rust-lang/rust — pull request #15234 by pcwalton (2014-06-28 05:04:57+00:00)
Title: librustc: Remove the fallback to `int` for integers and `f64` for 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]

r? @alexcrichton