From 11c4c4cd61cbc2f0a42f7bd81e55bbf9b4c7a70f Mon Sep 17 00:00:00 2001
From: Anders Hejlsberg <andersh@microsoft.com>
Date: Tue, 22 Aug 2017 17:41:07 +0100
Subject: [PATCH] Fix to use correct target type ID

---
 src/compiler/checker.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/compiler/checker.ts b/src/compiler/checker.ts
index b179231736c..3accf163738 100644
--- a/src/compiler/checker.ts
+++ b/src/compiler/checker.ts
@@ -9780,7 +9780,7 @@ namespace ts {
         }
 
         function getTypeReferenceId(type: TypeReference, typeParameters: Type[]) {
-            let result = "" + type.id;
+            let result = "" + type.target.id;
             for (const t of type.typeArguments) {
                 if (isUnconstrainedTypeParameter(t)) {
                     let index = indexOf(typeParameters, t);