTask(IconLoader.java:118)
        at com.android.systemui.shared.recents.model.IconLoader.getAndInvalidateIfModified(IconLoader.java:94)
        at com.android.systemui.shared.recents.model.RecentsTaskLoader.getAndUpdateActivityIcon(RecentsTaskLoader.java:325)
        at com.android.systemui.shared.recents.model.RecentsTaskLoadPlan.executePlan(RecentsTaskLoadPlan.java:202)
        at com.android.systemui.shared.recents.model.RecentsTaskLoader.loadTasks(RecentsTaskLoader.java:173)
        at net.oneplus.quickstep.RecentsModel.onTaskStackChangedBackground(RecentsModel.java:275)
        at com.android.systemui.shared.system.TaskStackChangeListeners.onTaskStackChanged(TaskStackChangeListeners.java:80)
        at android.app.ITaskStackListener$Stub.onTransact(ITaskStackListener.java:50)
        at android.os.Binder.execTransact(Binder.java:752)
        
        
        
         java.util.ConcurrentModificationException
        at java.util.ArrayList$Itr.next(ArrayList.java:860)
        at android.app.ActivityThread.installContentProviders(ActivityThread.java:6106)
        at android.app.ActivityThread.handleBindApplication(ActivityThread.java:6021)
        at android.app.ActivityThread.access$1300(ActivityThread.java:207)
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1748)
        at android.os.Handler.dispatchMessage(Handler.java:106)
        at android.os.Looper.loop(Looper.java:193)
        at android.app.ActivityThread.main(ActivityThread.java:6863)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:537)