From 9980415fbdc656b4b67f2cc4611d03fde2951435 Mon Sep 17 00:00:00 2001
From: Niko Matsakis <niko@alum.mit.edu>
Date: Fri, 1 Jun 2018 16:39:17 -0400
Subject: [PATCH] key drop-data computation by ty, not var

---
 src/librustc_mir/borrow_check/nll/type_check/liveness.rs | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/librustc_mir/borrow_check/nll/type_check/liveness.rs b/src/librustc_mir/borrow_check/nll/type_check/liveness.rs
index 80b9dde98c23..75e0bd025f23 100644
--- a/src/librustc_mir/borrow_check/nll/type_check/liveness.rs
+++ b/src/librustc_mir/borrow_check/nll/type_check/liveness.rs
@@ -66,7 +66,7 @@ where
     liveness: &'gen LivenessResults,
     flow_inits: &'gen mut FlowAtLocation<MaybeInitializedPlaces<'flow, 'gcx, 'tcx>>,
     move_data: &'gen MoveData<'tcx>,
-    drop_data: FxHashMap<Local, DropData<'tcx>>,
+    drop_data: FxHashMap<Ty<'tcx>, DropData<'tcx>>,
 }
 
 struct DropData<'tcx> {
@@ -194,7 +194,7 @@ impl<'gen, 'typeck, 'flow, 'gcx, 'tcx> TypeLivenessGenerator<'gen, 'typeck, 'flo
             dropped_local, dropped_ty, location
         );
 
-        let drop_data = self.drop_data.entry(dropped_local).or_insert_with({
+        let drop_data = self.drop_data.entry(dropped_ty).or_insert_with({
             let cx = &mut self.cx;
             move || Self::compute_drop_data(cx, dropped_ty)
         });