- It's not at all safe. And I do not at all care - table iterators are inefficient and terrible, and there's nothing we can do to make this situation even remotely better.
- This is going to start the mark of v4
- pairs() implemented on tables for pairs-like iteration
- .error_handler variable is now hidden from view on protected function! Use set_error_handler/get_error_handler
- packaged_coroutine skeleton, but code is blacked out
- tests rearranged a little bit
- auxiliary keys lookup, search, and storage improved
- overhead of stored tables improved
- usertype registration and un-registration improved
