For those ready to take the challenge

[Vladimir Panteleev via Digitalmars-d-learn]

On Saturday, 10 January 2015 at 14:56:09 UTC, Adam D. Ruppe wrote:
> On Saturday, 10 January 2015 at 13:22:57 UTC, Nordlöw wrote:
>> on dmd git master. Ideas anyone?
>
> Don't use git master :P

Do use git master. The more people do, the fewer regressions will 
slip into the final release.

You can use Dustmite to reduce the code to a simple example, and 
Digger to find the exact pull request which introduced the 
regression. (Yes, shameless plug, preaching to the choir, etc.)