[dmd-concurrency] Smoke test

[Sean Kelly]

On Jan 7, 2010, at 1:18 PM, Michel Fortin wrote:
> 
> I'm not against promoting memory blocks to the shared GC, but I'd like this to be just a feature of the GC in the runtime, not a requirement for the concurrency model to make sense. In a way, it shouldn't be done implicitly.

That's a good point.  And it's certainly what I was going for until this shared reference issue threw a wrench in the works and I panicked :-).  I agree that this should be a part of the rule because I'd consider the model broken otherwise.