Clarify networking call order during registration flow.

app/src/main/java/org/thoughtcrime/securesms/util/CircularProgressButtonUtil.kt

@@ -0,0 +1,24 @@
+package org.thoughtcrime.securesms.util
+
+import com.dd.CircularProgressButton
+
+object CircularProgressButtonUtil {
+
+  @JvmStatic
+  fun setSpinning(button: CircularProgressButton?) {
+    button?.apply {
+      isClickable = false
+      isIndeterminateProgressMode = true
+      progress = 50
+    }
+  }
+
+  @JvmStatic
+  fun cancelSpinning(button: CircularProgressButton?) {
+    button?.apply {
+      progress = 0
+      isIndeterminateProgressMode = false
+      isClickable = true
+    }
+  }
+}

app/src/main/java/org/thoughtcrime/securesms/util/LifecycleDisposable.kt

@@ -23,6 +23,7 @@ class LifecycleDisposable : DefaultLifecycleObserver {
   }
 
   override fun onDestroy(owner: LifecycleOwner) {
+    owner.lifecycle.removeObserver(this)
     disposables.clear()
   }
 }

app/src/main/java/org/thoughtcrime/securesms/util/SignalUncaughtExceptionHandler.java

@@ -8,6 +8,8 @@ import org.thoughtcrime.securesms.keyvalue.SignalStore;
 
 import java.util.concurrent.TimeUnit;
 
+import io.reactivex.rxjava3.exceptions.OnErrorNotImplementedException;
+
 public class SignalUncaughtExceptionHandler implements Thread.UncaughtExceptionHandler {
 
   private static final String TAG = Log.tag(SignalUncaughtExceptionHandler.class);
@@ -20,6 +22,10 @@ public class SignalUncaughtExceptionHandler implements Thread.UncaughtExceptionH
 
   @Override
   public void uncaughtException(@NonNull Thread t, @NonNull Throwable e) {
+    if (e instanceof OnErrorNotImplementedException) {
+      e = e.getCause();
+    }
+
     Log.e(TAG, "", e, true);
     SignalStore.blockUntilAllWritesFinished();
     Log.blockUntilAllWritesFinished();