szurubooru/src/Views/post-view.phtml

<?php if (!empty($this->context->transport->errorMessage)): ?>
	<p class="alert alert-error"><?php echo $this->context->transport->errorMessage ?></p>
<?php else: ?>
	<img src="<?php echo \Chibi\UrlHelper::route('post', 'retrieve', ['name' => $this->context->transport->post->name]) ?>" alt="<?php echo $this->context->transport->post->name ?>"/>
<?php endif ?>