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Trello: https://trello.com/c/95HRjhQa
boost::signals2
. The shutdown signal wasn't required in the first place, since under highload system will reuse fds fast enough to replace stale sessions in the engine's map, and for quiet times engines will now garbage collect stale sessions every 60 seconds.uncaught_error
without any details about what error was not actually caught.discard()
call may or may not be accompanied bystd::error_code
.