From f422c7dca46fdd2a49f08b8c3ae60df178c83552 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Emilio=20Cobos=20=C3=81lvarez?= <emilio@crisal.io>
Date: Sat, 3 Mar 2018 22:34:11 +0100
Subject: [PATCH] style: Assert sanity in GeckoNode::as_document.

---
 components/style/gecko/wrapper.rs | 1 +
 1 file changed, 1 insertion(+)

diff --git a/components/style/gecko/wrapper.rs b/components/style/gecko/wrapper.rs
index 8126f2e8670..34310df5522 100644
--- a/components/style/gecko/wrapper.rs
+++ b/components/style/gecko/wrapper.rs
@@ -383,6 +383,7 @@ impl<'ln> TNode for GeckoNode<'ln> {
             return None;
         }
 
+        debug_assert_eq!(self.owner_doc().as_node(), *self, "How?");
         Some(self.owner_doc())
     }