Auto merge of #36395 - durka:rangeinclusive-no-esi, r=alexcrichton

remove ExactSizeIterator from RangeInclusive<{u,i}{32,size}>

Fixes #36386.

This is a [breaking-change] for nightly users of `#![feature(inclusive_range_syntax)]` and/or `#![feature(inclusive_range)]`.

Author: bors

src/libcore/iter/range.rs

@@ -466,7 +466,11 @@ macro_rules! range_exact_iter_impl {
     ($($t:ty)*) => ($(
         #[stable(feature = "rust1", since = "1.0.0")]
         impl ExactSizeIterator for ops::Range<$t> { }
+    )*)
+}
 
+macro_rules! range_incl_exact_iter_impl {
+    ($($t:ty)*) => ($(
         #[unstable(feature = "inclusive_range",
                    reason = "recently added, follows RFC",
                    issue = "28237")]
@@ -500,9 +504,12 @@ impl<A: Step> Iterator for ops::Range<A> where
     }
 }
 
-// Ranges of u64 and i64 are excluded because they cannot guarantee having
-// a length <= usize::MAX, which is required by ExactSizeIterator.
+// These macros generate `ExactSizeIterator` impls for various range types.
+// Range<{u,i}64> and RangeInclusive<{u,i}{32,64,size}> are excluded
+// because they cannot guarantee having a length <= usize::MAX, which is
+// required by ExactSizeIterator.
 range_exact_iter_impl!(usize u8 u16 u32 isize i8 i16 i32);
+range_incl_exact_iter_impl!(u8 u16 i8 i16);
 
 #[stable(feature = "rust1", since = "1.0.0")]
 impl<A: Step + Clone> DoubleEndedIterator for ops::Range<A> where

src/test/run-pass/range_inclusive.rs

@@ -75,7 +75,7 @@ pub fn main() {
 
     // test the size hints and emptying
     let mut long = 0...255u8;
-    let mut short = 42...42;
+    let mut short = 42...42u8;
     assert_eq!(long.size_hint(), (256, Some(256)));
     assert_eq!(short.size_hint(), (1, Some(1)));
     long.next();