-preview=in might break code

[Walter Bright]

On 10/3/2020 7:10 AM, Steven Schveighoffer wrote:
> But the problem *IS* that it is *very uncommon* that you will run into issues. 
> An issue that is common is a problem in it's own right. An issue that is subtle 
> and very uncommon (so uncommon that you haven't found a case of it yet) is a 
> different kind of problem. I don't believe that less frequent means we have a 
> better situation, I think it's worse.

This. The rarity (and unpredictability) of it causing a problem is the problem.

When I have a bug in my code, I want it to fail hard as soon, as obviously, and 
as often as possible, so it won't escape into a released product.