error[E0716]: temporary value dropped while borrowed
   --> components/script/dom/readablestream.rs:219:39
    |
219 |         let realm = InRealm::Already(&cx.into());
    |                                       ^^^^^^^^^ - temporary value is freed at the end of this statement
    |                                       |
    |                                       creates a temporary value which is freed while still in use
...
274 |         self.check_and_propagate_errors_forward(cx, &global, realm, can_gc);
    |                                                              ----- borrow later used here
    |
help: consider using a `let` binding to create a longer lived value
    |
219 ~         let binding = cx.into();
220 ~         let realm = InRealm::Already(&binding);
    |