From 7bd2a6eeb73da9cf178c066dd37804ce8ecfdf2b Mon Sep 17 00:00:00 2001
From: Anders Hejlsberg <andersh@microsoft.com>
Date: Tue, 30 Aug 2022 07:41:04 -0700
Subject: [PATCH] Only normalize intersections that include {}

---
 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 01fc87bae36..9fede5c23ef 100644
--- a/src/compiler/checker.ts
+++ b/src/compiler/checker.ts
@@ -18493,7 +18493,7 @@ namespace ts {
             if (reduced !== type) {
                 return reduced;
             }
-            if (type.flags & TypeFlags.Intersection) {
+            if (type.flags & TypeFlags.Intersection && some((type as IntersectionType).types, isEmptyAnonymousObjectType)) {
                 const normalizedTypes = sameMap(type.types, t => getNormalizedType(t, writing));
                 if (normalizedTypes !== type.types) {
                     return getIntersectionType(normalizedTypes);