casting away const and then mutating

[Timon Gehr via Digitalmars-d]

On 07/24/2015 10:08 PM, Steven Schveighoffer wrote:
>
> We can start with "casting away const and mutating, even if you know the
> underlying data is mutable, is UB, except for these situations:..."
>
> And relax from there.

But what is the point?