From 4ca127789d167f5d82c0e76e57649e35216afffc Mon Sep 17 00:00:00 2001
From: Falco Hirschenberger <falco.hirschenberger@gmail.com>
Date: Thu, 24 Jul 2014 23:49:30 +0200
Subject: [PATCH] Fix display of `-NaN%` in borrock stats caused by div by zero

---
 src/librustc/middle/borrowck/mod.rs | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/librustc/middle/borrowck/mod.rs b/src/librustc/middle/borrowck/mod.rs
index 5604d33496d..c9cdcc5bc0d 100644
--- a/src/librustc/middle/borrowck/mod.rs
+++ b/src/librustc/middle/borrowck/mod.rs
@@ -98,9 +98,9 @@ pub fn check_crate(tcx: &ty::ctxt,
     }
 
     fn make_stat(bccx: &BorrowckCtxt, stat: uint) -> String {
-        let stat_f = stat as f64;
         let total = bccx.stats.guaranteed_paths.get() as f64;
-        format!("{} ({:.0f}%)", stat  , stat_f * 100.0 / total)
+        let perc = if total == 0.0 { 0.0 } else { stat as f64 * 100.0 / total };
+        format!("{} ({:.0f}%)", stat, perc)
     }
 }