title: ClassNotFoundException when unmarshalling: android.support.v4.view.ViewPager$SavedState
body: <p>I am seeing the following error in my Android crash reports:</p>
  
  <pre><code>android.os.BadParcelableException: ClassNotFoundException when unmarshalling: android.support.v4.view.ViewPager$SavedState
  at android.os.Parcel.readParcelable(Parcel.java:1971)
  at android.os.Parcel.readValue(Parcel.java:1859)
  at android.os.Parcel.readSparseArrayInternal(Parcel.java:2128)
  at android.os.Parcel.readSparseArray(Parcel.java:1581)
  at android.os.Parcel.readValue(Parcel.java:1916)
  at android.os.Parcel.readMapInternal(Parcel.java:2099)
  at android.os.Bundle.unparcel(Bundle.java:223)
  at android.os.Bundle.getSparseParcelableArray(Bundle.java:1225)
  at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:806)
  at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1083)
  at android.support.v4.app.BackStackRecord.run(BackStackRecord.java:635)
  at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1431)
  at android.support.v4.app.FragmentManagerImpl.executePendingTransactions(FragmentManager.java:431)
  at android.support.v4.app.FragmentStatePagerAdapter.finishUpdate(FragmentStatePagerAdapter.java:160)
  at android.support.v4.view.ViewPager.populate(ViewPager.java:895)
  at android.support.v4.view.ViewPager.populate(ViewPager.java:772)
  at android.support.v4.view.ViewPager.completeScroll(ViewPager.java:1539)
  at android.support.v4.view.ViewPager.computeScroll(ViewPager.java:1422)
  at android.view.ViewGroup.drawChild(ViewGroup.java:3028)
  at android.view.ViewGroup.dispatchDraw(ViewGroup.java:2788)
  at android.view.ViewGroup.drawChild(ViewGroup.java:3184)
  at android.view.ViewGroup.dispatchDraw(ViewGroup.java:2788)
  at android.view.ViewGroup.drawChild(ViewGroup.java:3184)
  at android.view.ViewGroup.dispatchDraw(ViewGroup.java:2788)
  at android.view.ViewGroup.drawChild(ViewGroup.java:3184)
  at android.view.ViewGroup.dispatchDraw(ViewGroup.java:2788)
  at android.view.View.draw(View.java:11017)
  at android.widget.FrameLayout.draw(FrameLayout.java:450)
  at com.android.internal.policy.impl.PhoneWindow$DecorView.draw(PhoneWindow.java:2175)
  at android.view.ViewRootImpl.draw(ViewRootImpl.java:2234)
  at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1810)
  at android.view.ViewRootImpl.handleMessage(ViewRootImpl.java:2695)
  at android.os.Handler.dispatchMessage(Handler.java:99)
  at android.os.Looper.loop(Looper.java:154)
  at android.app.ActivityThread.main(ActivityThread.java:4977)
  at java.lang.reflect.Method.invokeNative(Native Method)
  at java.lang.reflect.Method.invoke(Method.java:511)
  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
  at dalvik.system.NativeStart.main(Native Method)
  </code></pre>
  
  <p>It appears to happen intermittently when resuming an activity. I do not directly access the SavedState class in any code.</p>