std.utf.decode @nogc please

[Andrei Alexandrescu via Digitalmars-d]

On 10/3/14, 11:35 AM, Dmitry Olshansky wrote:
> 01-Oct-2014 14:10, Robert burner Schadek пишет:
>> lately when working on std.string I run into problems making stuff nogc
>> as std.utf.decode is not nogc.
>>
>> https://issues.dlang.org/show_bug.cgi?id=13458
>
> Trivial to do. But before that somebody got to make  one of:
>
> a) A policy on reuse of exceptions. Literally we have easy TLS why not
> put 1 copy of each possible exception there? (**ck the chaining, who
> need it anyway?)
> b) Make all exceptions ref-counted.
>
> The benefit of A is that "creating" exceptions becomes MUCH faster.

This seems to be going in circles. Didn't we just agree we solve this by 
making exceptions reference counted? Please advise. -- Andrei