From b04bd66bb2a11ddfe7a7c17d35ea87ea4e9160cb Mon Sep 17 00:00:00 2001
From: Nathan Shively-Sanders <nathansa@microsoft.com>
Date: Thu, 17 Dec 2015 16:18:55 -0800
Subject: [PATCH] Get type of target enum outside the lookup loop

---
 src/compiler/checker.ts | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/compiler/checker.ts b/src/compiler/checker.ts
index 488549cb180..f65a10b266a 100644
--- a/src/compiler/checker.ts
+++ b/src/compiler/checker.ts
@@ -5762,9 +5762,10 @@ namespace ts {
                     target.symbol.flags & SymbolFlags.ConstEnum) {
                     return Ternary.False;
                 }
+                const targetEnumType = getTypeOfSymbol(target.symbol);
                 for (const property of getPropertiesOfType(getTypeOfSymbol(source.symbol))) {
                     if (property.flags & SymbolFlags.EnumMember) {
-                        const targetProperty = getPropertyOfType(getTypeOfSymbol(target.symbol), property.name);
+                        const targetProperty = getPropertyOfType(targetEnumType, property.name);
                         if (!targetProperty || !(targetProperty.flags & SymbolFlags.EnumMember)) {
                             reportError(Diagnostics.Property_0_is_missing_in_type_1,
                                 property.name,