I've seen this a few times on and off

https://chromium-swarm.appspot.com/task?id=3eccc0d659a47b10&refresh=10&show_raw=1&wide_logs=true is an example of this.

As I'm writing this, it's state is "RUNNING", but the following annotations are at the bottom of the page:

  substep: <
    step: <
      name: "recipe result"
      status: SUCCESS
      started: <
        seconds: 1532032133
        nanos: 668015800
      >
      ended: <
        seconds: 1532032133
        nanos: 674800300
      >
      other_links: <
        label: "result"
        logdog_stream: <
          name: "steps/recipe_result/0/logs/result/0"
        >
      >
    >
  >
  stdout_stream: <
    name: "stdout"
  >
  started: <
    seconds: 1532027200
    nanos: 472249700
  >
  ended: <
    seconds: 1532032134
    nanos: 45378300
  >
>
annotation_url: "logdog://logs.chromium.org/chromium/buildbucket/cr-buildbucket.appspot.com/8940546805169322656/+/annotations"
recipe: <
  name: "chromium_trybot"
>

Which seems to suggest that the task is complete. Is swarming doing something still? It doesn't have an isolated output as far as I know...

I don't know if it's possible to see this in tasks that have completed