Version 4.6.85.18 (cherry-pick)

src/object-observe.js

Index: src/object-observe.js
diff --git a/src/object-observe.js b/src/object-observe.js
index dfd3a4865287c978e63e1330cec2dd8897c19e79..af01a18a8f50f38ec7ce1aaf1456a627bfcd589e 100644
--- a/src/object-observe.js
+++ b/src/object-observe.js
@@ -388,6 +388,8 @@ function ObjectObserve(object, callback, acceptList) {
     throw MakeTypeError(kObserveNonObject, "observe", "observe");
   if (%IsJSGlobalProxy(object))
     throw MakeTypeError(kObserveGlobalProxy, "observe");
+  if (%IsAccessCheckNeeded(object))
+    throw MakeTypeError(kObserveAccessChecked, "observe");
   if (!IS_SPEC_FUNCTION(callback))
     throw MakeTypeError(kObserveNonFunction, "observe");
   if (ObjectIsFrozen(callback))
@@ -616,6 +618,8 @@ function ObjectGetNotifier(object) {
     throw MakeTypeError(kObserveNonObject, "getNotifier", "getNotifier");
   if (%IsJSGlobalProxy(object))
     throw MakeTypeError(kObserveGlobalProxy, "getNotifier");
+  if (%IsAccessCheckNeeded(object))
+    throw MakeTypeError(kObserveAccessChecked, "getNotifier");
 
   if (ObjectIsFrozen(object)) return null;