From 1cd5309f7dec081960e992b47f238286537c3f50 Mon Sep 17 00:00:00 2001
From: Anders Hejlsberg <andersh@microsoft.com>
Date: Sun, 28 Sep 2025 22:55:30 +0200
Subject: [PATCH] Port https://github.com/microsoft/typescript-go/pull/1759
 (#62502)

---
 src/compiler/checker.ts                               | 11 ++++-------
 ...sDeclarationsFunctionClassesCjsExportAssignment.js |  2 +-
 2 files changed, 5 insertions(+), 8 deletions(-)

diff --git a/src/compiler/checker.ts b/src/compiler/checker.ts
index 10376e268a4..75f68783020 100644
--- a/src/compiler/checker.ts
+++ b/src/compiler/checker.ts
@@ -24457,16 +24457,13 @@ export function createTypeChecker(host: TypeCheckerHost): TypeChecker {
                 }
                 return Ternary.False;
             }
-            if (isObjectLiteralType(target)) {
+            if (getObjectFlags(target) & ObjectFlags.FreshLiteral) {
                 for (const sourceProp of excludeProperties(getPropertiesOfType(source), excludedProperties)) {
                     if (!getPropertyOfObjectType(target, sourceProp.escapedName)) {
-                        const sourceType = getTypeOfSymbol(sourceProp);
-                        if (!(sourceType.flags & TypeFlags.Undefined)) {
-                            if (reportErrors) {
-                                reportError(Diagnostics.Property_0_does_not_exist_on_type_1, symbolToString(sourceProp), typeToString(target));
-                            }
-                            return Ternary.False;
+                        if (reportErrors) {
+                            reportError(Diagnostics.Property_0_does_not_exist_on_type_1, symbolToString(sourceProp), typeToString(target));
                         }
+                        return Ternary.False;
                     }
                 }
             }
diff --git a/tests/baselines/reference/jsDeclarationsFunctionClassesCjsExportAssignment.js b/tests/baselines/reference/jsDeclarationsFunctionClassesCjsExportAssignment.js
index 2d051216e7a..129d1c42d9a 100644
--- a/tests/baselines/reference/jsDeclarationsFunctionClassesCjsExportAssignment.js
+++ b/tests/baselines/reference/jsDeclarationsFunctionClassesCjsExportAssignment.js
@@ -210,7 +210,7 @@ declare class Context {
      * @param {Input} input
      */
     constructor(input: Input);
-    state: any;
+    state: State;
     /**
      * @param {Input} input
      * @param {HookHandler=} handle