From 71e52dea923670fac1b8373ec041009bd0cc95ba Mon Sep 17 00:00:00 2001
From: Kanchalai Tanglertsampan <yuisu@microsoft.com>
Date: Tue, 21 Mar 2017 08:38:01 -0700
Subject: [PATCH] finish remove unused yieldTypes

---
 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 f550fcf9c35..43311c81f7b 100644
--- a/src/compiler/checker.ts
+++ b/src/compiler/checker.ts
@@ -15138,7 +15138,7 @@ namespace ts {
                     }
                 }
                 // Return a union of the return expression types.
-                type = getUnionType(yieldTypes ? yieldTypes.concat(types) : types, /*subtypeReduction*/ true);
+                type = getUnionType(types, /*subtypeReduction*/ true);
 
                 if (functionFlags & FunctionFlags.Generator) { // AsyncGenerator function or Generator function
                     type = functionFlags & FunctionFlags.Async