Auto merge of #7727 - michaelwu:update-bindings, r=jdm

Support the updated spidermonkey bindings

Still need to finish the rust-mozjs update and make cargo use it, but it's close enough that I don't expect much to change on the servo side.

Some changes here
- bools are properly translated now
- char16_t is handled as u16 now
- JS_GlobalObjectTraceHook isn't mangled now
- JSJitInfo has been adjusted
- A const fn is used to generate bitfields in JSJitInfo
- Manually generating handles now requires calling an unsafe function. It's not actually required, but it's too much of a hassle to generate them manually now due to bindgen++ adding base classes now.

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1 files changed, 5 insertions, 2 deletions

diff --git a/components/script/dom/errorevent.rs b/components/script/dom/errorevent.rs
index e58a80ca259..2d95586c350 100644
--- a/components/script/dom/errorevent.rs
+++ b/components/script/dom/errorevent.rs
@@ -13,7 +13,7 @@ use dom::bindings::js::{MutHeapJSVal, Root};
 use dom::bindings::trace::JSTraceable;
 use dom::bindings::utils::reflect_dom_object;
 use dom::event::{Event, EventBubbles, EventCancelable};
-use js::jsapi::{HandleValue, JSContext};
+use js::jsapi::{RootedValue, HandleValue, JSContext};
 use js::jsval::JSVal;
 use std::borrow::ToOwned;
 use std::cell::Cell;
@@ -102,11 +102,14 @@ impl ErrorEvent {
             EventCancelable::NotCancelable
         };
 
+        // Dictionaries need to be rooted
+        // https://github.com/servo/servo/issues/6381
+        let error = RootedValue::new(global.get_cx(), init.error);
         let event = ErrorEvent::new(global, type_,
                                 bubbles, cancelable,
                                 msg, file_name,
                                 line_num, col_num,
-                                HandleValue { ptr: &init.error });
+                                error.handle());
         Ok(event)
     }