Phobos is now compiled with -preview=dip1000

[Kagamin]

On Thursday, 16 May 2019 at 05:22:42 UTC, Seb wrote:
> Yes that sounds like the culprit. Btw as mentioned on DConf, 
> the dip1000 switch contains a few other breaking changes which 
> will make it even harder to adopt too.

Well, it's an inherent property of DIP1000 to not compile code 
that previously compiled. Though safety of tupleof shouldn't 
depend on DIP1000.