The app crashed when I entered nothing as passphrase to activate the fail safe option

[sagorahmed]

Expected behavior

I expected that the app would notify me or stop me to do so when I entered nothing as the passphrase to activate the fail-safe option.

Actual behavior

After activating "Encrypt data" by giving the passphrase, when I entered nothing as the passphrase to activate the "fail-safe" option, then the app crashed.

How to reproduce

Here is every possible detail to reproduce the bug.

1. Open the app.
2. Go to the settings.
3. Tap on the "Encrypt data" to enable it and click "ACCEPT" by giving a passphrase twice.
4. Now tap on the "Fail safe" and accept the warning.
5. Click on the "ACCEPT" and give nothing in the field twice and notice the bug.

• App version: 2.5.1
• Operating system: Android 6.0.1

Recording Of The Bug

https://www.youtube.com/watch?v=k_kHczL1KzE

LogCat

07-01 23:08:28.537 31430 31430 E AndroidRuntime: FATAL EXCEPTION: main

07-01 23:08:28.537 31430 31430 E AndroidRuntime: Process: me.anon.grow, PID: 31430

07-01 23:08:28.537 31430 31430 E AndroidRuntime: java.lang.NullPointerException: Attempt to invoke virtual method 'boolean java.lang.String.equals(java.lang.Object)' on a null object reference

07-01 23:08:28.537 31430 31430 E AndroidRuntime: 	at me.anon.grow.fragment.SettingsFragment$7$2.onDialogConfirmed(SettingsFragment.java:406)

07-01 23:08:28.537 31430 31430 E AndroidRuntime: 	at me.anon.grow.fragment.PinDialogFragment$1.onClick(PinDialogFragment.java:74)

07-01 23:08:28.537 31430 31430 E AndroidRuntime: 	at com.android.internal.app.AlertController$ButtonHandler.handleMessage(AlertController.java:174)

07-01 23:08:28.537 31430 31430 E AndroidRuntime: 	at android.os.Handler.dispatchMessage(Handler.java:102)

07-01 23:08:28.537 31430 31430 E AndroidRuntime: 	at android.os.Looper.loop(Looper.java:148)

07-01 23:08:28.537 31430 31430 E AndroidRuntime: 	at android.app.ActivityThread.main(ActivityThread.java:7325)

07-01 23:08:28.537 31430 31430 E AndroidRuntime: 	at java.lang.reflect.Method.invoke(Native Method)

07-01 23:08:28.537 31430 31430 E AndroidRuntime: 	at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1230)

07-01 23:08:28.537 31430 31430 E AndroidRuntime: 	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1120)