From 3d20c501564d0d10427d5dff5c2b1f8376a68697 Mon Sep 17 00:00:00 2001
From: George Kalpakas <kalpakas.g@gmail.com>
Date: Mon, 25 Jun 2018 22:34:46 +0300
Subject: [PATCH] fix(ivy): correctly resolve Array  property access (#24664)

PR Close #24664
---
 packages/compiler-cli/src/ngtsc/metadata/src/resolver.ts       | 2 +-
 packages/compiler-cli/src/ngtsc/metadata/test/resolver_spec.ts | 3 +++
 2 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/packages/compiler-cli/src/ngtsc/metadata/src/resolver.ts b/packages/compiler-cli/src/ngtsc/metadata/src/resolver.ts
index e84c84b52e..9740d4e222 100644
--- a/packages/compiler-cli/src/ngtsc/metadata/src/resolver.ts
+++ b/packages/compiler-cli/src/ngtsc/metadata/src/resolver.ts
@@ -460,7 +460,7 @@ class StaticInterpreter {
       }
     } else if (Array.isArray(lhs)) {
       if (rhs === 'length') {
-        return rhs.length;
+        return lhs.length;
       }
       if (typeof rhs !== 'number' || !Number.isInteger(rhs)) {
         return DYNAMIC_VALUE;
diff --git a/packages/compiler-cli/src/ngtsc/metadata/test/resolver_spec.ts b/packages/compiler-cli/src/ngtsc/metadata/test/resolver_spec.ts
index 5498f4aa57..7a41ad3595 100644
--- a/packages/compiler-cli/src/ngtsc/metadata/test/resolver_spec.ts
+++ b/packages/compiler-cli/src/ngtsc/metadata/test/resolver_spec.ts
@@ -112,6 +112,9 @@ describe('ngtsc metadata', () => {
   it('array access works',
      () => { expect(evaluate(`const a = [1, 2, 3];`, 'a[1] + a[0]')).toEqual(3); });
 
+  it('array `length` property access works',
+     () => { expect(evaluate(`const a = [1, 2, 3];`, 'a[\'length\'] + 1')).toEqual(4); });
+
   it('negation works', () => {
     expect(evaluate(`const x = 3;`, '!x')).toEqual(false);
     expect(evaluate(`const x = 3;`, '!!x')).toEqual(true);