deps.patch

diff --git core/includes/install.inc core/includes/install.inc
index 61725da..43c66d6 100644
--- core/includes/install.inc
+++ core/includes/install.inc
@@ -940,6 +940,7 @@ function drupal_check_profile($profile) {
   $listing = new ExtensionDiscovery(\Drupal::root());
   $module_list = $listing->scan('module');
   foreach ($info['dependencies'] as $module) {
+    if (empty($module_list[$module])) assert(FALSE, $module);
     $file = \Drupal::root() . '/' . $module_list[$module]->getPath() . "/$module.install";
     if (is_file($file)) {
       require_once $file;