my server crashed after I've logged out from the game. Running on Ubuntu 16.04.2 LTS (GNU/Linux 4.4.0-72-generic x86_64)
I tried to re-produce it, but it seems infrequent. No mods are installed.
The map is new and was created with 0.15.0 by using the --create command on the server console with default settings.
45223.143 Info ServerMultiplayerManager.cpp:846: Disconnect notification for peer (3)
45223.143 Info ServerMultiplayerManager.cpp:747: mapTick(1404064) received stateChanged peerID(3) oldState(InGame) newState(DisconnectScheduled)
45223.160 Info ServerSynchronizer.cpp:537: nextHeartbeatSequenceNumber(1336488) removing peer(3).
Factorio crashed. Generating symbolized stacktrace, please wait ...
50331.047 Warning Logger.cpp:386: Symbols.size() == 18, usedSize == 8
#0 0x0000000000a918fd in Logger::logStacktrace(StackTraceInfo*) at /tmp/factorio-vkXRRs/src/Util/Logger.cpp:408
#1 0x0000000000bbe779 in NetworkModStartupSetting::NetworkModStartupSetting(Deserialiser&) at /tmp/factorio-vkXRRs/src/Net/NetworkMessages.cpp:78
#2 0x0000000000dd31bc in load at /tmp/factorio-vkXRRs/src/Util/Deserialiser.hpp:67
#3 0x0000000000dd3e26 in load at /tmp/factorio-vkXRRs/src/Util/Deserialiser.hpp:98
#4 0x0000000000dd5141 in operator>><std::vector<NetworkModStartupSetting> > at /tmp/factorio-vkXRRs/src/Util/Deserialiser.hpp:178
#5 0x0000000000e8f553 in ConnectionRequestReplyConfirmMessage::ConnectionRequestReplyConfirmMessage(Deserialiser&, ServerRouter const*) at /tmp/factorio-vkXRRs/src/Net/NetworkMessages.cpp:201
#6 0x00007fb17d508830 in parse<ConnectionRequestReplyConfirmMessage, ServerRouter*> at /tmp/factorio-vkXRRs/src/Net/UnparsedNetworkMessage.hpp:33
#7 0x0000000000406d69 in update at /tmp/factorio-vkXRRs/src/Net/ServerRouter.cpp:116
50331.706 Warning Logger.cpp:386: Symbols.size() == 17, usedSize == 7
50331.706 Error NetworkMessages.cpp:78: Loaded setting is nullptr.
Logger::writeStacktrace skipped.
50331.706 Error CrashHandler.cpp:106: Map tick at moment of crash: 1404066