// error-pattern: reached the recursion limit while auto-dereferencing #![feature(box_syntax)] use std::ops::Deref; struct Foo; impl Deref for Foo { type Target = Foo; fn deref(&self) -> &Foo { self } } pub fn main() { let mut x; loop { x = box x; x.foo; x.bar(); } Foo.foo; Foo.bar(); }