Thoughts on some code breakage with 2.074

[David Eckardt via Digitalmars-d]

On Tuesday, 9 May 2017 at 12:13:34 UTC, Adam Wilson wrote:
> Can we PLEASE get more of this? I'm not saying up-end the 
> language, but let's solve some problems. I doubt our corporate 
> users will be very angry. I suspect that most reactions will 
> fall between "minor irritation" and this one.
>
> /me looks sideways at shared

Here is more of this. Writing industry D code I *love* breaking 
changes that reveal bugs in the code base.
A while ago I suggested changing cast(bool) semantics of 
floating-point types so that assert(x) fails if x is NaN 
(https://issues.dlang.org/show_bug.cgi?id=13489). It was rejected 
because it could break existing code and surprise C/C++ 
programmers (although the point of NaN is to surprise you IMHO).
I wonder what the ratio of valid to buggy code is that would 
break with this change. At least I enjoy it if my buggy code 
breaks.