This is true, but for at least some race conditions the rr "chaos mode" can help in tracking them down. Chaos mode basically randomly adjusts its thread schedul

This is true, but for at least some race conditions the rr "chaos mode" can help in tracking them down. Chaos mode basically randomly adjusts its thread scheduling so that it sometimes doesn't run a thread at all for a few seconds, so you run it a bunch of times until it hits the timing window for the race condition; and then when it does you debug the recording. IME it works at least sometimes but it does require that the thing you're testing doesn't take too long to fall over, since you need to do multiple recordings of it. https://robert.ocallahan.org/2016/02/introducing-rr-chaos-mode.html https://robert.ocallahan.org/2016/02/introducing-rr-chaos-mo...