From 8ea2f3d37083a361401e5acccfacae46b92a203c Mon Sep 17 00:00:00 2001
From: Joshua Harlow <harlowja@yahoo-inc.com>
Date: Tue, 2 Jun 2015 11:48:03 -0700
Subject: [PATCH] Ensure elapsed always >= 0.0 (just incase)

---
 fasteners/_utils.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/fasteners/_utils.py b/fasteners/_utils.py
index 8818b2c..4ac80a4 100644
--- a/fasteners/_utils.py
+++ b/fasteners/_utils.py
@@ -36,7 +36,8 @@ class StopWatch(object):
             t = self.stopped_at
         else:
             t = now()
-        return t - self.started_at
+        e = t - self.started_at
+        return max(0.0, e)
 
     def __enter__(self):
         self.start()