From 0309664491ba2cebc3dc7f509cfbad864f35d8d1 Mon Sep 17 00:00:00 2001
From: Ralf Jung <post@ralfj.de>
Date: Thu, 20 Sep 2018 12:27:50 +0200
Subject: [PATCH] fix stage 0 compilation

---
 src/librustc_mir/const_eval.rs | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/librustc_mir/const_eval.rs b/src/librustc_mir/const_eval.rs
index bde0e95d372f..99a49122ef7e 100644
--- a/src/librustc_mir/const_eval.rs
+++ b/src/librustc_mir/const_eval.rs
@@ -362,9 +362,10 @@ impl<'a, 'mir, 'tcx> interpret::Machine<'a, 'mir, 'tcx>
             }
         }
 
+        let span = ecx.frame().span;
         ecx.machine.loop_detector.observe_and_analyze(
             &ecx.tcx,
-            ecx.frame().span,
+            span,
             &ecx.memory,
             &ecx.stack[..],
         )