Make sure EventBase task destructor runs with the correct RequestContext

Reviewed By: yfeldblum

Differential Revision: D22604684

fbshipit-source-id: 4dedb9c831d0a2137d16bbe0514e00a1c8f77f4a

folly/io/async/NotificationQueue.h

@@ -729,6 +729,9 @@ void NotificationQueue<MessageT>::Consumer::consumeMessages(
       messageAvailable(std::move(data->msg_));
       destroyedFlagPtr_ = nullptr;
 
+      // Make sure message destructor is called with the correct RequestContext.
+      data.reset();
+
       // If the callback was destroyed before it returned, we are done
       if (callbackDestroyed) {
         return;