add #[rustc_pass_by_value] to more types

Author: lcnr

clippy_lints/src/redundant_clone.rs

@@ -543,10 +543,10 @@ impl<'a, 'tcx> PossibleBorrowerVisitor<'a, 'tcx> {
                 continue;
             }
 
-            let borrowers = self.possible_borrower.reachable_from(&row);
+            let borrowers = self.possible_borrower.reachable_from(row);
             if !borrowers.is_empty() {
                 let mut bs = HybridBitSet::new_empty(self.body.local_decls.len());
-                for &c in borrowers {
+                for c in borrowers {
                     if c != mir::Local::from_usize(0) {
                         bs.insert(c);
                     }
@@ -663,10 +663,10 @@ impl<'a, 'tcx> PossibleOriginVisitor<'a, 'tcx> {
                 continue;
             }
 
-            let borrowers = self.possible_origin.reachable_from(&row);
+            let borrowers = self.possible_origin.reachable_from(row);
             if !borrowers.is_empty() {
                 let mut bs = HybridBitSet::new_empty(self.body.local_decls.len());
-                for &c in borrowers {
+                for c in borrowers {
                     if c != mir::Local::from_usize(0) {
                         bs.insert(c);
                     }

clippy_utils/src/lib.rs

@@ -489,7 +489,8 @@ pub fn def_path_res(cx: &LateContext<'_>, path: &[&str]) -> Res {
     fn find_crate(tcx: TyCtxt<'_>, name: &str) -> Option<DefId> {
         tcx.crates(())
             .iter()
-            .find(|&&num| tcx.crate_name(num).as_str() == name)
+            .copied()
+            .find(|&num| tcx.crate_name(num).as_str() == name)
             .map(CrateNum::as_def_id)
     }