Section availability cache not set on initial course creation

Seems we haven't caught them

Notice: Undefined property: stdClass::$availableinfo in /Users/danp/git/moodle/course/format/renderer.php on line 294 Call Stack: 0.0025 777720 1.

() /Users/danp/git/moodle/course/view.php:0 0.9525 66767208 2. require('/Users/danp/git/moodle/course/format/weeks/format.php') /Users/danp/git/moodle/course/view.php:245 0.9548 67077768 3. format_section_renderer_base->print_multiple_section_page() /Users/danp/git/moodle/course/format/weeks/format.php:45 1.0567 74009296 4. format_section_renderer_base->section_header() /Users/danp/git/moodle/course/format/renderer.php:575 1.0601 74018880 5. format_section_renderer_base->section_availability_message() /Users/danp/git/moodle/course/format/renderer.php:165

Replication steps:

1. Create a new course
2. Visit course page

On initial visit there are warnings about missing availableinfo