floating point numbers for real.
This will break code that looks like:
let mut x = 0;
while ... {
x += 1;
}
println!("{}", x);
Change that code to:
let mut x = 0i;
while ... {
x += 1;
}
println!("{}", x);
Closes#15201.
[breaking-change]
When re-exporting a trait/structure/enum, then we need to propagate the
reachability of the type through the methods that are defined on it.
Closes#9906Closes#9968
