apps-android-commons: Crash when back button pressed if NearbyList has not finished loading

USER_COMMENT=gallery button then back
ANDROID_VERSION=6.0.1
APP_VERSION_NAME=1.30


BRAND=google
PHONE_MODEL=Nexus 5
CUSTOM_DATA=
STACK_TRACE=java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.Object android.content.Context.getSystemService(java.lang.String)' on a null object reference
at android.view.LayoutInflater.from(LayoutInflater.java:229)
at android.widget.ArrayAdapter.<init>(ArrayAdapter.java:178)
at android.widget.ArrayAdapter.<init>(ArrayAdapter.java:163)
at fr.free.nrw.commons.nearby.NearbyListFragment$NearbyAdapter.<init>(NearbyListFragment.java:178)
at fr.free.nrw.commons.nearby.NearbyListFragment$NearbyAsyncTask.onPostExecute(NearbyListFragment.java:143)
at fr.free.nrw.commons.nearby.NearbyListFragment$NearbyAsyncTask.onPostExecute(NearbyListFragment.java:112)

at android.os.AsyncTask.finish(AsyncTask.java:651)
at android.os.AsyncTask.-wrap1(AsyncTask.java)
at android.os.AsyncTask$InternalHandler.handleMessage(AsyncTask.java:668)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:148)
at android.app.ActivityThread.main(ActivityThread.java:5461)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)

USER_COMMENT=trying to post a picture of the weather in Nigeria
ANDROID_VERSION=5.1
APP_VERSION_NAME=1.31
BRAND=itel
PHONE_MODEL=itel it1506
CUSTOM_DATA=
STACK_TRACE=java.lang.RuntimeException: An error occured while executing doInBackground()
at android.os.AsyncTask$3.done(AsyncTask.java:304)
at java.util.concurrent.FutureTask.finishCompletion(FutureTask.java:355)
at java.util.concurrent.FutureTask.setException(FutureTask.java:222)
at java.util.concurrent.FutureTask.run(FutureTask.java:242)
at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:231)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
at java.lang.Thread.run(Thread.java:818)
Caused by: java.lang.IndexOutOfBoundsException: Invalid index 0, size is 0
at java.util.ArrayList.throwIndexOutOfBoundsException(ArrayList.java:255)
at java.util.ArrayList.get(ArrayList.java:308)
at fr.free.nrw.commons.nearby.NearbyListFragment.loadAttractionsFromLocation(NearbyListFragment.java:308)
at fr.free.nrw.commons.nearby.NearbyListFragment.access$300(NearbyListFragment.java:27)
at fr.free.nrw.commons.nearby.NearbyListFragment$NearbyAsyncTask.doInBackground(NearbyListFragment.java:134)
at fr.free.nrw.commons.nearby.NearbyListFragment$NearbyAsyncTask.doInBackground(NearbyListFragment.java:112)
at android.os.AsyncTask$2.call(AsyncTask.java:292)
at java.util.concurrent.FutureTask.run(FutureTask.java:237)
... 4 more
java.lang.IndexOutOfBoundsException: Invalid index 0, size is 0
at java.util.ArrayList.throwIndexOutOfBoundsException(ArrayList.java:255)
at java.util.ArrayList.get(ArrayList.java:308)
at fr.free.nrw.commons.nearby.NearbyListFragment.loadAttractionsFromLocation(NearbyListFragment.java:308)
at fr.free.nrw.commons.nearby.NearbyListFragment.access$300(NearbyListFragment.java:27)
at fr.free.nrw.commons.nearby.NearbyListFragment$NearbyAsyncTask.doInBackground(NearbyListFragment.java:134)
at fr.free.nrw.commons.nearby.NearbyListFragment$NearbyAsyncTask.doInBackground(NearbyListFragment.java:112)
at android.os.AsyncTask$2.call(AsyncTask.java:292)
at java.util.concurrent.FutureTask.run(FutureTask.java:237)
at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:231)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
at java.lang.Thread.run(Thread.java:818)