By: Tom Sydney Kerckhove <syd@cs-syd.eu>
Run the asynchronous-runner regression tests sequentially Each test tears a nested runner down mid-flight, cancelling its worker, printer and scheduler threads. Running that alongside the rest of the suite made the suite abort with 'free(): invalid pointer' under load: with the fix but without these tests the suite survived 3 load rounds, and with them it died in 1 of 2.