I just bought a new LG Nexus 5X. Stock 6.0.1, not rooted. For some reason, Google Contacts has been force-closing. Clearing its cache & data did not resolve it. I can't reproduce the issue in Safe Mode, so apparently it's caused by a 3rd party app. The only apps that have the ability to update contact information are Google Plus & Facebook Messenger. I tried uninstalling both, but the problem still occurred.
I also have Google Contacts installed on my LG G3 with all the same apps and it works fine. When I set up my 5X, I imported apps & data from my G3. I tried a factory reset yesterday and restored apps & data from my most recent Google backup of the device with no joy.
EDIT: I forgot to mention I'm able to access and edit my contacts via the contacts tab in Google Phone just fine.
I took a bug report, here's the crash info. No idea what it means. I hope someone has an idea.
------ SYSTEM LOG (logcat -v threadtime -d *:v) ------
--------- beginning of crash
07-11 17:18:54.398 24506 24506 E AndroidRuntime: FATAL EXCEPTION: main
07-11 17:18:54.398 24506 24506 E AndroidRuntime: Process: com.google.android.contacts, PID: 24506
07-11 17:18:54.398 24506 24506 E AndroidRuntime: java.lang.RuntimeException: Unable to start activity ComponentInfo{com.google.android.contacts/com.android.contacts.activities.PeopleActivity}: android.content.ActivityNotFoundException: No Activity found to handle Intent { act=android.provider.action.QUICK_CONTACT flg=0x4000000 pkg=com.google.android.contacts (has extras) }
07-11 17:18:54.398 24506 24506 E AndroidRuntime: at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2416)
07-11 17:18:54.398 24506 24506 E AndroidRuntime: at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2476)
07-11 17:18:54.398 24506 24506 E AndroidRuntime: at android.app.ActivityThread.-wrap11(ActivityThread.java)
07-11 17:18:54.398 24506 24506 E AndroidRuntime: at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1344)
07-11 17:18:54.398 24506 24506 E AndroidRuntime: at android.os.Handler.dispatchMessage(Handler.java:102)
07-11 17:18:54.398 24506 24506 E AndroidRuntime: at android.os.Looper.loop(Looper.java:148)
07-11 17:18:54.398 24506 24506 E AndroidRuntime: at android.app.ActivityThread.main(ActivityThread.java:5422)
07-11 17:18:54.398 24506 24506 E AndroidRuntime: at java.lang.reflect.Method.invoke(Native Method)
07-11 17:18:54.398 24506 24506 E AndroidRuntime: at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
07-11 17:18:54.398 24506 24506 E AndroidRuntime: at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
07-11 17:18:54.398 24506 24506 E AndroidRuntime: Caused by: android.content.ActivityNotFoundException: No Activity found to handle Intent { act=android.provider.action.QUICK_CONTACT flg=0x4000000 pkg=com.google.android.contacts (has extras) }
07-11 17:18:54.398 24506 24506 E AndroidRuntime: at android.app.Instrumentation.checkStartActivityResult(Instrumentation.java:1798)
07-11 17:18:54.398 24506 24506 E AndroidRuntime: at android.app.Instrumentation.execStartActivity(Instrumentation.java:1512)
07-11 17:18:54.398 24506 24506 E AndroidRuntime: at android.app.Activity.startActivityForResult(Activity.java:3930)
07-11 17:18:54.398 24506 24506 E AndroidRuntime: at android.app.Activity.startActivityForResult(Activity.java:3890)
07-11 17:18:54.398 24506 24506 E AndroidRuntime: at android.app.Activity.startActivity(Activity.java:4213)
07-11 17:18:54.398 24506 24506 E AndroidRuntime: at android.app.Activity.startActivity(Activity.java:4181)
07-11 17:18:54.398 24506 24506 E AndroidRuntime: at com.android.contacts.common.util.ImplicitIntentsUtil.startActivityInApp(ImplicitIntentsUtil.java:75)
07-11 17:18:54.398 24506 24506 E AndroidRuntime: at com.android.contacts.activities.PeopleActivity.processIntent(PeopleActivity.java:294)
07-11 17:18:54.398 24506 24506 E AndroidRuntime: at com.android.contacts.activities.PeopleActivity.onCreate(PeopleActivity.java:233)
07-11 17:18:54.398 24506 24506 E AndroidRuntime: at android.app.Activity.performCreate(Activity.java:6251)
07-11 17:18:54.398 24506 24506 E AndroidRuntime: at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1107)
07-11 17:18:54.398 24506 24506 E AndroidRuntime: at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2369)
07-11 17:18:54.398 24506 24506 E AndroidRuntime: ... 9 more
07-11 17:24:34.384 28315 28653 E AndroidRuntime: FATAL EXCEPTION: Thread-3829
07-11 17:24:34.384 28315 28653 E AndroidRuntime: Process: com.paranoidgems.potential, PID: 28315
07-11 17:24:34.384 28315 28653 E AndroidRuntime: java.lang.NullPointerException: Attempt to invoke interface method 'java.util.Iterator java.util.List.iterator()' on a null object reference
07-11 17:24:34.384 28315 28653 E AndroidRuntime: at com.paranoidgems.potential.i.run(BatteryStatusBroadcastReceiver.java:541)
