From 7a99b6db15fb657128a7cccd1f22faae287f0776 Mon Sep 17 00:00:00 2001
From: Alex Crichton <alex@alexcrichton.com>
Date: Sat, 17 Nov 2018 01:50:38 -0800
Subject: [PATCH] std: Add debugging for a failing test on appveyor

I'm not sure why this is failing, so let's hopefully get some more
information to help investigation!
---
 src/libstd/time.rs | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/libstd/time.rs b/src/libstd/time.rs
index 90ab349159915..d124cf53dda5d 100644
--- a/src/libstd/time.rs
+++ b/src/libstd/time.rs
@@ -481,7 +481,8 @@ mod tests {
             let (a, b) = ($a, $b);
             if a != b {
                 let (a, b) = if a > b {(a, b)} else {(b, a)};
-                assert!(a - Duration::new(0, 100) <= b);
+                assert!(a - Duration::new(0, 100) <= b,
+                        "{:?} is not almost equal to {:?}", a, b);
             }
         })
     }
@@ -503,7 +504,10 @@ mod tests {
     fn instant_math() {
         let a = Instant::now();
         let b = Instant::now();
+        println!("a: {:?}", a);
+        println!("b: {:?}", b);
         let dur = b.duration_since(a);
+        println!("dur: {:?}", dur);
         assert_almost_eq!(b - dur, a);
         assert_almost_eq!(a + dur, b);