From a9e924b6f0edb02c719a77f6d11fbae4704574e7 Mon Sep 17 00:00:00 2001
From: Anders Hejlsberg <andersh@microsoft.com>
Date: Thu, 7 Mar 2019 07:06:48 -0800
Subject: [PATCH] Fix check for function type (allow checked type to have
 overloads)

---
 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 c6a866582a4..3fa48688201 100644
--- a/src/compiler/checker.ts
+++ b/src/compiler/checker.ts
@@ -20925,7 +20925,7 @@ namespace ts {
         }
 
         function isGenericFunctionReturningFunction(signature: Signature) {
-            return !!(signature.typeParameters && getSingleCallSignature(getReturnTypeOfSignature(signature)));
+            return !!(signature.typeParameters && isFunctionType(getReturnTypeOfSignature(signature)));
         }
 
         /**