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#![feature(rustc_attrs)]
// This test checks that a warning occurs with migrate mode.
#[rustc_error]
fn main() {
//~^ ERROR compilation successful
let mut x = 0;
|| {
|| {
//~^ WARNING captured variable cannot escape `FnMut` closure body
//~| WARNING this error has been downgraded to a warning
//~| WARNING this warning will become a hard error in the future
let _y = &mut x;
}
};
}
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