src/test/ui/issues/issue-7013.rs

   1 #![feature(box_syntax)]
   2
   3 use std::cell::RefCell;
   4 use std::rc::Rc;
   5
   6 trait Foo {
   7     fn set(&mut self, v: Rc<RefCell<A>>);
   8 }
   9
  10 struct B {
  11     v: Option<Rc<RefCell<A>>>
  12 }
  13
  14 impl Foo for B {
  15     fn set(&mut self, v: Rc<RefCell<A>>)
  16     {
  17         self.v = Some(v);
  18     }
  19 }
  20
  21 struct A {
  22     v: Box<dyn Foo + Send>,
  23 }
  24
  25 fn main() {
  26     let a = A {v: box B{v: None} as Box<dyn Foo + Send>};
  27     //~^ ERROR `std::rc::Rc<std::cell::RefCell<A>>` cannot be sent between threads safely
  28 }