diff -u b/core/includes/module.inc b/core/includes/module.inc
--- b/core/includes/module.inc
+++ b/core/includes/module.inc
@@ -585,7 +585,7 @@
       $parser = new Parser;
       $definitions = $parser->parse(file_get_contents($service_yaml_file));
       if (isset($definitions['services'])) {
-        foreach ($definitions['services'] as $definition) {
+        foreach ($definitions['services'] as $id => $definition) {
           if (isset($definition['tags'])) {
             foreach ($definition['tags'] as $tag) {
               // This works for the default cache registration and even in some
@@ -602,7 +602,7 @@
                   }
                 }
                 catch (Exception $e) {
-                  // This is a best effort removal. At least we tried.
+                  watchdog(WATCHDOG_ERROR, 'Failed to remove cache bin defined by the service %id.', array('%id' => $id));
                 }
               }
             }