src/test/ui/pattern/bindings-after-at/nested-binding-mode-lint.rs

// check-pass

#![feature(bindings_after_at)]
#![deny(unused_mut)]

fn main() {
    let mut is_mut @ not_mut = 42;
    &mut is_mut;
    &not_mut;
    let not_mut @ mut is_mut = 42;
    &mut is_mut;
    &not_mut;
}