From b49003289366411f7d5e0359af2c3de3b5b850e7 Mon Sep 17 00:00:00 2001
From: Santiago Pastorino <spastorino@gmail.com>
Date: Fri, 19 Jul 2019 22:41:52 +0200
Subject: [PATCH] Avoid cloning Place in assign #1

---
 src/librustc_mir/transform/qualify_consts.rs | 11 +++--------
 1 file changed, 3 insertions(+), 8 deletions(-)

diff --git a/src/librustc_mir/transform/qualify_consts.rs b/src/librustc_mir/transform/qualify_consts.rs
index eadda7b52a164..da8304419bf23 100644
--- a/src/librustc_mir/transform/qualify_consts.rs
+++ b/src/librustc_mir/transform/qualify_consts.rs
@@ -865,14 +865,9 @@ impl<'a, 'tcx> Checker<'a, 'tcx> {
                 (base, Some(proj)) => {
                     // Catch more errors in the destination. `visit_place` also checks various
                     // projection rules like union field access and raw pointer deref
-                    self.visit_place(
-                        &Place {
-                            base: base.clone(),
-                            projection: dest_projection.clone(),
-                        },
-                        PlaceContext::MutatingUse(MutatingUseContext::Store),
-                        location
-                    );
+                    let context = PlaceContext::MutatingUse(MutatingUseContext::Store);
+                    self.visit_place_base(base, context, location);
+                    self.visit_projection(base, proj, context, location);
                     dest_projection = &proj.base;
                 },
                 (&PlaceBase::Static(box Static {