// edition:2021 #![feature(rustc_attrs)] struct Point { x: i32, y: i32, } fn main() { let mut p = Point { x: 10, y: 10 }; let c = #[rustc_capture_analysis] //~^ ERROR: attributes on expressions are experimental //~| NOTE: see issue #15701 //~| NOTE: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date || { //~^ First Pass analysis includes: //~| Min Capture analysis includes: println!("{}", p.x); //~^ NOTE: Capturing p[(0, 0)] -> ImmBorrow //~| NOTE: Min Capture p[(0, 0)] -> ImmBorrow }; // `c` should only capture `p.x`, therefore mutating `p.y` is allowed. let py = &mut p.y; c(); *py = 20; }