pointer cast from const(Y) to immutable(void*)** is not supported at compile time

[kinke]

On Thursday, 2 August 2018 at 02:13:41 UTC, Hakan Aras wrote:
> I do want it at compiletime though.

Totally understandable; that's a regression and needs to be 
fixed. See 
https://github.com/dlang/dmd/pull/8362#pullrequestreview-142565787.