In some situations, you can get:
InvalidArgumentException: The timestamp must be numeric. in Drupal\Component\Datetime\DateTimePlus::createFromTimestamp() (line 201 of core/lib/Drupa
Drupal\quant\Utility::getPageInfo() (Line: 440)
quant_preprocess_page(Array, 'page', Array)
call_user_func_array('quant_preprocess_page', Array) (Line: 285)
Drupal\Core\Theme\ThemeManager->render('page', Array) (Line: 433)
Drupal\Core\Render\Renderer->doRender(Array, ) (Line: 204)
Drupal\Core\Render\Renderer->render(Array) (Line: 477)
Drupal\Core\Template\TwigExtension->escapeFilter(Object, Array, 'html', NULL, 1) (Line: 86)
__TwigTemplate_c3de7236844b3caf8ae2d932e5d50dd4->doDisplay(Array, Array) (Line: 394)
Twig\Template->displayWithErrorHandling(Array, Array) (Line: 367)
...
In my case, I was switching a translated term without aliases back and forth between published and unpublished. But, this may be hard to reproduce.
Defensively check for null timestamps before calling DrupalDateTime::createFromTimestamp.
No fatal error.
Fixed
1.0
Code
Fix is here: https://github.com/quantcdn/drupal/pull/213
Merged in GitHub. This will be synced to d.o repo and in the next release.