Add Sync bound to ScopedKey (fixes #25894)

Manishearth · Manishearth · commit bddced1594d5 · 2015-05-30T13:49:55.000+05:30
diff --git a/src/libstd/thread/scoped_tls.rs b/src/libstd/thread/scoped_tls.rs
@@ -221,7 +221,7 @@ mod imp {
         pub marker: marker::PhantomData<Cell<T>>,
     }
 
-    unsafe impl<T> marker::Sync for KeyInner<T> { }
+    unsafe impl<T: marker::Sync> marker::Sync for KeyInner<T> { }
 
     impl<T> KeyInner<T> {
         pub const fn new() -> KeyInner<T> {

Original file line number	Diff line number	Diff line change
`@@ -221,7 +221,7 @@ mod imp {`
`221`	`221`	`pub marker: marker::PhantomData<Cell<T>>,`
`222`	`222`	`}`
`223`	`223`
`224`		`- unsafe impl<T> marker::Sync for KeyInner<T> { }`
	`224`	`+ unsafe impl<T: marker::Sync> marker::Sync for KeyInner<T> { }`
`225`	`225`
`226`	`226`	`impl<T> KeyInner<T> {`
`227`	`227`	`pub const fn new() -> KeyInner<T> {`