Adam Bramley
--- a/core/modules/node/src/Controller/NodeController.php
+++ b/core/modules/node/src/Controller/NodeController.php
          ],
        ];
        // @todo Simplify once https://www.drupal.org/node/2334319 lands.
-        $this->renderer->addCacheableDependency($column['data'], $username);
+        $this->renderer->addCacheableDependency($column['data'], CacheableMetadata::createFromRenderArray($username));