From 832807f15f14e750172875b24bbc2a47896cc17d Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Emilio=20Cobos=20=C3=81lvarez?= <emilio@crisal.io>
Date: Sun, 21 May 2023 22:01:52 +0200
Subject: [PATCH] style: Reserve -- as a custom property name

I think this should be fairly low risk, let's try to get it done sooner
rather than later.

Differential Revision: https://phabricator.services.mozilla.com/D116456
---
 components/style/custom_properties.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/components/style/custom_properties.rs b/components/style/custom_properties.rs
index b5461e1cbae..c031a0e3d87 100644
--- a/components/style/custom_properties.rs
+++ b/components/style/custom_properties.rs
@@ -88,7 +88,7 @@ pub type Name = Atom;
 ///
 /// <https://drafts.csswg.org/css-variables/#typedef-custom-property-name>
 pub fn parse_name(s: &str) -> Result<&str, ()> {
-    if s.starts_with("--") {
+    if s.starts_with("--") && s.len() > 2 {
         Ok(&s[2..])
     } else {
         Err(())