Merge pull request #145 from...

Merge pull request #145 from benjaminbollen/issue143_concurrency_bug_in_tendermint_event_remove_listener

Issue #143 concurrency bug in godeps/tendermint/event RemoveListener

Godeps/_workspace/src/github.com/tendermint/tendermint/events/events.go

@@ -69,13 +69,15 @@ func (evsw *EventSwitch) RemoveListener(listenerID string) {
 	// Get and remove listener
 	evsw.mtx.RLock()
 	listener := evsw.listeners[listenerID]
-	delete(evsw.listeners, listenerID)
 	evsw.mtx.RUnlock()
-
 	if listener == nil {
 		return
 	}
 
+	evsw.mtx.Lock()
+	delete(evsw.listeners, listenerID)
+	evsw.mtx.Unlock()
+
 	// Remove callback for each event.
 	listener.SetRemoved()
 	for _, event := range listener.GetEvents() {