src/test/run-pass/issues/issue-5708.rs

   1 // run-pass
   2 #![allow(unused_variables)]
   3 /*
   4 # ICE when returning struct with reference to trait
   5
   6 A function which takes a reference to a trait and returns a
   7 struct with that reference results in an ICE.
   8
   9 This does not occur with concrete types, only with references
  10 to traits.
  11 */
  12
  13
  14 // original
  15 trait Inner {
  16     fn print(&self);
  17 }
  18
  19 impl Inner for isize {
  20     fn print(&self) { print!("Inner: {}\n", *self); }
  21 }
  22
  23 struct Outer<'a> {
  24     inner: &'a (Inner+'a)
  25 }
  26
  27 impl<'a> Outer<'a> {
  28     fn new(inner: &Inner) -> Outer {
  29         Outer {
  30             inner: inner
  31         }
  32     }
  33 }
  34
  35 pub fn main() {
  36     let inner: isize = 5;
  37     let outer = Outer::new(&inner as &Inner);
  38     outer.inner.print();
  39 }
  40
  41
  42 // minimal
  43 pub trait MyTrait<T> {
  44     fn dummy(&self, t: T) -> T { panic!() }
  45 }
  46
  47 pub struct MyContainer<'a, T:'a> {
  48     foos: Vec<&'a (MyTrait<T>+'a)> ,
  49 }
  50
  51 impl<'a, T> MyContainer<'a, T> {
  52     pub fn add (&mut self, foo: &'a MyTrait<T>) {
  53         self.foos.push(foo);
  54     }
  55 }