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/compile-fail/for-loop-refutable-pattern-error-message.rs b/src/test/compile-fail/for-loop-refutable-pattern-error-message.rs
index 8b00b614909..8de613ac03d 100644
--- a/src/test/compile-fail/for-loop-refutable-pattern-error-message.rs
+++ b/src/test/compile-fail/for-loop-refutable-pattern-error-message.rs
@@ -11,6 +11,6 @@
 
 fn main() {
     for
-        &1 //~ ERROR refutable pattern in `for` loop binding
-        in [1].iter() {}
+        &1i //~ ERROR refutable pattern in `for` loop binding
+        in [1i].iter() {}
 }