From 692d4e847da191c68206ecac06cc4bb9aeb59555 Mon Sep 17 00:00:00 2001
From: Ms2ger <ms2ger@gmail.com>
Date: Sat, 26 Jul 2014 17:09:38 +0200
Subject: [PATCH] Assert that we're handed a DOM global in initialize_global.

---
 src/components/script/dom/bindings/utils.rs | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/components/script/dom/bindings/utils.rs b/src/components/script/dom/bindings/utils.rs
index 1e2e38c0141..8e572414d0e 100644
--- a/src/components/script/dom/bindings/utils.rs
+++ b/src/components/script/dom/bindings/utils.rs
@@ -410,9 +410,11 @@ pub extern fn ThrowingConstructor(_cx: *mut JSContext, _argc: c_uint, _vp: *mut
 }
 
 /// Construct and cache the ProtoOrIfaceArray for the given global.
+/// Fails if the argument is not a DOM global.
 pub fn initialize_global(global: *mut JSObject) {
     let protoArray = box () ([0 as *mut JSObject, ..PrototypeList::id::IDCount as uint]);
     unsafe {
+        assert!(((*JS_GetClass(global)).flags & JSCLASS_DOM_GLOBAL) != 0);
         let box_ = squirrel_away_unique(protoArray);
         JS_SetReservedSlot(global,
                            DOM_PROTOTYPE_SLOT,