Daniel Mayer

I still do have the problem (also Ubuntu 18.04.5 LTS (GNU/Linux 4.15.0 x86_64)). 
I was able to find a way to reproduce the bug. 
Server crashes when i tab out of minecraft on win 10. 

I have the exact same problem, server starts and crashes after some time ( seemingly random, from seconds to minutes). Fresh install didn't fix the issue.

Version: 1.16.201.2
OS: Linux
Server start: 2020-12-21 20:04:54 CET
Dmp timestamp: 2020-12-21 20:05:42 CET
Upload Date: 2020-12-21 20:05:42 CET
Session ID: bdb2cb23-4434-43ea-9406-64ab616e789b
Commit hash:
Build id: development
CrashReporter Key: 8c4937c1-64cb-3532-a8dc-1deb28f67293

Crash
[INFO] at std::_shared_count<[__gnu_cxx::_Lock_policy]2>::shared_count[std::_weak_count<[__gnu_cxx::_Lock_policy]2> const&, std::nothrow_t] (UnknownFile:?)
at std::_shared_ptr<POIInstance, [__gnu_cxx::_Lock_policy]2>::shared_ptr[std::_weak_ptr<POIInstance, [__gnu_cxx::_Lock_policy]2> const&, std::nothrow_t] (UnknownFile:?)
at std::shared_ptr<POIInstance>::shared_ptr[std::weak_ptr<POIInstance> const&, std::nothrow_t] (UnknownFile:?)
at std::weak_ptr<POIInstance>::lock[] const (UnknownFile:?)
at Village::getBedPOICount[] const (UnknownFile:?)
at Village::tick[Tick, BlockSource&] (UnknownFile:?)
at VillageManager::tickVillages[Tick const&, Vec3 const&, BlockSource&] (UnknownFile:?)
at ServerPlayer::tickWorld[Tick const&] (UnknownFile:?)
at std::function<bool [Player&]>::operator[][Player&] const (UnknownFile:?)
at Level::forEachPlayer[std::function<bool [Player&]>] (UnknownFile:?)
at Level::tick[] (UnknownFile:?)
at ServerLevel::tick[] (UnknownFile:?)
at GameSession::tick[] (UnknownFile:?)
at Minecraft::tickSimtime[int, int] (UnknownFile:?)
at Minecraft::update[] (UnknownFile:?)
at ServerInstance::_update[] (UnknownFile:?)
at clone (UnknownFile:?)