Rustup to rustc 1.38.0-nightly (4560cb830 2019-07-28)

example/mini_core_hello_world.rs

@@ -216,7 +216,7 @@ fn main() {
     let x = &[0u32, 42u32] as &[u32];
     match x {
         [] => assert_eq!(0u32, 1),
-        [_, ref y..] => assert_eq!(&x[1] as *const u32 as usize, &y[0] as *const u32 as usize),
+        [_, ref y @ ..] => assert_eq!(&x[1] as *const u32 as usize, &y[0] as *const u32 as usize),
     }
 
     assert_eq!(((|()| 42u8) as fn(()) -> u8)(()), 42);