//@ run-rustfix
#![allow(unused_imports)]
use std::borrow::BorrowMut;
use std::cell::RefCell;
use std::rc::Rc;

fn main() {
    let rc = Rc::new(RefCell::new(true));
    *std::cell::RefCell::<_>::borrow_mut(&rc) = false; //~ ERROR E0308
}