I have a switch on a dispenser under a grass block testing new flower mechanics. Is a single player creative world. If I click multiple times in short succession, the client crashes.
I have been able to repeat this several times. Location of dispenser is 83x, 168z in the attached world. If a switch is attached to it and you click it fast, the world crashes.
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Update V2. This does not appear to have anything to do with switches, but instead with fertilizing grass blocks with a dispenser. I was trying to do a compare between traditional flower farm, which fertilizes with bonemeal in dispensers from below, and the new mechanic where you fertilize the flowers directly. I turned on the farm, and it crashed our server immediately. It is now stuck on and I cannot get back in without crashing our server.
Here is the output from the crash:
Build id: development CrashReporter Key: e85869ea-2546-3ff2-8d23-a02d2543a715 Crash [2019-11-04 20:25:05 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:?) <?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd%22%3E <plist version="1.0"> <dict> <key>id</key> <string>0</string> <key>delay</key> <integer>0</integer> <key>status</key> <integer>0</integer> </dict> </plist>
The following bugs are all related to this one:
https://bugs.mojang.com/browse/MCPE-54776
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Further testing shows that fast clicking is not really required to reproduce this bug. Not sure on the reason, but I clicked 2 times more than a second apart and it also crashed.