Notice, Warnings, Catchable fatal error

[betweenbrain]

Just installed in the latest version of the CMS from github. Tried applying a patch and I get:

Notice: Undefined property: stdClass::$diff_url in /administrator/components/com_patchtester/models/pull.php on line 95 Warning: fopen(): Filename cannot be empty in /libraries/joomla/http/transport/stream.php on line 125

Warning: stream_get_meta_data() expects parameter 1 to be resource, boolean given in /libraries/joomla/http/transport/stream.php on line 128
Warning: stream_get_contents() expects parameter 1 to be resource, boolean given in /libraries/joomla/http/transport/stream.php on line 131
Warning: fclose() expects parameter 1 to be resource, boolean given in /libraries/joomla/http/transport/stream.php on line 134

Catchable fatal error: Argument 1 passed to JHttpTransportStream::getResponse() must be an array, null given, called in /libraries/joomla/http/transport/stream.php on line 136 and defined in /libraries/joomla/http/transport/stream.php on line 150