Mentioned in [52176] on Core SVN:
WPDB: Capture error in `wpdb::$last_error` when insert fails instead of silently failing for invalid data or value too long.

Mentioned in [38806] on Core SVN:
REST API: Include `Vary: Origin` in cors headers

Mentioned in [38787] on Core SVN:
Users: Use the role name instead of the role display name when fetching the list of users with no role.

Mentioned in [38774] on Core SVN:
TinyMCE: add support for custom dashicon for wp.mce.View.setLoader().