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java.lang.IllegalArgumentException: provider==null	at android.location.LocationManager.getLastKnownLocation(LocationManager.java:953)	at edu.nyu.cs.omnidroid.app.controller.HandlerService.insertLocationData(HandlerService.java:247)	at edu.nyu.cs.omnidroid.app.controller.HandlerService.addGlobalAttributesToIntent(HandlerService.java:220)	at edu.nyu.cs.omnidroid.app.controller.HandlerService.onStart(HandlerService.java:129)	at android.app.Service.onStartCommand(Service.java:420)	at android.app.ActivityThread.handleServiceArgs(ActivityThread.java:3053)	at android.app.ActivityThread.access$3600(ActivityThread.java:125)	at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2096)	at android.os.Handler.dispatchMessage(Handler.java:99)	at android.os.Looper.loop(Looper.java:123)	at android.app.ActivityThread.main(ActivityThread.java:4627)	at java.lang.reflect.Method.invokeNative(Native Method)	at java.lang.reflect.Method.invoke(Method.java:521)	at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)	at dalvik.system.NativeStart.main(Native Method)