https://issues.dlang.org/show_bug.cgi?id=4890
--- Comment #20 from Sean Kelly <s...@invisibleduck.org> --- It should. Not doing so seems pretty broken. But it this particular kernel it seems like maybe signals are ignored in this situation. What's happening specifically is that the one thread is blocked on the mutex protecting the GC, and another thread holds that lock and is attempting a collection. I could change this code to use a spin lock instead, but the same problem could crop up with any mutex if I understand the problem correctly. I'm kind of curious to see whether the Boehm GC deadlocks in a similar situation with this kernel. It should, since last time I checked it coordinated collections the exact same way on Linux. --