Attempt to cancel a job raises error

[cqc-alec]

Describe the bug
Calling cancel() on an AwsQuantumTask in the "QUEUED" state raises a RuntimeError.

To reproduce

from braket.aws import AwsDevice
from braket.circuits import Circuit
from braket.devices import Devices

device = AwsDevice(Devices.IonQ.Forte1)

bell = Circuit().h(0).cnot(0, 1)
task = device.run(bell)
task.cancel()

This raises:

RuntimeError: There is no current event loop in thread 'MainThread'.

The job is not cancelled.

Expected behavior
The task should be cancelled, with no error.

[rmshaffer]

Thanks for reporting this, @cqc-alec. Could you verify the Python version you're using?

I've opened a draft PR #1306 which may fix this issue - if you're able to try it out, it would be great to know whether it fixes your issue.

[cqc-alec]

Thanks for reporting this, @cqc-alec. Could you verify the Python version you're using?

Python 3.14.

I've opened a draft PR #1306 which may fix this issue - if you're able to try it out, it would be great to know whether it fixes your issue.

Yes, this patch does fix it. Thanks for the quick response!

[rmshaffer]

Thanks for confirming so quickly!

Python 3.14 isn't officially in our supported versions list yet, but since this is an issue that can actually be hit in earlier Python versions as well, I think we'll go ahead with the fix.