I have built Debian packages for a git snapshot (git commit 4df52916170bb81179697d0fa78c7d81fd95415f )
This version of Doxygen no longer crashes while building the ACE documentation. It might be worth packaging a snapshot, or trying to isolate the patch(es) that solve the issue. -- Pau Garcia i Quiles http://www.elpauer.org (Due to my workload, I may need 10 days to answer)