Reset blocked operations after fork - #463
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Async scheduler state is copied into a forked child, but the fibers represented by
@blockedare not. Reset the inherited counter before detaching the child scheduler soScheduler#closedoes not raiseClosing scheduler with blocked operations!.This was exposed by socketry/async-container#76 when moving
Process.forkfrom a separate native thread to a clean fiber.Adds a regression test that forks while another fiber is blocked in
Thread::Queue#pop.