RFC: reference counted Throwable

[Vladimir Panteleev via Digitalmars-d]

On Saturday, 20 September 2014 at 01:19:05 UTC, Walter Bright 
wrote:
> Having a compiler switch to change the behavior of every module 
> in incompatible ways would be a disastrous balkanization.

Don't -version, -debug etc. have this problem anyway?

Anyway, if you change the name mangling, then you'll get link 
errors instead of mysterious crashes.

> It has to be done in such a way that the ARC and the existing 
> exceptions can coexist.

How?