NullPointerException: Unable to resume activity

[anlalalu]

Reproduction Steps

This crash is triggered by an automatic testing tool with this shell instruction:

adb shell am start -n org.passwordmaker.android/org.passwordmaker.android.PatternDataListActivity

Stack Trace

E/AndroidRuntime: FATAL EXCEPTION: main
Process: org.passwordmaker.android, PID: 19514
java.lang.RuntimeException: Unable to resume activity {org.passwordmaker.android/org.passwordmaker.android.PatternDataListActivity}: java.lang.NullPointerException: Can not find account by id: null
at android.app.ActivityThread.performResumeActivity(ActivityThread.java:2774)
at android.app.ActivityThread.handleResumeActivity(ActivityThread.java:2803)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2238)
at android.app.ActivityThread.access$800(ActivityThread.java:135)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1196)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:136)
at android.app.ActivityThread.main(ActivityThread.java:5001)
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:785)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:601)
at dalvik.system.NativeStart.main(Native Method)
Caused by: java.lang.NullPointerException: Can not find account by id: null
at com.google.common.base.Preconditions.checkNotNull(Preconditions.java:993)
at org.passwordmaker.android.PatternDataListFragment.setAccountId(PatternDataListFragment.java:54)
at org.passwordmaker.android.PatternDataListActivity.onResume(PatternDataListActivity.java:64)
at android.app.Instrumentation.callActivityOnResume(Instrumentation.java:1192)
at android.app.Activity.performResume(Activity.java:5310)
at android.app.ActivityThread.performResumeActivity(ActivityThread.java:2764)

Debug info

App Version = the latest master branch

Android Version = 4.4.4

Since it is triggered with shell instruction rather than user interface, I wonder will you consider it as a defect.