From df255d3d5d174190db36087c1514865773474996 Mon Sep 17 00:00:00 2001
From: Isaac Connor <iconnor@pseudo.connortechnology.com>
Date: Tue, 4 Oct 2016 14:07:11 -0400
Subject: [PATCH] check for existence of attribute before calling it to break
 gently

---
 onvif/modules/lib/ONVIF/Deserializer/MessageParser.pm | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/onvif/modules/lib/ONVIF/Deserializer/MessageParser.pm b/onvif/modules/lib/ONVIF/Deserializer/MessageParser.pm
index b0ce6f0fd..0e4b6dcfb 100644
--- a/onvif/modules/lib/ONVIF/Deserializer/MessageParser.pm
+++ b/onvif/modules/lib/ONVIF/Deserializer/MessageParser.pm
@@ -272,7 +272,11 @@ sub _initialize {
             #
             $_method =~s{\.}{__}xg;
             $_method =~s{\-}{_}xg;
-            $list->[-1]->$_method( $current );
+            if ( $list->[-1]->can( $_method ) ) {
+              $list->[-1]->$_method( $current );
+            } else {
+              print ( "ERror " . $list->[-1] . " cannot $_method\n" );
+            }
 
             $current = pop @$list;          # step up in object hierarchy