bug #3137351 User preferences and hide_db

libraries/config/validate.lib.php

@@ -307,7 +307,9 @@ function validate_regex($path, $values)
     test_php_errormsg();
 
     $matches = array();
-    preg_match($values[$path], '', $matches);
+    // in libraries/List_Database.class.php _checkHideDatabase(),
+    // a '/' is used as the delimiter for hide_db
+    preg_match('/' . $values[$path] . '/', '', $matches);
 
     test_php_errormsg(false);
 
@@ -457,4 +459,4 @@ function validate_upper_bound($path, $values, $max_value)
     $result = $values[$path] <= $max_value;
     return array($path => ($result ? '' : sprintf(__('Value must be equal or lower than %s'), $max_value)));
 }
-?>
+?>