https://issues.dlang.org/show_bug.cgi?id=15939
--- Comment #7 from Aleksei Preobrazhenskii <apreobrazhen...@gmail.com> --- I was running tests for past five days, I didn't see any deadlocks since I switched GC to using real-time POSIX signals (thread_setGCSignals(SIGRTMIN, SIGRTMIN + 1)). I would recommend to change default signals accordingly. --