Strawman: check strong mode free variables against the global object.

src/pending-compilation-error-handler.cc

 // Copyright 2015 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/pending-compilation-error-handler.h"
 
 #include "src/debug.h"
 #include "src/handles.h"
 #include "src/isolate.h"
 #include "src/messages.h"
 
 namespace v8 {
 namespace internal {
 
 void PendingCompilationErrorHandler::ThrowPendingError(Isolate* isolate,
                                                        Handle<Script> script) {
   if (!has_pending_error_) return;
   MessageLocation location(script, start_position_, end_position_);
   Factory* factory = isolate->factory();
-  bool has_arg = arg_ != NULL || char_arg_ != NULL;
+  bool has_arg = arg_ != NULL || char_arg_ != NULL || !handle_arg_.is_null();
   Handle<FixedArray> elements = factory->NewFixedArray(has_arg ? 1 : 0);
   if (arg_ != NULL) {
     Handle<String> arg_string = arg_->string();
     elements->set(0, *arg_string);
   } else if (char_arg_ != NULL) {
     Handle<String> arg_string =
         factory->NewStringFromUtf8(CStrVector(char_arg_)).ToHandleChecked();
     elements->set(0, *arg_string);
+  } else if (!handle_arg_.is_null()) {
+    elements->set(0, *handle_arg_);
   }
   isolate->debug()->OnCompileError(script);
 
   Handle<JSArray> array = factory->NewJSArrayWithElements(elements);
   Handle<Object> error;
 
   switch (error_type_) {
     case kReferenceError:
       error = factory->NewReferenceError(message_, array);
       break;
@@ skipping 14 matching lines @@
                         handle(Smi::FromInt(location.end_pos()), isolate),
                         SLOPPY).Check();
 
   Handle<Name> key_script = factory->error_script_symbol();
   JSObject::SetProperty(jserror, key_script, script, SLOPPY).Check();
 
   isolate->Throw(*error, &location);
 }
 }
 }  // namespace v8::internal