Rollup merge of rust-lang#50883 - dlrobertson:fix_warning, r=TimNN

kennytm · kennytm · commit 9f34c7feea4b · 2018-05-20T04:16:11.000+08:00
Fix warning when building stage0 libcore

When building stage0 a warning will be triggered when compiling libcore
due to `align_to_offsets` not being used.
diff --git a/src/libcore/slice/mod.rs b/src/libcore/slice/mod.rs
@@ -1698,6 +1698,7 @@ impl<T> [T] {
     }
 
     /// Function to calculate lenghts of the middle and trailing slice for `align_to{,_mut}`.
+    #[cfg(not(stage0))]
     fn align_to_offsets<U>(&self) -> (usize, usize) {
         // What we gonna do about `rest` is figure out what multiple of `U`s we can put in a
         // lowest number of `T`s. And how many `T`s we need for each such "multiple".

Original file line number	Diff line number	Diff line change
`@@ -1698,6 +1698,7 @@ impl<T> [T] {`
`1698`	`1698`	`}`
`1699`	`1699`
`1700`	`1700`	/// Function to calculate lenghts of the middle and trailing slice for `align_to{,_mut}`.
	`1701`	`+ #[cfg(not(stage0))]`
`1701`	`1702`	`fn align_to_offsets<U>(&self) -> (usize, usize) {`
`1702`	`1703`	// What we gonna do about `rest` is figure out what multiple of `U`s we can put in a
`1703`	`1704`	// lowest number of `T`s. And how many `T`s we need for each such "multiple".