Annoyance with new integer promotion deprecations

[Walter Bright]

On 2/5/2018 1:20 PM, Nick Sabalausky wrote:
> Ouch. I guess "the real WTF" is that 2's complement leads to supporting one 
> value that cannot be negated. But still, I thought we had value range 
> propagation rules to avoid this sort of nonsense when possible (such as the 
> example above)?

The real bug is that VRP should allow this particular case.