Ticket #16030: 16030.diff

wp-admin/includes/post.php

@@ -715 +715 @@
         $mid = (int) $mid;
 
         $meta = $wpdb->get_row( $wpdb->prepare("SELECT * FROM $wpdb->postmeta WHERE meta_id = %d", $mid) );
-        if ( is_serialized_string( $meta->meta_value ) )
+        if ( $meta && is_serialized_string( $meta->meta_value ) )
                 $meta->meta_value = maybe_unserialize( $meta->meta_value );
         return $meta;
 }