From 5aeb6c756e4b6e28366dee28802022430c66605e Mon Sep 17 00:00:00 2001
From: "Felix S. Klock II" <pnkfelix@pnkfx.org>
Date: Sat, 3 Nov 2018 02:24:50 +0100
Subject: [PATCH] Sidestep an ICE by providing *some* description for `ReEmpty`
 when it arises.

---
 src/librustc/infer/error_reporting/mod.rs | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/librustc/infer/error_reporting/mod.rs b/src/librustc/infer/error_reporting/mod.rs
index d19c495af3b9..6c5f10332956 100644
--- a/src/librustc/infer/error_reporting/mod.rs
+++ b/src/librustc/infer/error_reporting/mod.rs
@@ -178,6 +178,7 @@ impl<'a, 'gcx, 'tcx> TyCtxt<'a, 'gcx, 'tcx> {
                 self.msg_span_from_early_bound_and_free_regions(region)
             }
             ty::ReStatic => ("the static lifetime".to_owned(), None),
+            ty::ReEmpty => ("an empty lifetime".to_owned(), None),
             _ => bug!("{:?}", region),
         }
     }