From 138c03b24d37aaeaefa2ebed1688acdfda8e262a Mon Sep 17 00:00:00 2001
From: Simon Sapin <simon.sapin@exyr.org>
Date: Tue, 13 Jun 2017 00:51:41 +0200
Subject: [PATCH] Stylo: avoid atom refcount traffic in ID selector matching

---
 components/style/gecko/wrapper.rs | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/components/style/gecko/wrapper.rs b/components/style/gecko/wrapper.rs
index 2ec79c36372e..17be81fe1466 100644
--- a/components/style/gecko/wrapper.rs
+++ b/components/style/gecko/wrapper.rs
@@ -1593,7 +1593,19 @@ impl<'le> ::selectors::Element for GeckoElement<'le> {
     }
 
     fn has_id(&self, id: &Atom, case_sensitivity: CaseSensitivity) -> bool {
-        self.get_id().map_or(false, |atom| case_sensitivity.eq_atom(&atom, id))
+        if !self.has_id() {
+            return false
+        }
+
+        unsafe {
+            let ptr = bindings::Gecko_AtomAttrValue(self.0, atom!("id").as_ptr());
+
+            if ptr.is_null() {
+                false
+            } else {
+                case_sensitivity.eq_atom(WeakAtom::new(ptr), id)
+            }
+        }
     }
 
     fn has_class(&self, name: &Atom, case_sensitivity: CaseSensitivity) -> bool {