diff --git a/core/lib/Drupal/Core/Database/Query/Condition.php b/core/lib/Drupal/Core/Database/Query/Condition.php
index 0beb716..2b9574e 100644
--- a/core/lib/Drupal/Core/Database/Query/Condition.php
+++ b/core/lib/Drupal/Core/Database/Query/Condition.php
@@ -198,6 +198,12 @@ public function compile(Connection $connection, PlaceholderInterface $queryPlace
               // Provide a string which will result into an empty query result.
               $this->stringVersion = '( AND 1 = 0 )';
 
+              // Conceptually throwing an exception caused by user input is bad
+              // as you result into a WSOD, which depending on your webserver
+              // configuration can result into the assumption that your site is
+              // broken.
+              // On top of that the database API relies on __toString() which
+              // does not allow to throw exceptions.
               trigger_error('Invalid characters in query operator: ' . $condition['operator'], E_USER_ERROR);
               return;
             }