I opened an issue for dmd but since I get it whith ldc 1.7.0 it might also be highly likely that ldc does something wrong. https://issues.dlang.org/show_bug.cgi?id=18222

Do you think this could be a code generation problem?
The problem is that I can't reproduce the problem on my machines. The error is only reproducible on the build farm I don't have access to.