Proposal: Extensible exceptions

[Yitzchak Gale]

Ian Lynagh wrote:
>> We can do that, although to actually get people to change I think we'd
>> need a good helping of DEPRECATED pragmas...

Bulat Ziganshin wrote:
> great idea! for even increasing pain, of course

Assuming that the new exceptions will use the same module
name (I know, you don't like that assumption), do you think
that Ian's suggestion makes things worse?

-Yitz