From 2b8f04af0caf4784d3fc40d26724fde8cec48631 Mon Sep 17 00:00:00 2001
From: Vladimir Matveev <vladima@microsoft.com>
Date: Wed, 16 Jul 2014 22:53:53 -0700
Subject: [PATCH] do not check inherited properties if interface has one item
 in heritage list

---
 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 10183d47763..7e935b03c19 100644
--- a/src/compiler/checker.ts
+++ b/src/compiler/checker.ts
@@ -2345,7 +2345,7 @@ module ts {
         }
 
         function checkInheritedPropertiesAreIdentical(type: InterfaceType, typeNode: Node): boolean {
-            if (!type.baseTypes.length) {
+            if (!type.baseTypes.length || type.baseTypes.length === 1) {
                 return true;
             }