title: android.support.v4.app.FragmentManagerImpl.execPendingActions .How to fix it
body: <pre><code>java.lang.NullPointerException: 
    at android.support.v4.app.BackStackRecord.run (BackStackRecord.java:770)
    at android.support.v4.app.FragmentManagerImpl.execPendingActions (FragmentManager.java:1682)
    at android.support.v4.app.FragmentManagerImpl$1.run (FragmentManager.java:541)
    at android.os.Handler.handleCallback (Handler.java:739)
    at android.os.Handler.dispatchMessage (Handler.java:95)
    at android.os.Looper.loop (Looper.java:145)
    at android.app.ActivityThread.main (ActivityThread.java:6946)
    at java.lang.reflect.Method.invoke (Native Method)
    at java.lang.reflect.Method.invoke (Method.java:372)
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run (ZygoteInit.java:1404)
    at com.android.internal.os.ZygoteInit.main (ZygoteInit.java:1199)
  </code></pre>
  
  <p>Google console giving me crash report for <code>Fragment manager java.lang.NullPointerException: at android.support.v4.app.BackStackRecord.run()</code>. But I can't figure it out why its happening. Because it may be device specific issue.</p>