From 16ca8de6df3ef7e896ccf721b8ee38f7f6d8ea33 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Emilio=20Cobos=20=C3=81lvarez?= <emilio@crisal.io>
Date: Sat, 28 Apr 2018 09:24:57 +0200
Subject: [PATCH] style: Compare degrees for font-style to account for
 compute_angle introducing error.

---
 components/style/values/computed/font.rs | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/components/style/values/computed/font.rs b/components/style/values/computed/font.rs
index 1a4a2ed4849..edcfb6e32cb 100644
--- a/components/style/values/computed/font.rs
+++ b/components/style/values/computed/font.rs
@@ -912,7 +912,10 @@ impl ToCss for FontStyle {
             generics::FontStyle::Italic => dest.write_str("italic"),
             generics::FontStyle::Oblique(ref angle) => {
                 dest.write_str("oblique")?;
-                if *angle != Self::default_angle() {
+                // Use `degrees` instead of just comparing Angle because
+                // `degrees` can return slightly different values due to
+                // floating point conversions.
+                if angle.0.degrees() != Self::default_angle().0.degrees() {
                     dest.write_char(' ')?;
                     angle.to_css(dest)?;
                 }