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• Android version: 8.1.0
• Phone model: OnePlus A5000 (OnePlus5)
• Briar version: 1.0.13 (55d8f853)

Stacktrace:

java.lang.IllegalArgumentException: Scrapped or attached views may not be recycled. isScrap:false isAttached:true android.support.v7.widget.RecyclerView{bb19834 VFED.V... ........ 0,0-1080,1599 #7f09012b app:id/recyclerView}, adapter:org.briarproject.briar.android.contact.ConversationAdapter@40dedd1, layout:android.support.v7.widget.LinearLayoutManager@90a2036, context:org.briarproject.briar.android.contact.ConversationActivity@b8d5bc6
        at android.support.v7.widget.RecyclerView$Recycler.recycleViewHolderInternal(RecyclerView.java:6053)
        at android.support.v7.widget.RecyclerView$Recycler.recycleView(RecyclerView.java:5997)
        at android.support.v7.widget.GapWorker.prefetchPositionWithDeadline(GapWorker.java:292)
        at android.support.v7.widget.GapWorker.flushTaskWithDeadline(GapWorker.java:342)
        at android.support.v7.widget.GapWorker.flushTasksWithDeadline(GapWorker.java:358)
        at android.support.v7.widget.GapWorker.prefetch(GapWorker.java:365)
        at android.support.v7.widget.GapWorker.run(GapWorker.java:396)
        at android.os.Handler.handleCallback(Handler.java:790)
        at android.os.Handler.dispatchMessage(Handler.java:99)
        at android.os.Looper.loop(Looper.java:164)
        at android.app.ActivityThread.main(ActivityThread.java:6753)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:482)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:807)

Log:

08-08 21:39:57.411 I/ConnectionRegistryImpl: Outgoing connection registered: org.briarproject.bramble.tor
08-08 21:39:57.412 I/ConnectionRegistryImpl: Contact connected
08-08 21:39:57.412 I/ConversationActivity: Contact connected
08-08 21:39:57.615 I/Poller: Polling plugin org.briarproject.bramble.tor
08-08 21:39:57.621 I/ConnectionRegistryImpl: 1 contacts connected: org.briarproject.bramble.tor
08-08 21:39:57.621 I/TorPlugin: Connecting to ojd[scrubbed]
08-08 21:40:03.376 I/BriarRecyclerView: Adding Handler Callback
08-08 21:40:03.376 I/AndroidDatabaseConfig: Database key has been set: true

The last two log lines suggest an activity had just started. The previous log lines show that ConversationActivity was recently active, and that's reported as the context of the crash in the stacktrace. So the crash may have occurred while navigating away from ConversationActivity.