Protecting the security and privacy of individuals is a central tenet of Mozilla’s mission. While we continue to make extensive use of both sandboxing and Rust in Firefox to address ...

This is part of a much more complicated scenario, but I’ve reduced this down to what is closer to a minimal case.  #![allow(unused)] use std::cell::RefCell; use std::collections::HashMap; use std::rc::Rc;  fn main() {     println!("This won't compile"); }  pub type SmartSheep = Rc<RefCell>;  pub struct Sheep {     pub name: String,     pub age: usize,     pub stats: HashMap<String, String>,     pub father: Option, }  impl Sheep {     pub fn new(name: &str, age: usize, father: ...