src/test/ui/issues/issue-6557.rs

// build-pass (FIXME(62277): could be check-pass?)
#![allow(dead_code)]
// pretty-expanded FIXME #23616

#![feature(box_patterns)]
#![feature(box_syntax)]

fn foo(box (_x, _y): Box<(isize, isize)>) {}

pub fn main() {}