From 3a926b939e4d8fee9457af3d0e7a992ea26e2462 Mon Sep 17 00:00:00 2001
From: John Cheevers <john@cheevers.org>
Date: Fri, 10 Feb 2017 11:13:40 -0600
Subject: [PATCH] fix(throttle): ChildSubscriptions removed on inner
 unsubscribe (#2355)

Hold reference to ChildSubscription, not Subscription, so it can be properly removed later.
---
 src/operator/throttle.ts | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/src/operator/throttle.ts b/src/operator/throttle.ts
index fc352ad71b..1993a356b5 100644
--- a/src/operator/throttle.ts
+++ b/src/operator/throttle.ts
@@ -89,14 +89,13 @@ class ThrottleSubscriber<T, R> extends OuterSubscriber<T, R> {
   }
 
   private emitAndThrottle(value: T, duration: SubscribableOrPromise<number>) {
-    this.add(this.throttled = subscribeToResult(this, duration));
+    this.throttled = this.add(subscribeToResult(this, duration));
     this.destination.next(value);
   }
 
   protected _unsubscribe() {
     const throttled = this.throttled;
     if (throttled) {
-      this.remove(throttled);
       this.throttled = null;
       throttled.unsubscribe();
     }