title: Can not perform this action after onSaveInstanceState on super.onBackPressed()
body: <p>I am displaying an interstitial ad when the user presses back to exit the application:</p>
  
  <pre><code>mInterstitialAd.setAdListener(new AdListener() {
     @Override
     public void onAdClosed() {
          onBackPressed(); //line 98
     }
  });
  
  requestNewInterstitial();
  
  private void requestNewInterstitial() {
     AdRequest adRequest = new AdRequest.Builder().build();
     mInterstitialAd.loadAd(adRequest);
  }
  
  @Override
  public void onBackPressed() {
     if (mInterstitialAd.isLoaded()) {
        mInterstitialAd.show();
     } else {
        super.onBackPressed(); //line 410
     }
  }
  </code></pre>
  
  <p>This is the crash report I received from my users:</p>
  
  <pre><code>java.lang.RuntimeException: Unable to pause activity {com.myapp/com.google.android.gms.ads.AdActivity}: java.lang.IllegalStateException: Can not perform this action after onSaveInstanceState
  at android.app.ActivityThread.performPauseActivity(ActivityThread.java:3088)
  at android.app.ActivityThread.performPauseActivity(ActivityThread.java:3043)
  at android.app.ActivityThread.handlePauseActivity(ActivityThread.java:3021)
  at android.app.ActivityThread.access$1000(ActivityThread.java:138)
  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1253)
  at android.os.Handler.dispatchMessage(Handler.java:102)
  at android.os.Looper.loop(Looper.java:149)
  at android.app.ActivityThread.main(ActivityThread.java:5045)
  at java.lang.reflect.Method.invokeNative(Native Method)
  at java.lang.reflect.Method.invoke(Method.java:515)
  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:794)
  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:610)
  at dalvik.system.NativeStart.main(Native Method)
  Caused by: java.lang.IllegalStateException: Can not perform this action after onSaveInstanceState
  at android.app.FragmentManagerImpl.checkStateLoss(FragmentManager.java:1323)
  at android.app.FragmentManagerImpl.popBackStackImmediate(FragmentManager.java:493)
  at android.app.Activity.onBackPressed(Activity.java:2215)
  at com.myapp.MainActivity.onBackPressed(MainActivity.java:410)
  at com.myapp.MainActivity$1.onAdClosed(MainActivity.java:98)
  at com.google.android.gms.ads.internal.client.zzc.onAdClosed(Unknown Source)
  at com.google.android.gms.ads.internal.client.zzm$zza.onTransact(Unknown Source)
  at android.os.Binder.transact(Binder.java:361)
  at com.google.android.gms.ads.internal.client.l.a(SourceFile:109)
  at com.google.android.gms.ads.internal.a.n(SourceFile:645)
  at com.google.android.gms.ads.internal.b.t(SourceFile:351)
  at com.google.android.gms.ads.internal.t.t(SourceFile:141)
  at com.google.android.gms.ads.internal.overlay.ab.n(SourceFile:672)
  at com.google.android.gms.ads.internal.overlay.ab.i(SourceFile:408)
  at com.google.android.gms.ads.internal.overlay.a.d.onTransact(SourceFile:86)
  at android.os.Binder.transact(Binder.java:361)
  at com.google.android.gms.internal.zzdj$zza$zza.onPause(Unknown Source)
  at com.google.android.gms.ads.AdActivity.onPause(Unknown Source)
  at android.app.Activity.performPause(Activity.java:5335)
  at android.app.Instrumentation.callActivityOnPause(Instrumentation.java:1233)
  at android.app.ActivityThread.performPauseActivity(ActivityThread.java:3074)
  </code></pre>
  
  <p>I understand that it is triggered when the user closes the ad, but why does it die on <code>super.onBackPressed()</code>?</p>