4 files changed, 6 insertions, 9 deletions

diff --git a/crates/ra_hir_ty/src/display.rs b/crates/ra_hir_ty/src/display.rs
index 23cea1a2a..ac68c5661 100644
--- a/crates/ra_hir_ty/src/display.rs
+++ b/crates/ra_hir_ty/src/display.rs
@@ -369,7 +369,7 @@ impl HirDisplay for ApplicationTy {
                         let data = (*datas)
                             .as_ref()
                             .map(|rpit| rpit.impl_traits[idx as usize].bounds.clone());
-                        data.clone().subst(&self.parameters)
+                        data.subst(&self.parameters)
                     }
                 };
                 write!(f, "impl ")?;
@@ -456,7 +456,7 @@ impl HirDisplay for Ty {
                         let data = (*datas)
                             .as_ref()
                             .map(|rpit| rpit.impl_traits[idx as usize].bounds.clone());
-                        data.clone().subst(&opaque_ty.parameters)
+                        data.subst(&opaque_ty.parameters)
                     }
                 };
                 write!(f, "impl ")?;
diff --git a/crates/ra_hir_ty/src/infer/expr.rs b/crates/ra_hir_ty/src/infer/expr.rs
index 22884522a..06baac2a9 100644
--- a/crates/ra_hir_ty/src/infer/expr.rs
+++ b/crates/ra_hir_ty/src/infer/expr.rs
@@ -85,10 +85,8 @@ impl<'a> InferenceContext<'a> {
             ctor: TypeCtor::Tuple { cardinality: num_args as u16 },
             parameters,
         });
-        let substs = Substs::build_for_generics(&generic_params)
-            .push(ty.clone())
-            .push(arg_ty.clone())
-            .build();
+        let substs =
+            Substs::build_for_generics(&generic_params).push(ty.clone()).push(arg_ty).build();
 
         let trait_env = Arc::clone(&self.trait_env);
         let implements_fn_trait =
diff --git a/crates/ra_hir_ty/src/lib.rs b/crates/ra_hir_ty/src/lib.rs
index 7f3f5e771..c12bed4af 100644
--- a/crates/ra_hir_ty/src/lib.rs
+++ b/crates/ra_hir_ty/src/lib.rs
@@ -891,7 +891,7 @@ impl Ty {
                             let data = (*it)
                                 .as_ref()
                                 .map(|rpit| rpit.impl_traits[idx as usize].bounds.clone());
-                            data.clone().subst(&opaque_ty.parameters)
+                            data.subst(&opaque_ty.parameters)
                         })
                     }
                 };
diff --git a/crates/ra_hir_ty/src/lower.rs b/crates/ra_hir_ty/src/lower.rs
index 3dc154e92..01af3187b 100644
--- a/crates/ra_hir_ty/src/lower.rs
+++ b/crates/ra_hir_ty/src/lower.rs
@@ -720,8 +720,7 @@ fn assoc_type_bindings_from_type_bound<'a>(
                 None => return SmallVec::<[GenericPredicate; 1]>::new(),
                 Some(t) => t,
             };
-            let projection_ty =
-                ProjectionTy { associated_ty, parameters: super_trait_ref.substs.clone() };
+            let projection_ty = ProjectionTy { associated_ty, parameters: super_trait_ref.substs };
             let mut preds = SmallVec::with_capacity(
                 binding.type_ref.as_ref().map_or(0, |_| 1) + binding.bounds.len(),
             );