auto merge of #4554 : servo/servo/rustup_20141221, r=jdm

1 files changed, 4 insertions, 3 deletions

diff --git a/components/script/dom/bindings/callback.rs b/components/script/dom/bindings/callback.rs
index ec6071e0700..29741117383 100644
--- a/components/script/dom/bindings/callback.rs
+++ b/components/script/dom/bindings/callback.rs
@@ -16,6 +16,7 @@ use js::jsval::{JSVal, UndefinedValue};
 use std::ptr;
 
 /// The exception handling used for a call.
+#[deriving(Copy)]
 pub enum ExceptionHandling {
     /// Report any exception and don't throw it to the caller code.
     ReportExceptions,
@@ -28,7 +29,7 @@ pub enum ExceptionHandling {
 }
 
 /// A common base class for representing IDL callback function types.
-#[deriving(Clone,PartialEq)]
+#[deriving(Copy, Clone,PartialEq)]
 #[jstraceable]
 pub struct CallbackFunction {
     object: CallbackObject
@@ -46,7 +47,7 @@ impl CallbackFunction {
 }
 
 /// A common base class for representing IDL callback interface types.
-#[deriving(Clone,PartialEq)]
+#[deriving(Copy, Clone,PartialEq)]
 #[jstraceable]
 pub struct CallbackInterface {
     object: CallbackObject
@@ -55,7 +56,7 @@ pub struct CallbackInterface {
 /// A common base class for representing IDL callback function and
 /// callback interface types.
 #[allow(raw_pointer_deriving)]
-#[deriving(Clone,PartialEq)]
+#[deriving(Copy, Clone,PartialEq)]
 #[jstraceable]
 struct CallbackObject {
     /// The underlying `JSObject`.