Decouple trait impls of different traits wrt incremental

Author: oli-obk

clippy_lints/src/derive.rs

@@ -324,11 +324,9 @@ fn check_copy_clone<'tcx>(cx: &LateContext<'tcx>, item: &Item<'_>, trait_ref: &h
     // there's a Copy impl for any instance of the adt.
     if !is_copy(cx, ty) {
         if ty_subs.non_erasable_generics().next().is_some() {
-            let has_copy_impl = cx.tcx.all_local_trait_impls(()).get(&copy_id).is_some_and(|impls| {
-                impls.iter().any(|&id| {
-                    matches!(cx.tcx.type_of(id).instantiate_identity().kind(), ty::Adt(adt, _)
+            let has_copy_impl = cx.tcx.local_trait_impls(copy_id).iter().any(|&id| {
+                matches!(cx.tcx.type_of(id).instantiate_identity().kind(), ty::Adt(adt, _)
                                         if ty_adt.did() == adt.did())
-                })
             });
             if !has_copy_impl {
                 return;