[Nexus 5 Android Development] redox57:
After a reboot, I get FC on IU System :

D/PhoneStatusBar( 3987): heads up is enabled
I/PowerUI.Notification( 3987): dismissing low battery warning: level=68
I/PowerUI.Notification( 3987): dismissing low battery notification
D/PowerUI.Notification( 3987): updateNotification mWarning=false mSaver=false mInvalidCharger=false
I/notification_cancel( 830): [10020,3987,com.android.systemui,100,low_battery,0,0,64,8,NULL]
I/notification_panel_revealed( 830): []
D/PhoneStatusBar( 3987): disable: < EXPAND ICONS* alerts SYSTEM_INFO* BACK HOME RECENT clock SEARCH >
I/HotwordWorker( 1421): onReady
I/backup_data_changed( 830): android
I/backup_data_changed( 830): android
I/backup_data_changed( 830): android
I/backup_data_changed( 830): android
I/backup_data_changed( 830): android
I/backup_data_changed( 830): android
D/AndroidRuntime( 3987): Shutting down VM
E/AndroidRuntime( 3987): FATAL EXCEPTION: main
E/AndroidRuntime( 3987): Process: com.android.systemui, PID: 3987
E/AndroidRuntime( 3987): java.util.IllegalFormatConversionException: %d can't format java.lang.String arguments
E/AndroidRuntime( 3987): at java.util.Formatter.badArgumentType(Formatter.java:1489)
E/AndroidRuntime( 3987): at java.util.Formatter.transformFromInteger(Formatter.java:1689)
E/AndroidRuntime( 3987): at java.util.Formatter.transform(Formatter.java:1461)
E/AndroidRuntime( 3987): at java.util.Formatter.doFormat(Formatter.java:1081)
E/AndroidRuntime( 3987): at java.util.Formatter.format(Formatter.java:1042)
E/AndroidRuntime( 3987): at java.util.Formatter.format(Formatter.java:1011)
E/AndroidRuntime( 3987): at java.lang.String.format(String.java:1959)
E/AndroidRuntime( 3987): at android.content.res.Resources.getString(Resources.java:383)
E/AndroidRuntime( 3987): at com.android.systemui.statusbar.KeyguardIndicationController.computePowerIndication(KeyguardIndi
cationController.java:151)
E/AndroidRuntime( 3987): at com.android.systemui.statusbar.KeyguardIndicationController.computeIndication(KeyguardIndicatio
nController.java:135)
E/AndroidRuntime( 3987): at com.android.systemui.statusbar.KeyguardIndicationController.updateIndication(KeyguardIndication
Controller.java:126)
E/AndroidRuntime( 3987): at com.android.systemui.statusbar.KeyguardIndicationController.access$200(KeyguardIndicationContro
ller.java:44)
E/AndroidRuntime( 3987): at com.android.systemui.statusbar.KeyguardIndicationController$1.onRefreshBatteryInfo(KeyguardIndi
cationController.java:168)
E/AndroidRuntime( 3987): at com.android.keyguard.KeyguardUpdateMonitor.handleBatteryUpdate(KeyguardUpdateMonitor.java:802)
E/AndroidRuntime( 3987): at com.android.keyguard.KeyguardUpdateMonitor.access$100(KeyguardUpdateMonitor.java:71)
E/AndroidRuntime( 3987): at com.android.keyguard.KeyguardUpdateMonitor$1.handleMessage(KeyguardUpdateMonitor.java:146)
E/AndroidRuntime( 3987): at android.os.Handler.dispatchMessage(Handler.java:102)
E/AndroidRuntime( 3987): at android.os.Looper.loop(Looper.java:135)
E/AndroidRuntime( 3987): at android.app.ActivityThread.main(ActivityThread.java:5070)
E/AndroidRuntime( 3987): at java.lang.reflect.Method.invoke(Native Method)
E/AndroidRuntime( 3987): at java.lang.reflect.Method.invoke(Method.java:372)
E/AndroidRuntime( 3987): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:836)
E/AndroidRuntime( 3987): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:631)
I/am_crash( 830): [3987,0,com.android.systemui,1086864909,java.util.IllegalFormatConversionException,%d can't format java.lang.St
ring arguments,Formatter.java,1489]
W/ActivityManager( 830): Process com.android.systemui has crashed too many times: killing!
I/am_process_crashed_too_much( 830): [0,com.android.systemui,10020]

Even after rebooting, it keeps on crashing... :/

Anyone have an idea or will I have to wipe com.android.systemui (or all) data ?

Edit : I think I have found what caused this bug, it happens when the phone is USB plugged (with ADB enabled) on boot, before asking the PIN code !