KqueueSelector.swift - Fatal error: Unexpectedly found nil while unwrapping an Optional value

[amleszk]

KqueueSelector.swift
return Array(fileDescriptorIOEvents.map { (fileDescriptorMap[$0.0]!, $0.1) })

This happens quite frequently when debugging and a breakpoint is hit.

[dlevans2]

Tried applying the fix in PR 83 and that helps a bit, but still getting a SIGABRT intermittently in the same location. Seems to happen more now with Xcode 11.3.x than it did with Xcode 10.3