From fa93d820413224fffe759999ade98897846a202e Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Emilio=20Cobos=20=C3=81lvarez?= <emilio@crisal.io>
Date: Tue, 23 May 2017 15:49:46 +0200
Subject: [PATCH] style: Reject non-positive resolution values in media
 queries.

Fixes https://bugzilla.mozilla.org/show_bug.cgi?id=1366961
See: https://github.com/w3c/csswg-drafts/issues/1454
---
 components/style/gecko/media_queries.rs | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/components/style/gecko/media_queries.rs b/components/style/gecko/media_queries.rs
index 2444338f174..ff08fcc0813 100644
--- a/components/style/gecko/media_queries.rs
+++ b/components/style/gecko/media_queries.rs
@@ -181,6 +181,10 @@ impl Resolution {
             _ => return Err(()),
         };
 
+        if value <= 0. {
+            return Err(())
+        }
+
         Ok(match_ignore_ascii_case! { &unit,
             "dpi" => Resolution::Dpi(value),
             "dppx" => Resolution::Dppx(value),