src/test/ui/pattern/bindings-after-at/borrowck-pat-by-move-and-ref-inverse-promotion.rs

// Test that `by_move_binding @ pat_with_by_ref_bindings` is prevented even with promotion.
// Currently this logic exists in THIR match checking as opposed to borrowck.

#![feature(bindings_after_at)]

fn main() {
    struct U;
    let a @ ref b = U; //~ ERROR borrow of moved value
}