On Wednesday, 9 January 2019 at 10:29:42 UTC, bauss wrote: > Looking into this it actually looks like an error from DMD. > > Sometime after dmd-2.074.0 it was introduced. > > I would look at the changelog for specifics. If so, then it is almost sure a new regression in 2.084, as Botan builds with 2.083.1.