[Nexus 5 Original Android Development] Grondinm:
Just switched to ART so far the only thing not working is faceunlock. Running SlimKat 1.6 with latest slimgapps.

Edit:

Just for info here is the error of the crash

11-30 09:15:04.410 I/ActivityManager(864): START u0 {cmp=com.android.facelock/.AddToSetup} from pid 2276
11-30 09:15:04.550 W/art (224): Could not get current activity
11-30 09:15:04.570 I/ActivityManager(864): Start proc com.android.facelock for activity com.android.facelock/.AddToSetup: pid=10111 uid=10059 gids={50059}
11-30 09:15:04.660 I/art (10111): Failed to open oat file from /system/app/FaceLock.odex or /data/dalvik-cache/system@app@FaceLock.apk@classes.dex.
11-30 09:15:04.660 E/art (10111): Failed to open file: /data/dalvik-cache/system@app@FaceLock.apk@classes.dex
11-30 09:15:04.660 E/art (10111): Failed to open locked oat file: /data/dalvik-cache/system@app@FaceLock.apk@classes.dex
11-30 09:15:04.660 W/art (10111): Failed to open dex file: /system/app/FaceLock.apk
11-30 09:15:04.670 D/AndroidRuntime(10111): Shutting down VM
11-30 09:15:04.680 E/AndroidRuntime(10111): FATAL EXCEPTION: main
11-30 09:15:04.680 E/AndroidRuntime(10111): Process: com.android.facelock, PID: 10111
11-30 09:15:04.680 E/AndroidRuntime(10111): java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.android.facelock/com.android.facelock.AddToSetup}: java.lang.ClassNotFoundException: Didn't find class "com.android.facelock.AddToSetup" on path: DexPathList[[zip file "/system/app/FaceLock.apk"],nativeLibraryDirectories=[/vendor/lib, /system/lib]]
11-30 09:15:04.680 E/AndroidRuntime(10111): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2105)
11-30 09:15:04.680 E/AndroidRuntime(10111): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2229)
11-30 09:15:04.680 E/AndroidRuntime(10111): at android.app.ActivityThread.access$700(ActivityThread.java:138)
11-30 09:15:04.680 E/AndroidRuntime(10111): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1400)
11-30 09:15:04.680 E/AndroidRuntime(10111): at android.os.Handler.dispatchMessage(Handler.java:102)
11-30 09:15:04.680 E/AndroidRuntime(10111): at android.os.Looper.loop(Looper.java:137)
11-30 09:15:04.680 E/AndroidRuntime(10111): at android.app.ActivityThread.main(ActivityThread.java:5031)
11-30 09:15:04.680 E/AndroidRuntime(10111): at java.lang.reflect.Method.invoke(Native Method)
11-30 09:15:04.680 E/AndroidRuntime(10111): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:777)
11-30 09:15:04.680 E/AndroidRuntime(10111): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:593)
11-30 09:15:04.680 E/AndroidRuntime(10111): Caused by: java.lang.ClassNotFoundException: Didn't find class "com.android.facelock.AddToSetup" on path: DexPathList[[zip file "/system/app/FaceLock.apk"],nativeLibraryDirectories=[/vendor/lib, /system/lib]]
11-30 09:15:04.680 E/AndroidRuntime(10111): at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:56)
11-30 09:15:04.680 E/AndroidRuntime(10111): at java.lang.ClassLoader.loadClass(ClassLoader.java:511)
11-30 09:15:04.680 E/AndroidRuntime(10111): at java.lang.ClassLoader.loadClass(ClassLoader.java:469)
11-30 09:15:04.680 E/AndroidRuntime(10111): at android.app.Instrumentation.newActivity(Instrumentation.java:1061)
11-30 09:15:04.680 E/AndroidRuntime(10111): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2096)
11-30 09:15:04.680 E/AndroidRuntime(10111): ... 9 more
11-30 09:15:04.680 E/AndroidRuntime(10111): Suppressed: java.io.IOException: Unable to open dex file: /system/app/FaceLock.apk
11-30 09:15:04.680 E/AndroidRuntime(10111): at dalvik.system.DexFile.openDexFileNative(Native Method)
11-30 09:15:04.680 E/AndroidRuntime(10111): at dalvik.system.DexFile.openDexFile(DexFile.java:296)
11-30 09:15:04.680 E/AndroidRuntime(10111): at dalvik.system.DexFile.<init>(DexFile.java:80)
11-30 09:15:04.680 E/AndroidRuntime(10111): at dalvik.system.DexFile.<init>(DexFile.java:59)
11-30 09:15:04.680 E/AndroidRuntime(10111): at dalvik.system.DexPathList.loadDexFile(DexPathList.java:263)
11-30 09:15:04.680 E/AndroidRuntime(10111): at dalvik.system.DexPathList.makeDexElements(DexPathList.java:230)
11-30 09:15:04.680 E/AndroidRuntime(10111): at dalvik.system.DexPathList.<init>(DexPathList.java:112)
11-30 09:15:04.680 E/AndroidRuntime(10111): at dalvik.system.BaseDexClassLoader.<init>(BaseDexClassLoader.java:48)
11-30 09:15:04.680 E/AndroidRuntime(10111): at dalvik.system.PathClassLoader.<init>(PathClassLoader.java:65)
11-30 09:15:04.680 E/AndroidRuntime(10111): at android.app.ApplicationLoaders.getClassLoader(ApplicationLoaders.java:57)
11-30 09:15:04.680 E/AndroidRuntime(10111): at android.app.LoadedApk.getClassLoader(LoadedApk.java:326)
11-30 09:15:04.680 E/AndroidRuntime(10111): at android.app.LoadedApk.makeApplication(LoadedApk.java:508)
11-30 09:15:04.680 E/AndroidRuntime(10111): at android.app.ActivityThread.handleBindApplication(ActivityThread.java:4331)
11-30 09:15:04.680 E/AndroidRuntime(10111): at android.app.ActivityThread.access$1400(ActivityThread.java:138)
11-30 09:15:04.680 E/AndroidRuntime(10111): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1460)
11-30 09:15:04.680 E/AndroidRuntime(10111): ... 6 more
11-30 09:15:04.680 E/AndroidRuntime(10111): Suppressed: java.lang.ClassNotFoundException: com.android.facelock.AddToSetup
11-30 09:15:04.680 E/AndroidRuntime(10111): at java.lang.Class.classForName(Native Method)
11-30 09:15:04.680 E/AndroidRuntime(10111): at java.lang.BootClassLoader.findClass(ClassLoader.java:781)
11-30 09:15:04.680 E/AndroidRuntime(10111): at java.lang.BootClassLoader.loadClass(ClassLoader.java:841)
11-30 09:15:04.680 E/AndroidRuntime(10111): at java.lang.ClassLoader.loadClass(ClassLoader.java:504)
11-30 09:15:04.680 E/AndroidRuntime(10111): ... 12 more
11-30 09:15:04.680 E/AndroidRuntime(10111): Caused by: java.lang.NoClassDefFoundError: Class "Lcom/android/facelock/AddToSetup;" not found
11-30 09:15:04.680 E/AndroidRuntime(10111): ... 16 more
11-30 09:15:04.680 W/ActivityManager(864): Force finishing activity com.android.facelock/.AddToSetup
11-30 09:15:04.720 I/art (2276): Heap trim of managed (duration=14.559479ms, advised=812KB) and native (duration=15.413959ms, advised=312KB) heaps. Managed heap utilization of 39%.
11-30 09:15:05.210 W/ActivityManager(864): Activity pause timeout for ActivityRecord{6594d070 u0 com.android.facelock/.AddToSetup t21 f}