Kingfisher: Fatal Error in prefetcher

I use the ImagePrefetcher to cache photos before I need them, so I frequently start and stop 2 prefetchers with several photos.

I occasionally run into a problem: Fatal Error: Can’t form Range with end < start at this line in ImagePrefetcher.downloadAndCacheResource(resource: Resource):

let pendingResources = self.prefetchResources[self.requestedCount..<self.prefetchResources.count]

Is it that stop() was called on the prefetcher and a downloadTask is trying to stop itself, but it’s actually already done (e.g requestedCount == prefetchResources.count)?

(also thanks for making this library, aside from this crash, it’s great)