android version:8.1.0
recyclerView- support.v7-28.0.0
Describe:
I try to update item count in RecyclerView (use StaggeredGridLayoutManager),which step is change the dataSet and invoke Adapter.notifyItemRangeInserted(int ,int) (notifyDataSetChanged will no crash but i can't use is because the staggere layout may be dislocated).This step can be invoked many times depends on http response(a http response will insert some items ,we invoke many times http request).Sometimes the application will crash but we have no idea why it is crash. The crash stack like this(full stack to see the file)

java.lang.ArrayIndexOutOfBoundsException: Array index out of range: 46
        at java.util.Arrays.rangeCheck(Arrays.java:123)
        at java.util.Arrays.fill(Arrays.java:2831)
        at android.support.v7.widget.StaggeredGridLayoutManager$LazySpanLookup.invalidateAfter(StaggeredGridLayoutManager.java:2878)
        at android.support.v7.widget.StaggeredGridLayoutManager.handleUpdate(StaggeredGridLayoutManager.java:1550)
        at android.support.v7.widget.StaggeredGridLayoutManager.onItemsAdded(StaggeredGridLayoutManager.java:1509)
        at android.support.v7.widget.RecyclerView$6.dispatchUpdate(RecyclerView.java:1010)
        at android.support.v7.widget.RecyclerView$6.onDispatchSecondPass(RecyclerView.java:1027)
        at android.support.v7.widget.AdapterHelper.consumeUpdatesInOnePass(AdapterHelper.java:563)
        at android.support.v7.widget.RecyclerView.processAdapterUpdatesAndSetAnimationFlags(RecyclerView.java:3585)
        at android.support.v7.widget.RecyclerView.dispatchLayoutStep1(RecyclerView.java:3829)
        at android.support.v7.widget.RecyclerView.dispatchLayout(RecyclerView.java:3639)
......
......

please tell me the solution to solve this problem and what is the LazySpanLookup,thanks very much.