[T-Mobile LG G3] CrusherJoe:
Okay, I can tell you why it's happening:

I/ActivityManager( 918): START u0 {act=android.intent.action.CALL_PRIVILEGED dat=tel:xxxxxxxxx-xxxx cmp=com.android.server.telecom/.PrivilegedCallActivity (has extras)} from uid 10005 on display 0

W/ActivityManager( 918): Permission Denial: starting Intent { act=android.intent.action.CALL_PRIVILEGED dat=tel:xxxxxxxxx-xxxx cmp=com.android.server.telecom/.PrivilegedCallActivity (has extras) } from ProcessRecord{1ef360ec 8105:com.android.dialer/u0a5} (pid=8105, uid=10005) requires android.permission.CALL_PRIVILEGED

D/AndroidRuntime( 8105): Shutting down VM

E/AndroidRuntime( 8105): FATAL EXCEPTION: main

E/AndroidRuntime( 8105): Process: com.android.dialer, PID: 8105

E/AndroidRuntime( 8105): java.lang.SecurityException: Permission Denial: starting Intent { act=android.intent.action.CALL_PRIVILEGED dat=tel:xxxxxxxxx-xxxx cmp=com.android.server.telecom/.PrivilegedCallActivity (has extras) } from ProcessRecord{1ef360ec 8105:com.android.dialer/u0a5} (pid=8105, uid=10005) requires android.permission.CALL_PRIVILEGED

E/AndroidRuntime( 8105):	at android.os.Parcel.readException(Parcel.java:1540)

E/AndroidRuntime( 8105):	at android.os.Parcel.readException(Parcel.java:1493)

E/AndroidRuntime( 8105):	at android.app.ActivityManagerProxy.startActivity(ActivityManagerNative.java:2404)

E/AndroidRuntime( 8105):	at android.app.Instrumentation.execStartActivity(Instrumentation.java:1480)

E/AndroidRuntime( 8105):	at android.app.Activity.startActivityForResult(Activity.java:3736)

E/AndroidRuntime( 8105):	at android.app.Activity.startActivityForResult(Activity.java:3697)

E/AndroidRuntime( 8105):	at android.app.Activity.startActivity(Activity.java:4007)

E/AndroidRuntime( 8105):	at android.app.Activity.startActivity(Activity.java:3975)

E/AndroidRuntime( 8105):	at com.android.dialer.util.DialerUtils.startActivityWithErrorToast(DialerUtils.java:85)

E/AndroidRuntime( 8105):	at com.android.dialer.util.DialerUtils.startActivityWithErrorToast(DialerUtils.java:60)

E/AndroidRuntime( 8105):	at com.android.dialer.dialpad.DialpadFragment.handleDialButtonPressed(DialpadFragment.java:1330)

E/AndroidRuntime( 8105):	at com.android.dialer.dialpad.DialpadFragment.onClick(DialpadFragment.java:1033)

E/AndroidRuntime( 8105):	at android.view.View.performClick(View.java:4756)

E/AndroidRuntime( 8105):	at android.view.View$PerformClick.run(View.java:19749)

E/AndroidRuntime( 8105):	at android.os.Handler.handleCallback(Handler.java:739)

E/AndroidRuntime( 8105):	at android.os.Handler.dispatchMessage(Handler.java:95)

E/AndroidRuntime( 8105):	at android.os.Looper.loop(Looper.java:135)

E/AndroidRuntime( 8105):	at android.app.ActivityThread.main(ActivityThread.java:5221)

E/AndroidRuntime( 8105):	at java.lang.reflect.Method.invoke(Native Method)

E/AndroidRuntime( 8105):	at java.lang.reflect.Method.invoke(Method.java:372)

E/AndroidRuntime( 8105):	at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:898)

E/AndroidRuntime( 8105):	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:693)

W/ActivityManager( 918): Force finishing activity com.android.dialer/.DialtactsActivity

...but I'll be damned if I know how to fix it.