Fix tests

compiler/rustc_codegen_ssa/src/back/rpath.rs

@@ -24,7 +24,7 @@ pub fn get_rpath_flags(config: &mut RPathConfig<'_>) -> Vec<String> {
 
     debug!("preparing the RPATH!");
 
-    let libs = config.used_crates.clone();
+    let libs = config.used_crates;
     let libs = libs.iter().filter_map(|&(_, ref l)| l.option()).collect::<Vec<_>>();
     let rpaths = get_rpaths(config, &libs);
     let mut flags = rpaths_to_flags(&rpaths);

compiler/rustc_lint/src/noop_method_call.rs

@@ -46,6 +46,14 @@ impl<'tcx> LateLintPass<'tcx> for NoopMethodCall {
             {
                 // Check that we're dealing with a trait method
                 if let Some(trait_id) = cx.tcx.trait_of_item(did) {
+                    // Check we're dealing with one of the traits we care about
+                    if ![sym::Clone, sym::Deref, sym::Borrow]
+                        .iter()
+                        .any(|s| cx.tcx.is_diagnostic_item(*s, trait_id))
+                    {
+                        return;
+                    }
+
                     let substs = cx.typeck_results().node_substs(expr.hir_id);
                     // We can't resolve on types that recursively require monomorphization,
                     // so check that we don't need to perfom substitution
@@ -54,7 +62,6 @@ impl<'tcx> LateLintPass<'tcx> for NoopMethodCall {
                         // Resolve the trait method instance
                         if let Ok(Some(i)) = ty::Instance::resolve(cx.tcx, param_env, did, substs) {
                             // Check that it implements the noop diagnostic
-                            tracing::debug!("Resolves to: {:?}", i.def_id());
                             if [
                                 sym::noop_method_borrow,
                                 sym::noop_method_clone,

compiler/rustc_middle/src/ty/error.rs

@@ -12,7 +12,6 @@ use rustc_target::spec::abi;
 
 use std::borrow::Cow;
 use std::fmt;
-use std::ops::Deref;
 
 #[derive(Clone, Copy, Debug, PartialEq, Eq, TypeFoldable)]
 pub struct ExpectedFound<T> {
@@ -548,7 +547,6 @@ impl<T> Trait<T> for X {
             TargetFeatureCast(def_id) => {
                 let attrs = self.get_attrs(*def_id);
                 let target_spans = attrs
-                    .deref()
                     .iter()
                     .filter(|attr| attr.has_name(sym::target_feature))
                     .map(|attr| attr.span);

compiler/rustc_mir/src/borrow_check/invalidation.rs

@@ -165,7 +165,7 @@ impl<'cx, 'tcx> Visitor<'tcx> for InvalidationGenerator<'cx, 'tcx> {
                 self.consume_operand(location, value);
 
                 // Invalidate all borrows of local places
-                let borrow_set = self.borrow_set.clone();
+                let borrow_set = self.borrow_set;
                 let resume = self.location_table.start_index(resume.start_location());
                 for (i, data) in borrow_set.iter_enumerated() {
                     if borrow_of_local_data(data.borrowed_place) {
@@ -177,7 +177,7 @@ impl<'cx, 'tcx> Visitor<'tcx> for InvalidationGenerator<'cx, 'tcx> {
             }
             TerminatorKind::Resume | TerminatorKind::Return | TerminatorKind::GeneratorDrop => {
                 // Invalidate all borrows of local places
-                let borrow_set = self.borrow_set.clone();
+                let borrow_set = self.borrow_set;
                 let start = self.location_table.start_index(location);
                 for (i, data) in borrow_set.iter_enumerated() {
                     if borrow_of_local_data(data.borrowed_place) {
@@ -369,15 +369,15 @@ impl<'cx, 'tcx> InvalidationGenerator<'cx, 'tcx> {
         );
         let tcx = self.tcx;
         let body = self.body;
-        let borrow_set = self.borrow_set.clone();
+        let borrow_set = self.borrow_set;
         let indices = self.borrow_set.indices();
         each_borrow_involving_path(
             self,
             tcx,
             body,
             location,
             (sd, place),
-            &borrow_set.clone(),
+            borrow_set,
             indices,
             |this, borrow_index, borrow| {
                 match (rw, borrow.kind) {

compiler/rustc_mir_build/src/build/matches/test.rs

@@ -51,7 +51,7 @@ impl<'a, 'tcx> Builder<'a, 'tcx> {
 
             PatKind::Constant { value } => Test {
                 span: match_pair.pattern.span,
-                kind: TestKind::Eq { value, ty: match_pair.pattern.ty.clone() },
+                kind: TestKind::Eq { value, ty: match_pair.pattern.ty },
             },
 
