1 files changed, 12 insertions, 0 deletions
diff --git a/components/script/dom/bindings/trace.rs b/components/script/dom/bindings/trace.rs
index 06ee56e173a..2d568208b69 100644
--- a/components/script/dom/bindings/trace.rs
+++ b/components/script/dom/bindings/trace.rs
@@ -119,6 +119,7 @@ use std::sync::atomic::{AtomicBool, AtomicUsize};
 use std::sync::{Arc, Mutex};
 use std::time::{Instant, SystemTime};
 use style::attr::{AttrIdentifier, AttrValue, LengthOrPercentageOrAuto};
+use style::author_styles::AuthorStyles;
 use style::context::QuirksMode;
 use style::dom::OpaqueNode;
 use style::element_state::*;
@@ -130,6 +131,7 @@ use style::stylesheet_set::{AuthorStylesheetSet, DocumentStylesheetSet};
 use style::stylesheets::keyframes_rule::Keyframe;
 use style::stylesheets::{CssRules, FontFaceRule, KeyframesRule, MediaRule, Stylesheet};
 use style::stylesheets::{ImportRule, NamespaceRule, StyleRule, SupportsRule, ViewportRule};
+use style::stylist::CascadeData;
 use style::values::specified::Length;
 use tendril::fmt::UTF8;
 use tendril::stream::LossyDecoder;
@@ -499,6 +501,7 @@ unsafe_no_jsmanaged_fields!(Rotation3D<f64>, Transform2D<f32>, Transform3D<f64>)
 unsafe_no_jsmanaged_fields!(Point2D<f32>, Vector2D<f32>, Rect<Au>);
 unsafe_no_jsmanaged_fields!(Rect<f32>, RigidTransform3D<f64>);
 unsafe_no_jsmanaged_fields!(StyleSheetListOwner);
+unsafe_no_jsmanaged_fields!(CascadeData);
 
 unsafe impl<'a> JSTraceable for &'a str {
     #[inline]
@@ -728,6 +731,15 @@ where
     }
 }
 
+unsafe impl<S> JSTraceable for AuthorStyles<S>
+where
+    S: JSTraceable + ::style::stylesheets::StylesheetInDocument + PartialEq + 'static,
+{
+    unsafe fn trace(&self, tracer: *mut JSTracer) {
+        self.stylesheets.trace(tracer)
+    }
+}
+
 unsafe impl<Sink> JSTraceable for LossyDecoder<Sink>
 where
     Sink: JSTraceable + TendrilSink<UTF8>,