While performing MDLQA-5396 and exporting to Flickr I encountered the following.

Notice: Trying to get property of non-object in /home/andrew/Desktop/code/moodle/int/master/repository/repository_callback.php on line 51
Call Stack

1. Time Memory Function Location
   1 0.0195 244176
   Unknown macro: {main}

   ( ) ../repository_callback.php:0

   ( ! ) Fatal error: Class 'repository_' not found in /home/andrew/Desktop/code/moodle/int/master/repository/repository_callback.php on line 56
   Call Stack

   1. Time Memory Function Location
      1 0.0195 244176

   ( ) ../repository_callback.php:0