a.rb

diff --git a/core/lib/Drupal/Core/Extension/ModuleHandler.php b/core/lib/Drupal/Core/Extension/ModuleHandler.php
index 001e278..a795e0e 100644
--- a/core/lib/Drupal/Core/Extension/ModuleHandler.php
+++ b/core/lib/Drupal/Core/Extension/ModuleHandler.php
@@ -759,6 +759,9 @@ public function uninstall(array $module_list, $uninstall_dependents = TRUE) {
       watchdog('system', '%module module uninstalled.', array('%module' => $module), WATCHDOG_INFO);
 
       $schema_store->delete($module);
+
+      // Make sure any route data is also removed for this module.
+      \Drupal::service('router.dumper')->dump(array('provider' => $module));
     }
     drupal_get_installed_schema_version(NULL, TRUE);