https://issues.dlang.org/show_bug.cgi?id=16574
--- Comment #3 from b2.t...@gmx.com --- What happens is that an alias declaration inside a class creates a silent error (this is a second issue). When the alias is put out of the class the "real" error appears before those related to overriding. The project is updated https://github.com/BBasile/kheops/commit/c9522681ee5ffd3d6d4bb298d4a5597bcbb1d510 >From now, to see the regression just clone, "cd kheops" and "dub". --