Making AssertError a singleton

[Guillaume Piolat via Digitalmars-d]

On Monday, 12 December 2016 at 21:02:11 UTC, Andrei Alexandrescu 
wrote:
>
> That will come too.
>
>
> Andrei

Great teaser :)

For reference, here is how I currently do this:

- make Object.~this() @nogc with a cast
- throw emplaced exceptions in malloc'd memory
- release them explicitely at catch time

This probably breaks chaining so maybe RC objects are needed 
first, dunno.