// MIR for `b` after Inline

fn b(_1: &mut Box<T>) -> &mut T {
    debug x => _1;
    let mut _0: &mut T;
    let mut _2: &mut T;
    let mut _3: &mut T;
    let mut _4: &mut std::boxed::Box<T>;
    scope 1 (inlined <Box<T> as AsMut<T>>::as_mut) {
        debug self => _4;
        let mut _5: std::boxed::Box<T>;
        let mut _6: *const T;
    }

    bb0: {
        StorageLive(_2);
        StorageLive(_3);
        StorageLive(_4);
        _4 = &mut (*_1);
        _5 = deref_copy (*_4);
        _6 = (((_5.0: std::ptr::Unique<T>).0: std::ptr::NonNull<T>).0: *const T);
        _3 = &mut (*_6);
        _2 = &mut (*_3);
        StorageDead(_4);
        _0 = &mut (*_2);
        StorageDead(_3);
        StorageDead(_2);
        return;
    }
}