// MIR for `a::{closure#0}` 0 coroutine_resume
/* coroutine_layout = CoroutineLayout {
    field_tys: {},
    variant_fields: {
        Unresumed(0): [],
        Returned (1): [],
        Panicked (2): [],
    },
    storage_conflicts: BitMatrix(0x0) {},
} */

fn a::{closure#0}(_1: Pin<&mut {async fn body of a()}>, _2: &mut Context<'_>) -> Poll<()> {
    debug _task_context => _4;
    let mut _0: std::task::Poll<()>;
    let mut _3: ();
    let mut _4: &mut std::task::Context<'_>;
    let mut _5: u32;

    bb0: {
        _5 = discriminant((*(_1.0: &mut {async fn body of a()})));
        switchInt(move _5) -> [0: bb1, 1: bb4, otherwise: bb5];
    }

    bb1: {
        _4 = move _2;
        _3 = const ();
        goto -> bb3;
    }

    bb2: {
        _0 = Poll::<()>::Ready(move _3);
        discriminant((*(_1.0: &mut {async fn body of a()}))) = 1;
        return;
    }

    bb3: {
        goto -> bb2;
    }

    bb4: {
        assert(const false, "`async fn` resumed after completion") -> [success: bb4, unwind unreachable];
    }

    bb5: {
        unreachable;
    }
}