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Don't check in newSubscriberCoincidenceInner whether occRef is already set #496

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Don't check in newSubscriberCoincidenceInner whether occRef is already set #496

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4 changes: 3 additions & 1 deletion src/Reflex/Spider/Internal.hs
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Original file line number Diff line number Diff line change
Expand Up @@ -535,10 +535,12 @@ newSubscriberCoincidenceOuter subscribed = debugSubscriber ("SubscriberCoinciden
newSubscriberCoincidenceInner :: forall x a. HasSpiderTimeline x => CoincidenceSubscribed x a -> IO (Subscriber x a)
newSubscriberCoincidenceInner subscribed = debugSubscriber ("SubscriberCoincidenceInner" <> showNodeId subscribed) $ Subscriber
{ subscriberPropagate = \a -> {-# SCC "traverseCoincidenceInner" #-} do
#ifdef DEBUG
occ <- liftIO $ readIORef $ coincidenceSubscribedOccurrence subscribed
case occ of
Just _ -> return () -- SubscriberCoincidenceOuter must have already propagated this event
Just _ -> error "Coincidence inner is propagating, but coincidence occurrence is already known?"
Nothing -> do
#endif
liftIO $ writeIORef (coincidenceSubscribedOccurrence subscribed) $ Just a
scheduleClear $ coincidenceSubscribedOccurrence subscribed
propagate a $ coincidenceSubscribedSubscribers subscribed
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