Throw TypeError when reading global references through a JSProxy

src/objects.cc

Index: src/objects.cc
diff --git a/src/objects.cc b/src/objects.cc
index 732477cd81ff9852091de87e7a262a58e2bcecfc..431559d4f396104543f9c4760dfe0bd67f106fd7 100644
--- a/src/objects.cc
+++ b/src/objects.cc
@@ -828,6 +828,13 @@ MaybeHandle<Object> JSProxy::GetProperty(Isolate* isolate,
                                          Handle<Name> name,
                                          Handle<Object> receiver,
                                          LanguageMode language_mode) {
+  if (receiver->IsJSGlobalObject()) {
+    THROW_NEW_ERROR(
+        isolate,
+        NewTypeError(MessageTemplate::kReadGlobalReferenceThroughProxy, name),
+        Object);
+  }
+
   STACK_CHECK(MaybeHandle<Object>());
   Handle<Name> trap_name = isolate->factory()->get_string();
   // 1. Assert: IsPropertyKey(P) is true.