java.lang.NullPointerException: android.support.v7.widget.RecyclerView$ViewHolder.shouldIgnore()

[monakhv]

Hi!
I've the following stack trace some times whene calling notifyParentItemChanged(i)

java.lang.NullPointerException: Attempt to invoke virtual method 'boolean android.support.v7.widget.RecyclerView$ViewHolder.shouldIgnore()' on a null object reference at android.support.v7.widget.RecyclerView.dispatchLayoutStep3(RecyclerView.java:3051) at android.support.v7.widget.RecyclerView.dispatchLayout(RecyclerView.java:2914) at android.support.v7.widget.RecyclerView.consumePendingUpdateOperations(RecyclerView.java:1447) at android.support.v7.widget.RecyclerView.access$400(RecyclerView.java:147) at android.support.v7.widget.RecyclerView$1.run(RecyclerView.java:285) at android.view.Choreographer$CallbackRecord.run(Choreographer.java:767) at android.view.Choreographer.doCallbacks(Choreographer.java:580) at android.view.Choreographer.doFrame(Choreographer.java:549) at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:753) at android.os.Handler.handleCallback(Handler.java:739) at android.os.Handler.dispatchMessage(Handler.java:95) at android.os.Looper.loop(Looper.java:135) at android.app.ActivityThread.main(ActivityThread.java:5254) at java.lang.reflect.Method.invoke(Native Method) at java.lang.reflect.Method.invoke(Method.java:372) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698)

Could it be by any chance some bug of expandable-recycler-view?
The situation is reproduce for both 23.2.0 and 23.1.1 versions of support library using latest
2.1.1 version of expandable-recycler-view.

[paul-turner]

Hi @monakhv,
Yes it could be a bug for expandable-recycler-view, by any chance do you have more details on how to reproduce the bug or maybe a small sample (or editing the current sample projects). Thanks for the help!