crash after joining

Using v0.89-test, FDroid crashed while going through the swap procedure. I was on the wifi screen, I clicked on it to bring up the wifi settings, (I use a custom one called WiFi Manager, but I think that's unrelated). It said "enabling wifi". Then it enabled it, and connected to a network. Then I got notification that FDroid crashed. I was still in WiFi Manager. Here's the stacktrace:

        AndroidRuntime  E  FATAL EXCEPTION: main
                        E  java.lang.IllegalStateException: Can not perform this action after onSaveInstanceState
                        E      at android.support.v4.app.FragmentManagerImpl.checkStateLoss(FragmentManager.java:1360)
                        E      at android.support.v4.app.FragmentManagerImpl.enqueueAction(FragmentManager.java:1378)
                        E      at android.support.v4.app.BackStackRecord.commitInternal(BackStackRecord.java:595)
                        E      at android.support.v4.app.BackStackRecord.commit(BackStackRecord.java:574)
                        E      at org.fdroid.fdroid.views.swap.SwapActivity.showFragment(SwapActivity.java:153)
                        E      at org.fdroid.fdroid.views.swap.SwapActivity.showJoinWifi(SwapActivity.java:129)
                        E      at org.fdroid.fdroid.views.swap.SwapActivity.onLocalRepoPrepared(SwapActivity.java:179)
                        E      at org.fdroid.fdroid.views.swap.SwapActivity.access$500(SwapActivity.java:27)
                        E      at org.fdroid.fdroid.views.swap.SwapActivity$UpdateAsyncTask.onPostExecute(SwapActivity.java:286)
                        E      at org.fdroid.fdroid.views.swap.SwapActivity$UpdateAsyncTask.onPostExecute(SwapActivity.java:218)
                        E      at android.os.AsyncTask.finish(AsyncTask.java:631)
                        E      at android.os.AsyncTask.access$600(AsyncTask.java:177)
                        E      at android.os.AsyncTask$InternalHandler.handleMessage(AsyncTask.java:644)
                        E      at android.os.Handler.dispatchMessage(Handler.java:99)
                        E      at android.os.Looper.loop(Looper.java:137)
                        E      at android.app.ActivityThread.main(ActivityThread.java:5227)
                        E      at java.lang.reflect.Method.invokeNative(Native Method)
                        E      at java.lang.reflect.Method.invoke(Method.java:511)
                        E      at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:795)
                        E      at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:562)
                        E      at dalvik.system.NativeStart.main(Native Method)