Making AssertError a singleton

[Dsby via Digitalmars-d]

On Monday, 12 December 2016 at 17:57:13 UTC, Adam D. Ruppe wrote:
> On Monday, 12 December 2016 at 16:35:22 UTC, safety0ff wrote:
>> Wouldn't it break chained assertion errors?
>
> An Error is unrecoverable anyway, if such a case arises it can 
> always just abort the program immediately.

I think all error can be a singleton, and when has the erro, the 
program should be killed.
But Exception should be new , and in GC. we can use the GC.free 
to free the memony.