From a277e97dd79b53fdbc9e0283a7ebbaa8caed94c4 Mon Sep 17 00:00:00 2001
From: Dzmitry Shylovich <Dzmitry_Shylovich@epam.com>
Date: Sat, 3 Dec 2016 23:32:47 +0300
Subject: [PATCH] fix(core): ViewContainerRef.indexOf doesn't throw error when
 empty (#13220)

PR Close #13220
---
 modules/@angular/core/src/linker/view_container_ref.ts | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/modules/@angular/core/src/linker/view_container_ref.ts b/modules/@angular/core/src/linker/view_container_ref.ts
index d21ff0f669..947f8a1dc1 100644
--- a/modules/@angular/core/src/linker/view_container_ref.ts
+++ b/modules/@angular/core/src/linker/view_container_ref.ts
@@ -186,7 +186,8 @@ export class ViewContainerRef_ implements ViewContainerRef {
   }
 
   indexOf(viewRef: ViewRef): number {
-    return this._element.nestedViews.indexOf((<ViewRef_<any>>viewRef).internalView);
+    return this.length ? this._element.nestedViews.indexOf((<ViewRef_<any>>viewRef).internalView) :
+                         -1;
   }
 
   /** @internal */
@@ -213,7 +214,7 @@ export class ViewContainerRef_ implements ViewContainerRef {
     return wtfLeave(s, view.ref);
   }
 
-  clear() {
+  clear(): void {
     for (let i = this.length - 1; i >= 0; i--) {
       this.remove(i);
     }