From bd57498e7d509168609a685b264289643ef8b2c3 Mon Sep 17 00:00:00 2001
From: Oliver Scherer <github35764891676564198441@oli-obk.de>
Date: Mon, 5 Aug 2019 17:49:40 +0200
Subject: [PATCH] Get rid of one more useless `lift` invocation

---
 src/librustc/ty/sty.rs | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/src/librustc/ty/sty.rs b/src/librustc/ty/sty.rs
index e5e47a51e8da..769b6592b6fa 100644
--- a/src/librustc/ty/sty.rs
+++ b/src/librustc/ty/sty.rs
@@ -2305,8 +2305,7 @@ impl<'tcx> Const<'tcx> {
             // because it tries to relate an `Infer` to a `Param`.
             ConstValue::Unevaluated(did, substs) => {
                 // if `substs` has no unresolved components, use and empty param_env
-                let pem_and_substs = param_env.with_reveal_all().and(substs);
-                let (param_env, substs) = tcx.lift_to_global(&pem_and_substs).unwrap().into_parts();
+                let (param_env, substs) = param_env.with_reveal_all().and(substs).into_parts();
                 // try to resolve e.g. associated constants to their definition on an impl
                 let instance = ty::Instance::resolve(tcx, param_env, did, substs)?;
                 let gid = GlobalId {