needless clones

src/interpreter/vtable.rs

@@ -20,8 +20,8 @@ pub fn get_vtable(&mut self, trait_ref: ty::PolyTraitRef<'tcx>) -> EvalResult<'t
 
         debug!("get_vtable(trait_ref={:?})", trait_ref);
 
-        let methods: Vec<_> = traits::supertraits(tcx, trait_ref.clone()).flat_map(|trait_ref| {
-            match self.fulfill_obligation(trait_ref.clone()) {
+        let methods: Vec<_> = traits::supertraits(tcx, trait_ref).flat_map(|trait_ref| {
+            match self.fulfill_obligation(trait_ref) {
                 // Should default trait error here?
                 traits::VtableDefaultImpl(_) |
                 traits::VtableBuiltin(_) => {

src/memory.rs

@@ -314,7 +314,7 @@ pub fn get_closure(&self, id: AllocId) -> EvalResult<'tcx, (DefId, ClosureSubsts
             Some(&FunctionDefinition {
                 def_id,
                 kind: FunctionKind::Closure { ref substs, ref ty }
-            }) => Ok((def_id, substs.clone(), ty.clone())),
+            }) => Ok((def_id, *substs, ty.clone())),
             Some(&FunctionDefinition {
                 kind: FunctionKind::Function { .. }, ..
             }) => Err(EvalError::CalledClosureAsFunction),