Move the ReferenceError check out of SetPropertyInternal. SetSuperProperty cannot need this case.

src/objects.cc

Index: src/objects.cc
diff --git a/src/objects.cc b/src/objects.cc
index f3d492955bfab448238de125ab7e519fc497085c..12b206cce9fb863d23bc9e611126ea5c0a1cb70f 100644
--- a/src/objects.cc
+++ b/src/objects.cc
@@ -4209,15 +4209,6 @@ Maybe<bool> Object::SetPropertyInternal(LookupIterator* it,
     if (done) break;
   }
 
-  // If the receiver is the JSGlobalObject, the store was contextual. In case
-  // the property did not exist yet on the global object itself, we have to
-  // throw a reference error in strict mode.  In sloppy mode, we continue.
-  if (it->GetReceiver()->IsJSGlobalObject() && is_strict(language_mode)) {
-    it->isolate()->Throw(*it->isolate()->factory()->NewReferenceError(
-        MessageTemplate::kNotDefined, it->name()));
-    return Nothing<bool>();
-  }
-
   *found = false;
   return Nothing<bool>();
 }
@@ -4230,6 +4221,16 @@ Maybe<bool> Object::SetProperty(LookupIterator* it, Handle<Object> value,
   Maybe<bool> result =
       SetPropertyInternal(it, value, language_mode, store_mode, &found);
   if (found) return result;
+
+  // If the receiver is the JSGlobalObject, the store was contextual. In case
+  // the property did not exist yet on the global object itself, we have to
+  // throw a reference error in strict mode.  In sloppy mode, we continue.
+  if (is_strict(language_mode) && it->GetReceiver()->IsJSGlobalObject()) {
+    it->isolate()->Throw(*it->isolate()->factory()->NewReferenceError(
+        MessageTemplate::kNotDefined, it->name()));
+    return Nothing<bool>();
+  }
+
   ShouldThrow should_throw =
       is_sloppy(language_mode) ? DONT_THROW : THROW_ON_ERROR;
   return AddDataProperty(it, value, NONE, should_throw, store_mode);