From 8e91cdd10c72fd6d4bbbcc4076c0481ba78ec970 Mon Sep 17 00:00:00 2001
From: Thomas Mair <thomas.mair86@gmail.com>
Date: Thu, 15 Feb 2018 10:18:29 +0100
Subject: [PATCH] fix(core): fix memory leak on application reference destroy

When an application reference is destroyed it stays in memory because it is still registered in the testability registry.

Closes #22106, #13725
---
 packages/core/src/application_ref.ts | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/packages/core/src/application_ref.ts b/packages/core/src/application_ref.ts
index 87e8bfb1ff692..788ad8158a5f0 100644
--- a/packages/core/src/application_ref.ts
+++ b/packages/core/src/application_ref.ts
@@ -564,6 +564,10 @@ export class ApplicationRef {
   private _unloadComponent(componentRef: ComponentRef<any>): void {
     this.detachView(componentRef.hostView);
     remove(this.components, componentRef);
+    const testabilityRegistry = componentRef.injector.get(TestabilityRegistry, null);
+    if (testabilityRegistry) {
+      testabilityRegistry.unregisterApplication(componentRef.location.nativeElement);
+    }
   }
 
   /** @internal */