Crash
[2020-01-06 17:46:12 INFO]      at Actor::getLevel[] (UnknownFile:?)
        at GrassBlock::onFertilized[BlockSource&, BlockPos const&, Actor*, FertilizerType] const (UnknownFile:?)
        at Block::onFertilized[BlockSource&, BlockPos const&, Actor*, FertilizerType] const (UnknownFile:?)
        at FertilizerItem::dispense[BlockSource&, Container&, int, Vec3 const&, unsigned char] const (UnknownFile:?)
        at DyePowderItem::dispense[BlockSource&, Container&, int, Vec3 const&, unsigned char] const (UnknownFile:?)
        at DispenserBlock::dispenseFrom[BlockSource&, BlockPos const&] const (UnknownFile:?)
        at DispenserBlock::tick[BlockSource&, BlockPos const&, Random&] const (UnknownFile:?)
        at Block::tick[BlockSource&, BlockPos const&, Random&] const (UnknownFile:?)
        at BlockTickingQueue::tickPendingTicks[BlockSource&, Tick const&, int, bool] (UnknownFile:?)
        at LevelChunk::tick[BlockSource&, Tick const&] (UnknownFile:?)
        at Player::tickWorld[Tick const&] (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:?)