Running cron on my own machine I am getting this

Execute scheduled task: Sync registration updates to moodle.net
... started 07:12:37. Current memory use 7.6MB.
Processing new 1.x registration data sync of sites to hub..
Processing new 1.x registration data sync to http://moodle.net for 1 updated/new sites.
using ws-samples curl class (not moodle core's). /home/andrew/Desktop/code/moodle/dev/master

Fatal error: Cannot redeclare class curl_cache in /home/andrew/Desktop/code/moodle/dev/master/local/moodleorg/curlws.php on line 538

Warning: var_export does not handle circular references in /home/andrew/Desktop/code/moodle/dev/master/lib/classes/shutdown_manager.php on line 83

The file curl_cache is in appears to only be included once and by a require_once() at that. However this could be the problem.

./lib/filelib.php:class curl_cache {
./blocks/partners/curl.php:class curl_cache {
./local/moodleorg/curlws.php:class curl_cache {