dmd git head completely broken on ubuntu (but not osx)

[Brad Roberts]

On 12/5/13 11:17 AM, Timothee Cour wrote:
> https://d.puremagic.com/issues/show_bug.cgi?id=11684 is a pretty serious regression:
> when building dmd/druntime/phobos from source, any call to writeln will result in segfault on ubuntu
> (but on osx I don't have this problem)
>
> with git checkout 2.064 instead of git checkout master, things work.
>
>

One of the linux auto-tester nodes is ubuntu and it's not showing the problems.  That pretty 
strongly indicates it's not a generic everything is broken sort of problem.