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Vinícius Ferrão
22c26a5d57
ForkManager records a worker in run_on_start, which runs after the fork, so a signal arriving in between reached a handler that did not know the worker. Both worker pools now hold INT, TERM and HUP across start() and release them once the parent has the pid. The wait for a free slot happens before the mask is taken, or a cancellation would stay pending for as long as the pool is full. With a single worker ForkManager does not fork at all, so only a real child drops the inherited forwarder, whose copy names siblings the parent already signals.