fix(debounce): support scalar selectors

Closes #3232
ReactiveX · Jan 19, 2018 · 5a633f9 · 5a633f9
1 parent 336847b
commit 5a633f9
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/src/internal/operators/debounce.ts b/src/internal/operators/debounce.ts
@@ -105,7 +105,7 @@ class DebounceSubscriber<T, R> extends OuterSubscriber<T, R> {
     }
 
     subscription = subscribeToResult(this, duration);
-    if (!subscription.closed) {
+    if (subscription && !subscription.closed) {
       this.add(this.durationSubscription = subscription);
     }
   }