// MIR for `hey` after built

fn hey(_1: &[T]) -> () {
    debug it => _1;
    let mut _0: ();
    let mut _2: &<[T] as std::ops::Index<usize>>::Output;
    let _3: &<[T] as std::ops::Index<usize>>::Output;
    let mut _4: &[T];
    scope 1 {
    }

    bb0: {
        StorageLive(_2);
        StorageLive(_3);
        StorageLive(_4);
        _4 = &(*_1);
        _3 = <[T] as Index<usize>>::index(move _4, const 0_usize) -> [return: bb1, unwind: bb4];
    }

    bb1: {
        StorageDead(_4);
        _2 = &(*_3);
        PlaceMention(_2);
        StorageDead(_2);
        _0 = const ();
        StorageDead(_3);
        return;
    }

    bb2: {
        FakeRead(ForMatchedPlace(None), _2);
        unreachable;
    }

    bb3: {
        goto -> bb2;
    }

    bb4 (cleanup): {
        resume;
    }
}