#524664 by codecowboy and mfb: drupal_error_handler() does not support PHP 5.3.0 error constants.

includes/common.inc

@@ -1067,6 +1067,11 @@ function _drupal_error_handler($error_level, $message, $filename, $line, $contex
       E_STRICT => 'Strict warning',
       E_RECOVERABLE_ERROR => 'Recoverable fatal error'
     );
+    // E_DEPRECATED and E_USER_DEPRECATED were added in PHP 5.3.0.
+    if (defined('E_DEPRECATED')) {
+      $types[E_DEPRECATED] = 'Deprecated function';
+      $types[E_USER_DEPRECATED] = 'User deprecated function';
+    }
     $caller = _drupal_get_last_caller(debug_backtrace());
 
     // We treat recoverable errors as fatal.