Strange Segfault using XCB bindings from dsource

[Mpnordladn]

Hey all,
I'm poking around D, trying to see if it will be worth my while 
to learn it.
I've used XCB in C++ and Python before, and I was delighted to 
see that D has an XCB
binding as well. The problem, however, is in the example program, 
there is a segfault.
Here's the program:
http://pastebin.com/gKwxrNFx
It segfaults at around line 31 consistently.