Phobos unittest failure on single-core machines

[dsimcha]

On Friday, 24 August 2012 at 02:16:24 UTC, Ed McCardell wrote:
> When trying to run the phobos unittests on my 32- and 64-bit 
> linux single-processor machines, I get this output:
>
>   Testing generated/linux/debug/64/unittest/std/parallelism
>   totalCPUs = 1
>   core.exception.AssertError at std.parallelism(4082): unittest 
> failure
>
> Has anyone else seen this, or is possible that I have an error 
> in my dmd setup? (I'm using dmd/druntime/phobos from git HEAD, 
> building in what I thought was the normal manner).
>
> --Ed McCardell

This looks to be a bug in a recently-added feature.  I'll look at 
it in detail tonight, but I think I know what the problem is and 
it's pretty easy to fix.  Can you please file a Bugzilla and note 
whether it always occurs or is non-deterministic?