Explain queue get behavior of other task siblings when cancelling parent nursery

test-racers.py

import trio,itertools
count = itertools.count()

async def q_get(nurs,q,container):
    container.append(await q.get())
    nurs.cancel_scope.cancel()

async def q_putall(q1,q2):
    q1.put_nowait(next(count))
    q2.put_nowait(next(count))

async def main_async_q():
    open_nursery = trio.open_nursery
    results = []
    q1 = trio.Queue(10)
    q2 = trio.Queue(10)
    async with open_nursery() as nurs:
        nurs.spawn(q_get, nurs, q1, results)
        nurs.spawn(q_get, nurs, q2, results)
        nurs.spawn(q_putall,q1,q2)
    print(f"results (should be 1 in length but actually has BOTH results??): {results}")

def main_sync():
    run = trio.run
    run(main_async_q)

if __name__ == '__main__':
    main_sync()