needless references

src/interpreter/step.rs

@@ -30,7 +30,7 @@ pub fn step(&mut self) -> EvalResult<'tcx, bool> {
         let mir = self.mir();
         let basic_block = &mir.basic_blocks()[block];
 
-        if let Some(ref stmt) = basic_block.statements.get(stmt_id) {
+        if let Some(stmt) = basic_block.statements.get(stmt_id) {
             let mut new = Ok(0);
             ConstantExtractor {
                 span: stmt.source_info.span,

src/interpreter/vtable.rs

@@ -164,7 +164,7 @@ fn get_vtable_methods(&mut self, impl_id: DefId, substs: &'tcx Substs<'tcx>) ->
                 // method could then never be called, so we do not want to
                 // try and trans it, in that case. Issue #23435.
                 if mth.is_provided {
-                    let predicates = mth.method.predicates.predicates.subst(self.tcx, &mth.substs);
+                    let predicates = mth.method.predicates.predicates.subst(self.tcx, mth.substs);
                     if !self.normalize_and_test_predicates(predicates) {
                         debug!("get_vtable_methods: predicates do not hold");
                         return None;