Cleanup

Author: mcarton

src/derive.rs

@@ -71,12 +71,9 @@ impl LintPass for Derive {
 
 impl LateLintPass for Derive {
     fn check_item(&mut self, cx: &LateContext, item: &Item) {
-        
-
         if_let_chain! {[
             let ItemImpl(_, _, _, Some(ref trait_ref), _, _) = item.node
         ], {
-
             let ty = cx.tcx.lookup_item_type(cx.tcx.map.local_def_id(item.id)).ty;
             if item.attrs.iter().any(is_automatically_derived) {
                 check_hash_peq(cx, item.span, trait_ref, ty);

tests/compile-fail/derive.rs

@@ -35,6 +35,17 @@ impl Clone for Qux {
     fn clone(&self) -> Self { Qux }
 }
 
+// See #666
+#[derive(Copy)]
+struct Lt<'a> {
+    a: &'a u8,
+}
+
+impl<'a> Clone for Lt<'a> {
+//~^ ERROR you are implementing `Clone` explicitly on a `Copy` type
+    fn clone(&self) -> Self { unimplemented!() }
+}
+
 // Ok, `Clone` cannot be derived because of the big array
 #[derive(Copy)]
 struct BigArray {