Mark the type hint as nullable

dtdesign · dtdesign · commit b47b1201afd1 · 2025-11-03T13:11:14.000+01:00
diff --git a/wcfsetup/install.php b/wcfsetup/install.php
@@ -553,7 +553,7 @@ class SystemException extends \Exception
 	 * @param	string		$description	description of the error
 	 * @param	\Exception	$previous	repacked Exception
 	 */
-	public function __construct($message = '', $code = 0, $description = '', \Exception $previous = null)
+	public function __construct($message = '', $code = 0, $description = '', ?\Exception $previous = null)
 	{
 		parent::__construct((string) $message, (int) $code, $previous);
 		$this->description = $description;

Original file line number	Diff line number	Diff line change
`@@ -553,7 +553,7 @@ class SystemException extends \Exception`
`553`	`553`	`* @param string $description description of the error`
`554`	`554`	`* @param \Exception $previous repacked Exception`
`555`	`555`	`*/`
`556`		`- public function __construct($message = '', $code = 0, $description = '', \Exception $previous = null)`
	`556`	`+ public function __construct($message = '', $code = 0, $description = '', ?\Exception $previous = null)`
`557`	`557`	`{`
`558`	`558`	`parent::__construct((string) $message, (int) $code, $previous);`
`559`	`559`	`$this->description = $description;`