1 files changed, 1 insertions, 5 deletions
diff --git a/js/public/Stack.h b/js/public/Stack.h
index 6f01b2b728..7384e92d39 100644
--- a/js/public/Stack.h
+++ b/js/public/Stack.h
@@ -140,6 +140,7 @@ struct JS_PUBLIC_API FirstSubsumedFrame {
   // unnecessarily.
   FirstSubsumedFrame(const FirstSubsumedFrame&) = delete;
   FirstSubsumedFrame& operator=(const FirstSubsumedFrame&) = delete;
+  FirstSubsumedFrame& operator=(FirstSubsumedFrame&&) = delete;
 
   FirstSubsumedFrame(FirstSubsumedFrame&& rhs)
       : principals(rhs.principals), ignoreSelfHosted(rhs.ignoreSelfHosted) {
@@ -147,11 +148,6 @@ struct JS_PUBLIC_API FirstSubsumedFrame {
     rhs.principals = nullptr;
   }
 
-  FirstSubsumedFrame& operator=(FirstSubsumedFrame&& rhs) {
-    new (this) FirstSubsumedFrame(std::move(rhs));
-    return *this;
-  }
-
   ~FirstSubsumedFrame() {
     if (principals) {
       JS_DropPrincipals(cx, principals);