src/test/ui/issues/issue-39292.rs

   1 // run-pass
   2 // Regression test for issue #39292. The object vtable was being
   3 // incorrectly left with a null pointer.
   4
   5 trait Foo<T> {
   6     fn print<'a>(&'a self) where T: 'a { println!("foo"); }
   7 }
   8
   9 impl<'a> Foo<&'a ()> for () { }
  10
  11 trait Bar: for<'a> Foo<&'a ()> { }
  12
  13 impl Bar for () {}
  14
  15 fn main() {
  16     (&() as &dyn Bar).print(); // Segfault
  17 }