             PatKind::Range(range) => {

compiler/rustc_span/src/symbol.rs

@@ -129,6 +129,7 @@ symbols! {
         BTreeMap,
         BTreeSet,
         BinaryHeap,
+        Borrow,
         C,
         CString,
         Center,
@@ -141,6 +142,7 @@ symbols! {
         Decodable,
         Decoder,
         Default,
+        Deref,
         Encodable,
         Encoder,
         Eq,

compiler/rustc_trait_selection/src/traits/error_reporting/mod.rs

@@ -819,7 +819,7 @@ impl<'a, 'tcx> InferCtxtExt<'tcx> for InferCtxt<'a, 'tcx> {
                 sig.decl
                     .inputs
                     .iter()
-                    .map(|arg| match arg.clone().kind {
+                    .map(|arg| match arg.kind {
                         hir::TyKind::Tup(ref tys) => ArgKind::Tuple(
                             Some(arg.span),
                             vec![("_".to_owned(), "_".to_owned()); tys.len()],

compiler/rustc_traits/src/chalk/mod.rs

@@ -165,7 +165,7 @@ crate fn evaluate_goal<'tcx>(
                         // let's just ignore that
                         let sol = Canonical {
                             max_universe: ty::UniverseIndex::from_usize(0),
-                            variables: obligation.variables.clone(),
+                            variables: obligation.variables,
                             value: QueryResponse {
                                 var_values: CanonicalVarValues { var_values: IndexVec::new() }
                                     .make_identity(tcx),

compiler/rustc_typeck/src/check/callee.rs

@@ -465,7 +465,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
         let expected_arg_tys = self.expected_inputs_for_expected_output(
             call_expr.span,
             expected,
-            fn_sig.output().clone(),
+            fn_sig.output(),
             fn_sig.inputs(),
         );
 

compiler/rustc_typeck/src/check/expr.rs

@@ -711,7 +711,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
         });
 
         let ret_ty = ret_coercion.borrow().expected_ty();
-        let return_expr_ty = self.check_expr_with_hint(return_expr, ret_ty.clone());
+        let return_expr_ty = self.check_expr_with_hint(return_expr, ret_ty);
         ret_coercion.borrow_mut().coerce(
             self,
             &self.cause(return_expr.span, ObligationCauseCode::ReturnValue(return_expr.hir_id)),

library/core/src/borrow.rs

@@ -153,6 +153,7 @@
 /// [`HashMap<K, V>`]: ../../std/collections/struct.HashMap.html
 /// [`String`]: ../../std/string/struct.String.html
 #[stable(feature = "rust1", since = "1.0.0")]
+#[rustc_diagnostic_item = "Borrow"]
 pub trait Borrow<Borrowed: ?Sized> {
     /// Immutably borrows from an owned value.
     ///

library/core/src/clone.rs

@@ -104,6 +104,7 @@
 /// [impls]: #implementors
 #[stable(feature = "rust1", since = "1.0.0")]
 #[lang = "clone"]
+#[rustc_diagnostic_item = "Clone"]
 pub trait Clone: Sized {
     /// Returns a copy of the value.
     ///

library/core/src/ops/deref.rs

@@ -60,6 +60,7 @@
 #[doc(alias = "*")]
 #[doc(alias = "&*")]
 #[stable(feature = "rust1", since = "1.0.0")]
+#[rustc_diagnostic_item = "Deref"]
 pub trait Deref {
     /// The resulting type after dereferencing.
     #[stable(feature = "rust1", since = "1.0.0")]

src/test/ui/issues/issue-11820.rs

@@ -1,12 +1,14 @@
 // run-pass
 // pretty-expanded FIXME #23616
 
+#![allow(noop_method_call)]
+
 struct NoClone;
 
 fn main() {
-  let rnc = &NoClone;
-  let rsnc = &Some(NoClone);
+    let rnc = &NoClone;
+    let rsnc = &Some(NoClone);
 
-  let _: &NoClone = rnc.clone();
-  let _: &Option<NoClone> = rsnc.clone();
+    let _: &NoClone = rnc.clone();
+    let _: &Option<NoClone> = rsnc.clone();
 }

src/test/ui/underscore-imports/cycle.rs

@@ -14,5 +14,6 @@ mod y {
 
 pub fn main() {
     use x::*;
+    #[allow(noop_method_call)]
     (&0).deref();
 }

src/test/ui/underscore-imports/hygiene-2.rs

@@ -29,5 +29,6 @@ m!(y);
 
 fn main() {
     use crate::y::*;
+    #[allow(noop_method_call)]
     (&()).deref();
 }

src/test/ui/underscore-imports/macro-expanded.rs

@@ -3,6 +3,7 @@
 // check-pass
 
 #![feature(decl_macro, rustc_attrs)]
+#![allow(noop_method_call)]
 
 mod x {
     pub use std::ops::Not as _;