From 01915d84dbd4a3d7497c8afd2744d5200510e7c6 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Emilio=20Cobos=20=C3=81lvarez?= <emilio@crisal.io>
Date: Thu, 8 Feb 2018 12:21:27 +0100
Subject: [PATCH] style: Assert we don't try to do dumb stuff.

MozReview-Commit-ID: 6DpkiwUdccD
---
 components/style/stylesheet_set.rs | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/components/style/stylesheet_set.rs b/components/style/stylesheet_set.rs
index e7c7599311e..37c06f109c2 100644
--- a/components/style/stylesheet_set.rs
+++ b/components/style/stylesheet_set.rs
@@ -367,6 +367,9 @@ where
 
     fn set_data_validity_at_least(&mut self, validity: OriginValidity) {
         use std::cmp;
+
+        debug_assert_ne!(validity, OriginValidity::Valid);
+
         self.dirty = true;
         self.data_validity = cmp::max(validity, self.data_validity);
     }