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]

1 files changed, 2 insertions, 2 deletions

diff --git a/src/test/debuginfo/managed-pointer-within-unique.rs b/src/test/debuginfo/managed-pointer-within-unique.rs
index b56db2d1846..cc18ea64f38 100644
--- a/src/test/debuginfo/managed-pointer-within-unique.rs
+++ b/src/test/debuginfo/managed-pointer-within-unique.rs
@@ -37,9 +37,9 @@ struct ContainsManaged {
 }
 
 fn main() {
-    let ordinary_unique = box() (-1, -2);
+    let ordinary_unique = box() (-1i, -2i);
 
-    let managed_within_unique = box ContainsManaged { x: -3, y: box(GC) -4 };
+    let managed_within_unique = box ContainsManaged { x: -3, y: box(GC) -4i };
 
     zzz();
 }