From e50e704f5a2f09e1a4f6e6175fe3bfc6389adf00 Mon Sep 17 00:00:00 2001
From: Rohan Prinja <rohan.prinja@gmail.com>
Date: Sun, 28 Sep 2014 09:44:43 +0530
Subject: [PATCH] trace keys as well

---
 components/script/dom/bindings/trace.rs | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/components/script/dom/bindings/trace.rs b/components/script/dom/bindings/trace.rs
index 5f2d9e524fcf..0d87892aecf3 100644
--- a/components/script/dom/bindings/trace.rs
+++ b/components/script/dom/bindings/trace.rs
@@ -211,10 +211,11 @@ impl<T: JSTraceable> JSTraceable for Option<T> {
     }
 }
 
-impl<K: Eq+Hash, V: JSTraceable> JSTraceable for HashMap<K, V> {
+impl<K: Eq+Hash+JSTraceable, V: JSTraceable> JSTraceable for HashMap<K, V> {
     #[inline]
     fn trace(&self, trc: *mut JSTracer) {
         for e in self.iter() {
+            e.val0().trace(trc);
             e.val1().trace(trc);
         }
     }