js: Fix that auto completion of properties failed

For this we store the global environment in which we can do a lookup
for the references variable. This is probably not entirely as the spec
would specify as we would need a running executing context at all times
you do things with references.

Fixes SerenityOS#10281

Userland/Utilities/js.cpp

@@ -1174,6 +1174,8 @@ int main(int argc, char** argv)
 #endif
  interpreter->vm().set_underscore_is_last_value(true);
 
+ auto& global_environment = interpreter->realm().global_environment();
+
  s_editor = Line::Editor::construct();
  s_editor->load_history(s_history_path);
 
@@ -1246,7 +1248,7 @@ int main(int argc, char** argv)
  editor.set_prompt(prompt_for_level(open_indents));
  };
 
- auto complete = [&interpreter](Line::Editor const& editor) -> Vector<Line::CompletionSuggestion> {
+ auto complete = [&interpreter, &global_environment](Line::Editor const& editor) -> Vector<Line::CompletionSuggestion> {
  auto line = editor.line(editor.cursor());
 
  JS::Lexer lexer { line };
@@ -1337,18 +1339,13 @@ int main(int argc, char** argv)
  switch (mode) {
  case CompleteProperty: {
  Optional<JS::Value> maybe_value;
- auto maybe_variable = vm->resolve_binding(variable_name);
+ auto maybe_variable = vm->resolve_binding(variable_name, &global_environment);
  if (vm->exception())
  break;
- if (!maybe_variable.is_unresolvable()) {
- maybe_value = maybe_variable.get_value(interpreter->global_object());
- if (vm->exception())
- break;
- } else {
- maybe_value = interpreter->global_object().get(FlyString(variable_name));
- if (maybe_value->is_empty())
- break;
- }
+ maybe_value = maybe_variable.get_value(interpreter->global_object());
+ if (vm->exception())
+ break;
+ VERIFY(!maybe_value->is_empty());
 
  auto variable = *maybe_value;
  if (!variable.is_object())