Library used (support-v4, appcompat-v7, ...): appcompat-v7
Version used: 27.1.0
Theme used: Theme.AppCompat.Light.NoActionBar
Devices/Android versions reproduced on: Nexus 6, API 27

StaggeredGridLayoutManager.LazySpanLookup.invalidateAfter(position) doesn't check condition (position == RecyclerView.NO_POSITION) thus causing the call to Array.fill(...) to throw an ArrayIndexOutOfBoundsException since the array start position (which is position = NO_POSITION = -1) is less than 0. Unfortunately, I haven't managed to reproduce the issue reliably to get into this state to begin with.

Stacktrace:
java.lang.ArrayIndexOutOfBoundsException: Array index out of range: -1
at java.util.Arrays.rangeCheck(Arrays.java:120)
at java.util.Arrays.fill(Arrays.java:2831)
at android.support.v7.widget.StaggeredGridLayoutManager$LazySpanLookup.invalidateAfter(StaggeredGridLayoutManager.java:2876)
at android.support.v7.widget.StaggeredGridLayoutManager.handleUpdate(StaggeredGridLayoutManager.java:1552)
at android.support.v7.widget.StaggeredGridLayoutManager.onItemsUpdated(StaggeredGridLayoutManager.java:1528)
at android.support.v7.widget.RecyclerView$6.dispatchUpdate(RecyclerView.java:943)
at android.support.v7.widget.RecyclerView$6.onDispatchFirstPass(RecyclerView.java:931)
at android.support.v7.widget.AdapterHelper.dispatchFirstPassAndUpdateViewHolders(AdapterHelper.java:314)
at android.support.v7.widget.AdapterHelper.dispatchAndUpdateViewHolders(AdapterHelper.java:300)
at android.support.v7.widget.AdapterHelper.applyUpdate(AdapterHelper.java:220)
at android.support.v7.widget.AdapterHelper.preProcess(AdapterHelper.java:104)
at android.support.v7.widget.RecyclerView.processAdapterUpdatesAndSetAnimationFlags(RecyclerView.java:3471)
at android.support.v7.widget.RecyclerView.dispatchLayoutStep1(RecyclerView.java:3717)
at android.support.v7.widget.RecyclerView.dispatchLayout(RecyclerView.java:3527)
at android.support.v7.widget.RecyclerView.consumePendingUpdateOperations(RecyclerView.java:1767)
at android.support.v7.widget.RecyclerView$ViewFlinger.run(RecyclerView.java:4928)
at android.view.Choreographer$CallbackRecord.run(Choreographer.java:911)
at android.view.Choreographer.doCallbacks(Choreographer.java:723)
at android.view.Choreographer.doFrame(Choreographer.java:655)
at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:897)
at android.os.Handler.handleCallback(Handler.java:790)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:164)
at android.app.ActivityThread.main(ActivityThread.java:6494)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:440)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:807)