2 files changed, 11 insertions, 0 deletions
diff --git a/dom/script/ScriptLoader.cpp b/dom/script/ScriptLoader.cpp
index 71838580f..362c27f3e 100644
--- a/dom/script/ScriptLoader.cpp
+++ b/dom/script/ScriptLoader.cpp
@@ -477,6 +477,11 @@ ScriptLoader::GetFetchedModule(nsIURI* aURL) const
   return ms;
 }
 
+void ScriptLoader::ClearModuleMap() {
+  MOZ_ASSERT(mFetchingModules.IsEmpty());
+  mFetchedModules.Clear();
+}
+
 nsresult
 ScriptLoader::ProcessFetchedModuleSource(ModuleLoadRequest* aRequest)
 {
diff --git a/dom/script/ScriptLoader.h b/dom/script/ScriptLoader.h
index 2c5b683e7..73f2a9258 100644
--- a/dom/script/ScriptLoader.h
+++ b/dom/script/ScriptLoader.h
@@ -506,6 +506,12 @@ public:
     return mPendingChildLoaders.AppendElement(aChild) != nullptr;
   }
 
+  /*
+   * Clear the map of loaded modules. Called when a Document object is reused
+   * for a different global.
+   */
+  void ClearModuleMap();
+
 private:
   virtual ~ScriptLoader();