I'm going to be bringing up some more testers, and I wondered if the results are meaningful, or can be made meaningful. The tester is "BenPope x86_64 Ubuntu", first available results are for TSAN, and it shows some failures. I'm under the impression that some of the sanitisers may need to be taught about certain constructs in order to be effective (e.g. boost::detail::atomic_increment: http://www.boost.org/development/tests/develop/developer/output/BenPope%20x8...) Other failures look legitimate at first glance (e.g. Cycle in lock order graph: http://www.boost.org/development/tests/develop/developer/output/BenPope%20x8...) I shall endeavour to get nicer stack traces, I think I need to tell it about llvm-symbolizer, althouh I haven't always had success in the past, any advice or suggestions are welcome. Ben