Segfault in DMD OSX

[Etienne via Digitalmars-d-learn]

I'm having issues with DMD returning exit code -11 rather than compiling 
my project. I have no idea how to debug this, I'm using Mac OS X 10.9.4 
with latest git DMD tagged 2.066, and this project:

https://github.com/etcimon/event.d

When I hit `dub run`, I get the exit code. Not sure why or where the 
problem comes from, I can't get GDB to run on the mac (something about 
Mach task port error in gdb), and dmd DEBUG gives no additional info. 
Any ideas?