From 8c477b2f4539307cd1dfb35b706026f74ea96ef1 Mon Sep 17 00:00:00 2001
From: Steve Sewell <sewell.steve@gmail.com>
Date: Tue, 11 Oct 2016 15:47:44 -0700
Subject: [PATCH] fix(compiler-cli): don't clone static symbols when
 simplifying annotation metadata (#12158)

---
 modules/@angular/compiler-cli/src/static_reflector.ts       | 3 +++
 modules/@angular/compiler-cli/test/static_reflector_spec.ts | 5 +++++
 2 files changed, 8 insertions(+)

diff --git a/modules/@angular/compiler-cli/src/static_reflector.ts b/modules/@angular/compiler-cli/src/static_reflector.ts
index 1d221cea85..5e92309ab9 100644
--- a/modules/@angular/compiler-cli/src/static_reflector.ts
+++ b/modules/@angular/compiler-cli/src/static_reflector.ts
@@ -368,6 +368,9 @@ export class StaticReflector implements ReflectorReader {
           }
           return result;
         }
+        if (expression instanceof StaticSymbol) {
+          return expression;
+        }
         if (expression) {
           if (expression['__symbolic']) {
             let staticSymbol: StaticSymbol;
diff --git a/modules/@angular/compiler-cli/test/static_reflector_spec.ts b/modules/@angular/compiler-cli/test/static_reflector_spec.ts
index d909324ebf..fe6733321f 100644
--- a/modules/@angular/compiler-cli/test/static_reflector_spec.ts
+++ b/modules/@angular/compiler-cli/test/static_reflector_spec.ts
@@ -119,6 +119,11 @@ describe('StaticReflector', () => {
     expect(simplify(noContext, 'some value')).toBe('some value');
   });
 
+  it('should simplify a static symbol into itself', () => {
+    const staticSymbol = new StaticSymbol('', '');
+    expect(simplify(noContext, staticSymbol)).toBe(staticSymbol);
+  });
+
   it('should simplify an array into a copy of the array', () => {
     expect(simplify(noContext, [1, 2, 3])).toEqual([1, 2, 3]);
   });