Use buffered channel to prevent leak

Author: djzager

pkg/cache/internal/informers_map.go

@@ -164,17 +164,14 @@ func (ip *specificInformersMap) Get(ctx context.Context, gvk schema.GroupVersion
 	}
 
 	if started && !i.Informer.HasSynced() {
-		syncReturn := make(chan bool)
-		done := make(chan struct{})
+		syncReturn := make(chan bool, 1 /* don't leak goroutines on timeout */)
 		go func() {
-			syncReturn <- cache.WaitForCacheSync(done, i.Informer.HasSynced)
+			syncReturn <- cache.WaitForCacheSync(ctx.Done(), i.Informer.HasSynced)
 		}()
 
 		// Wait for it to sync before returning the Informer so that folks don't read from a stale cache.
 		select {
 		case <-ctx.Done():
-			//end the polling for cache to sync
-			done <- struct{}{}
 			return started, nil, apierrors.NewTimeoutError(fmt.Sprintf("timeout waiting for %T Informer to sync", obj), 0)
 		case syncSuccess := <-syncReturn:
 			if !syncSuccess {