Is this a bug report?

Yes

Have you read the Contributing Guidelines?

Yes

Environment

react-native 0.47.2

Steps to Reproduce

1. Schedule a long-running promise task with InteractionManager.runAfterInteractions

    const promise = InteractionManager.runAfterInteractions({
      gen: () => {
        // do a long fetch and return a promise
      }
    });

2. After the task has started but before it is done, cancel the task

    promise.cancel()

3. When the task completes TaskQueue will throw an exception

    TaskQueue: Error resolving Promise in task undefined: undefined is not an object (evaluating '_this2._queueStack[stackIdx].popable = true')

Expected Behavior

No error would be thrown. InteractionManager (TaskQueue) would ignore the completion of a cancelled task and start the next task.

Actual Behavior

Error was thrown from TaskQueue line 158:

iOS: TaskQueue: Error resolving Promise in task undefined: undefined is not an object (evaluating '_this2._queueStack[stackIdx].popable = true')

Android: TaskQueue: Error resolving Promise in task undefined: Attempted to assign to readonly property.

Reproducible Demo

https://snack.expo.io/HJivJZ33-