From 01516c84d2ce87c387b3bf037af2e90a25a6c213 Mon Sep 17 00:00:00 2001
From: Anders Hejlsberg <andersh@microsoft.com>
Date: Tue, 30 Jan 2018 06:47:58 -0800
Subject: [PATCH] Update to use TypeFlags.Instantiable in instantiateSymbol

---
 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 8c97259107b..a6c0e436e8d 100644
--- a/src/compiler/checker.ts
+++ b/src/compiler/checker.ts
@@ -8591,7 +8591,7 @@ namespace ts {
 
         function instantiateSymbol(symbol: Symbol, mapper: TypeMapper): Symbol {
             const links = getSymbolLinks(symbol);
-            if (links.type && !maybeTypeOfKind(links.type, TypeFlags.Object | TypeFlags.TypeVariable | TypeFlags.Index)) {
+            if (links.type && !maybeTypeOfKind(links.type, TypeFlags.Object | TypeFlags.Instantiable)) {
                 // If the type of the symbol is already resolved, and if that type could not possibly
                 // be affected by instantiation, simply return the symbol itself.
                 return symbol;