Mafrans
Veteran Member
We assholes need to stick together, if you're a fellow asshole please pm me.
Posts: 1,760
| Likes: 1,703
|
Post by Mafrans on Apr 19, 2018 6:46:03 GMT
So I'll be doing research on crash chunks and what causes them and I decided to make this thread about it.
If you have any useful information about the cause of crash chunks, please send it to me.
This can be via PM or via discord, it does not have to be on the forum and will be completely anonymous.
Thank you for your future cooperation.
~~Mafrans
|
|
StevenNL2000
Forum Admin 
Posts: 6,415
| Likes: 6,936
IGN: StevenNL2000
Timezone: UTC+01:00
Member is Staff. Need immediate assistance? Send a PM
|
Post by StevenNL2000 on Apr 19, 2018 14:07:29 GMT
One of the first things is to not call them crash chunks, because that's just a term someone made up that everyone started using and that isn't remotely accurate in 99% of the cases. The category of issues we call crash chunks are entities or block entities that had their NBT modified in such a way that vanilla clients receiving the data will get disconnected or disconnect themselves from the server.
On the other side, exploits that cause actual crashes (read: you have to start the game back up through the launcher) usually have a higher priority.
|
|
|
|
Post by Stampeding//Egg on Apr 20, 2018 19:21:03 GMT
 These machines cause crash chunks due to the items inside the shulkers. If you want a copy of the item, ask Frosteed, Panther or VideoGameSmash |
|
kunochan
Veteran Member
Posts: 407
| Likes: 123
|
Post by kunochan on Apr 21, 2018 3:58:39 GMT
I know EXACTLY what caused the crash chunks.
Player "X" Placed a shulker box containing a Potion with a massive ammount of effects on it, causing the player who opens the shulker to crash (kicked).
Player "X" now place a shulker on top of a dropper, and put a dispenser under the dropper, wind it up with some observers, and flick the lever. Potions will be launched out, and whoever see's/pick the potions up WILL CRASH.
This will not be patched until we disable NBT+ from hotbars, since we can bring things from somewhere else into the server.
|
|
Mafrans
Veteran Member
We assholes need to stick together, if you're a fellow asshole please pm me.
Posts: 1,760
| Likes: 1,703
|
Post by Mafrans on Apr 21, 2018 9:33:40 GMT
Thanks for all the information, I do believe I have a clue on where to start.
I will be doing research on my own for now, though I will need someone to help testing later.
|
|
|
|
Post by Stampeding//Egg on Apr 21, 2018 10:06:01 GMT
And by the way, the shulkers don't crash you on single player.
|
|
kunochan
Veteran Member
Posts: 407
| Likes: 123
|
Post by kunochan on Apr 21, 2018 10:12:37 GMT
And by the way, the shulkers don't crash you on single player. They do. If your world is big enough, and has more data to save, having this shulker OR placing it down will potentially corrupt your world. I lost my world because of this. It makes any changes to the world unsavable. Meaning you cannot save anything. |
|
|
|
Post by Stampeding//Egg on Apr 21, 2018 12:05:49 GMT
They don't I tried them myself in single player. I managed to extract the potion from the box too, it seems they contain a corrupted potion id, effect and duration.
|
|
Mafrans
Veteran Member
We assholes need to stick together, if you're a fellow asshole please pm me.
Posts: 1,760
| Likes: 1,703
|
Post by Mafrans on Apr 22, 2018 9:57:21 GMT
One of the first things is to not call them crash chunks, because that's just a term someone made up that everyone started using and that isn't remotely accurate in 99% of the cases. The category of issues we call crash chunks are entities or block entities that had their NBT modified in such a way that vanilla clients receiving the data will get disconnected or disconnect themselves from the server. On the other side, exploits that cause actual crashes (read: you have to start the game back up through the launcher) usually have a higher priority. I agree, however, "crash chunks" is the most recognized name of this phenomena, and calling them something else may stir confusion. |
|
|
|
Post by therickpower978 on Apr 28, 2018 13:04:34 GMT
2 days ago and yesterday I analized crash chests and shulker boxes and I found the nbt tag that causes them to behave like that. PM me to know it admins (it's dangerous to put it here)
Edit: Yes, that tag works also with entities if put in the right way, so it's what may cause crash chunks (maybe by putting the data into an egg from a singleplayer world and transfering it here)
Edit 2: Dispensing/dropping the item will make a crash chunk, too (only by dispensers/droppers)
|
|
Premintex
Club 4000 Member
Coward
Posts: 5,408
| Likes: 2,485
|
Post by Premintex on Apr 28, 2018 14:13:52 GMT
One of the first things is to not call them crash chunks, because that's just a term someone made up that everyone started using and that isn't remotely accurate in 99% of the cases. The category of issues we call crash chunks are entities or block entities that had their NBT modified in such a way that vanilla clients receiving the data will get disconnected or disconnect themselves from the server. On the other side, exploits that cause actual crashes (read: you have to start the game back up through the launcher) usually have a higher priority. I agree, however, "crash chunks" is the most recognized name of this phenomena, and calling them something else may stir confusion. Crash items |
|
|
|
Post by therickpower978 on Apr 28, 2018 16:40:10 GMT
I know EXACTLY what caused the crash chunks. Player "X" Placed a shulker box containing a Potion with a massive ammount of effects on it, causing the player who opens the shulker to crash (kicked). Player "X" now place a shulker on top of a dropper, and put a dispenser under the dropper, wind it up with some observers, and flick the lever. Potions will be launched out, and whoever see's/pick the potions up WILL CRASH. This will not be patched until we disable NBT+ from hotbars, since we can bring things from somewhere else into the server. it's not exactly like that, the potion doesn't have a massive amount of effects, but it has an invalid effect tag on it, and there's something to do with viaversion to patch it (I think ViaVersion tries to translate the nbt tag to the version and as it is not valid ends up in glitching the tag and make you get kicked, so a fix would be to make it handle the invalid effect or the fix you said above). If that still doesn't fix it, the only fix would be the one you said above. |
|
kunochan
Veteran Member
Posts: 407
| Likes: 123
|
Post by kunochan on Apr 28, 2018 17:05:49 GMT
I know EXACTLY what caused the crash chunks. Player "X" Placed a shulker box containing a Potion with a massive ammount of effects on it, causing the player who opens the shulker to crash (kicked). Player "X" now place a shulker on top of a dropper, and put a dispenser under the dropper, wind it up with some observers, and flick the lever. Potions will be launched out, and whoever see's/pick the potions up WILL CRASH. This will not be patched until we disable NBT+ from hotbars, since we can bring things from somewhere else into the server. it's not exactly like that, the potion doesn't have a massive amount of effects, but it has an invalid effect tag on it, and there's something to do with viaversion to patch it (I think ViaVersion tries to translate the nbt tag to the version and as it is not valid ends up in glitching the tag and make you get kicked, so a fix would be to make it handle the invalid effect or the fix you said above). If that still doesn't fix it, the only fix would be the one you said above. No, it DOES have a massive amount of effects, causing the automatic potion color generating go wild, which makes the potion corrupted. I have the command to make a crash shulker, so I know well about it. |
|
