MDL-81919 core: Update moved file namespaces

lib/classes/exception/invalid_state_exception.php

@@ -14,6 +14,8 @@
 // You should have received a copy of the GNU General Public License
 // along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
 
+namespace core\exception;
+
 /**
  * An exception that indicates something really weird happened. For example,
  * if you do switch ($context->contextlevel), and have one case for each
@@ -22,7 +24,7 @@
  * $context->contextlevel is invalid - rather than ignoring this possibility.
  *
  * @package    core
- * @subpackage lib
+ * @subpackage exception
  * @copyright  2009 onwards Martin Dougiamas  {@link http://moodle.com}
  * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  */
@@ -37,3 +39,8 @@ class invalid_state_exception extends moodle_exception {
         parent::__construct('invalidstatedetected', 'debug', '', $hint, $debuginfo);
     }
 }
+
+// Alias this class to the old name.
+// This file will be autoloaded by the legacyclasses autoload system.
+// In future all uses of this class will be corrected and the legacy references will be removed.
+class_alias(invalid_state_exception::class, \invalid_state_exception::class);