diff --git a/src/interpreter/vtable.rs b/src/interpreter/vtable.rs
index 6a3de7aae808..726c6ce3913a 100644
--- a/src/interpreter/vtable.rs
+++ b/src/interpreter/vtable.rs
@@ -20,8 +20,8 @@ impl<'a, 'tcx> EvalContext<'a, 'tcx> {
 
         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(_) => {
diff --git a/src/memory.rs b/src/memory.rs
index c02ea22c1d99..79b4b8b64d61 100644
--- a/src/memory.rs
+++ b/src/memory.rs
@@ -314,7 +314,7 @@ impl<'a, 'tcx> Memory<'a, 'tcx> {
             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),