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/libsyntax/print/pprust.rs b/src/libsyntax/print/pprust.rs
index 6719f25abb9..a9cf4fbd9f0 100644
--- a/src/libsyntax/print/pprust.rs
+++ b/src/libsyntax/print/pprust.rs
@@ -998,7 +998,7 @@ impl<'a> State<'a> {
 
     pub fn print_outer_attributes(&mut self,
                                   attrs: &[ast::Attribute]) -> IoResult<()> {
-        let mut count = 0;
+        let mut count = 0u;
         for attr in attrs.iter() {
             match attr.node.style {
                 ast::AttrOuter => {
@@ -1016,7 +1016,7 @@ impl<'a> State<'a> {
 
     pub fn print_inner_attributes(&mut self,
                                   attrs: &[ast::Attribute]) -> IoResult<()> {
-        let mut count = 0;
+        let mut count = 0u;
         for attr in attrs.iter() {
             match attr.node.style {
                 ast::AttrInner => {