From adefdc79538d171435ddb8a37f5a543556803495 Mon Sep 17 00:00:00 2001
From: Nathan Shively-Sanders <nathansa@microsoft.com>
Date: Tue, 18 Apr 2017 14:56:11 -0700
Subject: [PATCH] Unknown properties are assignable to Object unions

For the last week or so they have been treated as excess properties when
assigning to a union type containing Object, but not when assigning directly
to Object type.
---
 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 353356c208b..c0e3c490831 100644
--- a/src/compiler/checker.ts
+++ b/src/compiler/checker.ts
@@ -8708,7 +8708,7 @@ namespace ts {
                 if (maybeTypeOfKind(target, TypeFlags.Object) && !(getObjectFlags(target) & ObjectFlags.ObjectLiteralPatternWithComputedProperties)) {
                     const isComparingJsxAttributes = !!(source.flags & TypeFlags.JsxAttributes);
                     if ((relation === assignableRelation || relation === comparableRelation) &&
-                        (target === globalObjectType || (!isComparingJsxAttributes && isEmptyObjectType(target)))) {
+                        (isTypeSubsetOf(globalObjectType, target) || (!isComparingJsxAttributes && isEmptyObjectType(target)))) {
                         return false;
                     }
                     for (const prop of getPropertiesOfObjectType(source)) {