3 files changed, 15 insertions, 17 deletions

diff --git a/crates/hir_ty/src/infer/coerce.rs b/crates/hir_ty/src/infer/coerce.rs
index 765a02b1c..03b97e7db 100644
--- a/crates/hir_ty/src/infer/coerce.rs
+++ b/crates/hir_ty/src/infer/coerce.rs
@@ -76,17 +76,17 @@ impl<'a> InferenceContext<'a> {
         // way around first would mean we make the type variable `!`, instead of
         // just marking it as possibly diverging.
         if self.coerce(&ty2, &ty1) {
-            ty1.clone()
+            ty1
         } else if self.coerce(&ty1, &ty2) {
-            ty2.clone()
+            ty2
         } else {
             if let Some(id) = id {
                 self.result
                     .type_mismatches
-                    .insert(id.into(), TypeMismatch { expected: ty1.clone(), actual: ty2.clone() });
+                    .insert(id.into(), TypeMismatch { expected: ty1.clone(), actual: ty2 });
             }
             cov_mark::hit!(coerce_merge_fail_fallback);
-            ty1.clone()
+            ty1
         }
     }
 
@@ -183,7 +183,7 @@ impl<'a> InferenceContext<'a> {
         // details of coercion errors though, so I think it's useful to leave
         // the structure like it is.
 
-        let canonicalized = self.canonicalize(from_ty.clone());
+        let canonicalized = self.canonicalize(from_ty);
         let autoderef = autoderef::autoderef(
             self.db,
             self.resolver.krate(),
@@ -389,7 +389,7 @@ impl<'a> InferenceContext<'a> {
                 // The CoerceUnsized trait should have two generic params: Self and T.
                 return Err(TypeError);
             }
-            b.push(coerce_from.clone()).push(to_ty.clone()).build()
+            b.push(coerce_from).push(to_ty.clone()).build()
         };
 
         let goal: InEnvironment<DomainGoal> =
diff --git a/crates/hir_ty/src/infer/expr.rs b/crates/hir_ty/src/infer/expr.rs
index 79a732106..97507305c 100644
--- a/crates/hir_ty/src/infer/expr.rs
+++ b/crates/hir_ty/src/infer/expr.rs
@@ -44,7 +44,7 @@ impl<'a> InferenceContext<'a> {
             if !could_unify {
                 self.result.type_mismatches.insert(
                     tgt_expr.into(),
-                    TypeMismatch { expected: expected_ty.clone(), actual: ty.clone() },
+                    TypeMismatch { expected: expected_ty, actual: ty.clone() },
                 );
             }
         }
@@ -57,15 +57,14 @@ impl<'a> InferenceContext<'a> {
         let ty = self.infer_expr_inner(expr, &expected);
         let ty = if let Some(target) = expected.only_has_type(&mut self.table) {
             if !self.coerce(&ty, &target) {
-                self.result.type_mismatches.insert(
-                    expr.into(),
-                    TypeMismatch { expected: target.clone(), actual: ty.clone() },
-                );
+                self.result
+                    .type_mismatches
+                    .insert(expr.into(), TypeMismatch { expected: target, actual: ty.clone() });
                 // Return actual type when type mismatch.
                 // This is needed for diagnostic when return type mismatch.
                 ty
             } else {
-                target.clone()
+                target
             }
         } else {
             ty
diff --git a/crates/hir_ty/src/infer/pat.rs b/crates/hir_ty/src/infer/pat.rs
index 9c8e3b6ae..83e0a7a9e 100644
--- a/crates/hir_ty/src/infer/pat.rs
+++ b/crates/hir_ty/src/infer/pat.rs
@@ -196,7 +196,7 @@ impl<'a> InferenceContext<'a> {
                 let inner_ty = if let Some(subpat) = subpat {
                     self.infer_pat(*subpat, &expected, default_bm)
                 } else {
-                    expected.clone()
+                    expected
                 };
                 let inner_ty = self.insert_type_vars_shallow(inner_ty);
 
@@ -266,10 +266,9 @@ impl<'a> InferenceContext<'a> {
         // use a new type variable if we got error type here
         let ty = self.insert_type_vars_shallow(ty);
         if !self.unify(&ty, &expected) {
-            self.result.type_mismatches.insert(
-                pat.into(),
-                TypeMismatch { expected: expected.clone(), actual: ty.clone() },
-            );
+            self.result
+                .type_mismatches
+                .insert(pat.into(), TypeMismatch { expected: expected, actual: ty.clone() });
         }
         self.write_pat_ty(pat, ty.clone());
         ty