From 4c02ad00efd8bf043ef0233fb5148b9cb4e76a2c Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Emilio=20Cobos=20=C3=81lvarez?= <emilio@crisal.io>
Date: Sat, 25 Nov 2017 02:06:36 +0100
Subject: [PATCH] style: Don't insert into the `seen` set before ignoring
 document colors.

Otherwise we may stop honoring other colors in other cascade levels.

Fixes: #19370
---
 components/style/properties/properties.mako.rs | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/components/style/properties/properties.mako.rs b/components/style/properties/properties.mako.rs
index de650d52e3c..f1ddcd53b2b 100644
--- a/components/style/properties/properties.mako.rs
+++ b/components/style/properties/properties.mako.rs
@@ -3330,7 +3330,6 @@ where
             if seen.contains(physical_longhand_id) {
                 continue
             }
-            seen.insert(physical_longhand_id);
 
             let mut declaration = match *declaration {
                 PropertyDeclaration::WithVariables(id, ref unparsed) => {
@@ -3376,6 +3375,8 @@ where
                 }
             }
 
+            seen.insert(physical_longhand_id);
+
             % if category_to_cascade_now == "early":
                 if LonghandId::FontSize == longhand_id {
                     font_size = Some(declaration.clone());