[jayd16]

Sounds like the Abro runtime never resumes the tasks so how could they throw?

[rexpan]

These 3 functions will stop on `await event.xxx` (if not, they will continue to execute or terminate). So when one of the functions is terminate https://github.com/pdubroy/handling-user-input/blob/main/abr...

   await Promise.any(fibers.map((f) => f.run()));
   fibers.forEach((f) => f.terminate());

Abro will reject the promise of these `await event.xxx` https://github.com/pdubroy/handling-user-input/blob/main/abr...

    this._promises.forEach(({ reject }) => reject());

Which will throw an Exception and exit the 2 other functions.

[ianbicking]

Oh... on second thought I realize the exception would have to come from `event.pointermove` (for example), and that object doesn't know anything about the receiver or whether it should cancel. So yeah, this does seem problematic.

[jayd16]

Are you worried about when the case when an exception should be thrown from the thing being awaited? I'm not familiar with Arbo but usually the promise holds on to the exception until its observed. It could be that Arbo is configured to ignore the exception if the task is already cancelled.