From 7cdc65b2a5ecb455b23800ecd93a65f4f2025be0 Mon Sep 17 00:00:00 2001
From: Anders Hejlsberg <andersh@microsoft.com>
Date: Fri, 21 Jun 2019 18:00:26 -1000
Subject: [PATCH] Out of bounds tuple elements have type 'undefined'

---
 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 e071cc9f96c..9cb08b3e440 100644
--- a/src/compiler/checker.ts
+++ b/src/compiler/checker.ts
@@ -14440,7 +14440,7 @@ namespace ts {
             if (propType) {
                 return propType;
             }
-            if (everyType(type, isTupleType) && !everyType(type, t => !(<TupleTypeReference>t).target.hasRestElement)) {
+            if (everyType(type, isTupleType)) {
                 return mapType(type, t => getRestTypeOfTupleType(<TupleTypeReference>t) || undefinedType);
             }
             return undefined;