// run-pass #![allow(unused_variables)] // pretty-expanded FIXME #23616 use std::default::Default; struct X { pub x: usize } impl Default for X { fn default() -> X { X { x: 42 } } } struct Y<T> { pub y: T } impl<T: Default> Default for Y<T> { fn default() -> Y<T> { Y { y: Default::default() } } } fn main() { let X { x: _ } = Default::default(); let Y { y: X { x } } = Default::default(); }