lib/puma/server.rb [241:261]:
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                  end
                rescue SystemCallError
                  # nothing
                rescue Errno::ECONNABORTED
                  # client closed the socket even before accept
                  begin
                    io.close
                  rescue
                    Thread.current.purge_interrupt_queue if Thread.current.respond_to? :purge_interrupt_queue
                  end
                end
              end
            end
          rescue Object => e
            @events.unknown_error self, e, "Listen loop"
          end
        end

        @events.fire :state, @status

        graceful_shutdown if @status == :stop || @status == :restart
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lib/puma/server.rb [411:431]:
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                  end
                rescue SystemCallError
                  # nothing
                rescue Errno::ECONNABORTED
                  # client closed the socket even before accept
                  begin
                    io.close
                  rescue
                    Thread.current.purge_interrupt_queue if Thread.current.respond_to? :purge_interrupt_queue
                  end
                end
              end
            end
          rescue Object => e
            @events.unknown_error self, e, "Listen loop"
          end
        end

        @events.fire :state, @status

        graceful_shutdown if @status == :stop || @status == :restart
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -