From bc7cde0f01d248ee0afec5a85efd365805f7a684 Mon Sep 17 00:00:00 2001
From: Pete Bacon Darwin <pete@bacondarwin.com>
Date: Tue, 3 Dec 2019 08:47:12 +0000
Subject: [PATCH] fix(core): ensure that `ngI18nClosureMode` is guarded
 (#34211)

If the `ngI18nClosureMode` global check actually makes it
through to the runtime, then checks for its existence should
be guarded to prevent `Reference undefined` errors in strict
mode.

(Normally, it is stripped out by dead code elimination during
build optimization.)

PR Close #34211
---
 packages/core/src/application_module.ts | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/packages/core/src/application_module.ts b/packages/core/src/application_module.ts
index 2030c63631..3f71df4468 100644
--- a/packages/core/src/application_module.ts
+++ b/packages/core/src/application_module.ts
@@ -49,7 +49,8 @@ export function _localeFactory(locale?: string): string {
  * * Ivy enabled: use `$localize.locale`
  */
 export function getGlobalLocale(): string {
-  if (ngI18nClosureMode && typeof goog !== 'undefined' && goog.LOCALE !== 'en') {
+  if (typeof ngI18nClosureMode !== 'undefined' && ngI18nClosureMode &&
+      typeof goog !== 'undefined' && goog.LOCALE !== 'en') {
     // * The default `goog.LOCALE` value is `en`, while Angular used `en-US`.
     // * In order to preserve backwards compatibility, we use Angular default value over
     //   Closure Compiler's one.