From fa65bd20621536e6c7272e05dad9af5a7f36aeeb Mon Sep 17 00:00:00 2001
From: Anders Hejlsberg <andersh@microsoft.com>
Date: Sat, 14 Oct 2017 09:53:51 -0700
Subject: [PATCH] Mapped type { [P in any]: T } should yield { [x: string]: T }

---
 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 f8f63bfe0f7..9f4e3a60eb1 100644
--- a/src/compiler/checker.ts
+++ b/src/compiler/checker.ts
@@ -5821,7 +5821,7 @@ namespace ts {
                     prop.syntheticLiteralTypeOrigin = t as StringLiteralType;
                     members.set(propName, prop);
                 }
-                else if (t.flags & TypeFlags.String) {
+                else if (t.flags & (TypeFlags.Any | TypeFlags.String)) {
                     stringIndexInfo = createIndexInfo(propType, templateReadonly);
                 }
             }