From f873c1e2db8d06be6a816b838655906fa9f2dac9 Mon Sep 17 00:00:00 2001
From: Niko Matsakis <niko@alum.mit.edu>
Date: Wed, 14 Feb 2018 16:00:07 -0500
Subject: [PATCH] require `Lifted` types to outlive `'tcx`

---
 src/librustc/ty/context.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/librustc/ty/context.rs b/src/librustc/ty/context.rs
index b760649c37d..e7d6bdd3383 100644
--- a/src/librustc/ty/context.rs
+++ b/src/librustc/ty/context.rs
@@ -1508,7 +1508,7 @@ impl<'gcx: 'tcx, 'tcx> GlobalCtxt<'gcx> {
 /// pointer differs. The latter case is possible if a primitive type,
 /// e.g. `()` or `u8`, was interned in a different context.
 pub trait Lift<'tcx> {
-    type Lifted;
+    type Lifted: 'tcx;
     fn lift_to_tcx<'a, 'gcx>(&self, tcx: TyCtxt<'a, 'gcx, 'tcx>) -> Option<Self::Lifted>;
 }