From 7466740a9386eb429293bc8e95827c3ba87c0bc6 Mon Sep 17 00:00:00 2001
From: Michael Woerister <michaelwoerister@posteo>
Date: Wed, 4 Apr 2018 17:53:16 +0200
Subject: [PATCH] Fix error in rustc_driver::test.

---
 src/librustc_driver/test.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/librustc_driver/test.rs b/src/librustc_driver/test.rs
index 9efd8844977f..971855ee2d00 100644
--- a/src/librustc_driver/test.rs
+++ b/src/librustc_driver/test.rs
@@ -303,7 +303,7 @@ impl<'a, 'gcx, 'tcx> Env<'a, 'gcx, 'tcx> {
 
     pub fn t_param(&self, index: u32) -> Ty<'tcx> {
         let name = format!("T{}", index);
-        self.infcx.tcx.mk_param(index, Symbol::intern(&name))
+        self.infcx.tcx.mk_param(index, Symbol::intern(&name).as_str())
     }
 
     pub fn re_early_bound(&self, index: u32, name: &'static str) -> ty::Region<'tcx> {