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-rw-r--r--dom/xbl/nsXBLBinding.cpp12
1 files changed, 11 insertions, 1 deletions
diff --git a/dom/xbl/nsXBLBinding.cpp b/dom/xbl/nsXBLBinding.cpp
index 6ae17c4c0..d9a2aacc5 100644
--- a/dom/xbl/nsXBLBinding.cpp
+++ b/dom/xbl/nsXBLBinding.cpp
@@ -1014,7 +1014,17 @@ nsXBLBinding::DoInitJSClass(JSContext *cx,
NS_ENSURE_TRUE(xblScope, NS_ERROR_UNEXPECTED);
JS::Rooted<JSObject*> parent_proto(cx);
- if (!JS_GetPrototype(cx, obj, &parent_proto)) {
+ {
+ JS::RootedObject wrapped(cx, obj);
+ JSAutoCompartment ac(cx, xblScope);
+ if (!JS_WrapObject(cx, &wrapped)) {
+ return NS_ERROR_FAILURE;
+ }
+ if (!JS_GetPrototype(cx, wrapped, &parent_proto)) {
+ return NS_ERROR_FAILURE;
+ }
+ }
+ if (!JS_WrapObject(cx, &parent_proto)) {
return NS_ERROR_FAILURE;
}