Players and mobs can fall through extending/retracting pistons
Player + retracting: http://i.imgur.com/MeZHz.gif
Mob + extending: http://i.imgur.com/2DarX.gif
Environment
Windows 7 64 bit, Java 7 (latest version)
Linked Issues
Lowis duplicated by9
MC-38207mobs getting stuck in pistons DuplicateMC-52281Yet another piston bugDuplicateMC-55310Player entity randomly falls when standing on moving blocksDuplicateMC-56320you can fall through extend piston if it extend to west and you walk west to east DuplicateMC-68512Non-player entities consistently fall through moving blocksDuplicateMC-73871You Fall Trough Moving Slime Block MachinesDuplicateMC-75574Mobs, boats and minecarts fall through moving slime blocksDuplicateMC-77789When you land on a slimeblock being rapidly moved by a piston, you will sometimes fall throughDuplicateMC-82548Sticky piston + Slime blockDuplicate
Created Issue:
Players and mobs can fall through extending/retracting pistons
Player + retracting: http://i.imgur.com/MeZHz.gif
Mob + extending: http://i.imgur.com/2DarX.gif
Environment
Windows 7 64 bit, Java 7 (latest version)
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![[Mod] CubeTheThird](../../../data/assets/gravatar/cubethethird.jpeg){kind=small}
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relates to
is duplicated by
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![[Mojang] Grum (Erik Broes)](../../../data/assets/gravatar/grum.png){kind=small}
[Mojang] Grum (Erik Broes)![[Mod] tryashtar](../../../data/avatars/users/41963.png){kind=small}
is cloned by
![[Bot] Arisa](../../../data/avatars/users/43007.png){kind=small}
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Probably MC-1230
This issue is a duplicate of MC-1230. It has been linked to the original bugreport.
Please search before reporting any bugs, as it's likely that one exists already.
I was making a slime block flying machine as others have done, and I wanted to make it ride-able. I put a boat on it. I expected the boat to go along in the machine. Instead, the boat fell through the slime blocks once the engine started(MC-1230), but then the boat is can not be interacted with(except removing the block beneath it results in it falling. Then after a certain amount of time, it deletes itself.
To reproduce:
1. Create a slime block "caterpillar engine"
2. Put a boat on the slime block.
3. Activate the engine, notice that the boat falls through the slime block.
4. Try to break the boat, get in the boat, or push the boat.
For the record, that's probably MC-1230.
Unfortunately based on word from [Mojang] Grum (Erik Broes) himself on MC-1230 this is now the intended functionality.
Things will not get pushed up when they get stuck in a block. They will prefer to fall down.
I think the current behaviour is at least predictable
I think I fixed this bug. I'll post the fix today in the morning (it's 1:40 AM now)
Fixed. [www.minecraftforum.net/topic/1543986-dievals-bugfixes-for-mojira/]
@DiEvAl So you don't work for Mojang and just made a mod? Is this actually going to get fixed?
Yes, I don't work for Mojang. Mojangsta have "[Mojang]" in front of their name.
I think it will be fixed eventually. It may take some time for mojang to see this bug though.
I tested your modification and it seems you only fixed mobs going through blocks. The main problem was having things fall through the wooden retracting/extending piston part.
Don't know about 1.6.4, but I can confirm 1.7.2 / launcher 1.2.8
Continued confirmation, 14w04a
Confirmed 1.7.5 with my accidental duplicate https://bugs.mojang.com/browse/MC-52281
Confirmed in 1.8.1-pre2.
http://gfycat.com/TatteredDeliciousDegu
This is because you can fall through block 36
This also affects slime blocks moving with the piston head, when the piston is extending down or horizontally or retracting in any direction. But since it doesn't affect solid blocks, I'd say the problem isn't that we can fall through block 36, but that we can also fall through TileEntity
{id:"Piston", blockId: minecraft:piston_head}and
{id:"Piston", blockId: minecraft:slime}Confirmed in 15w37a. Should be mentioned that it happens with any blocks being pushed by a piston, not just the arm.
This will be marked fixed in a snapshot near you soon.
Still happening in 15w38a..
Can confirm for player, but not for mobs.
I can also confirm for both plyer and skeleton (at least)
I'm not entirely convinced that the remaining issue is actually a bug. Previously, if an entity is standing on a block, and a piston pushes it, it falls through the piston to the block below it. Now, instead of falling all the way through, it falls onto the "neck" portion, which is solid. Upon retracting the block, the player/entity is inside it, since the block is taller than the "neck", causing them to fall through. The same behaviour can be observed if the player stands on a slab, and is pushed by a full block.
Things will not get pushed up when they get stuck in a block. They will prefer to fall down.
I think the current behaviour is at least predictable
It's still a problem for every block that moves before the mob takes notice. Mobs fall through retracting pistons; Mobs and players can be pushed into blocks that started moving earlier in the same tick.
still in 1.9.2
https://youtu.be/LK6rZLBWRUg
An_yMiner actually what you see there is
MC-89030user-f2760
MC-89030moves entities out of blocks, not into them.When retracting they do, see sethbling's video about it, this issue has been fixed, what you see is
MC-89030@sethbling's video: In order for a block to be able to be pushed the ones in front need to moved or destroyed. So when the piston extention gets pulled back, the piston base gets removed; Entities inside the extention are set infront of it. No surprise here.
What I'm complaining about is the behaviour of entities being moved into a position, where other blocks are:
Block started moving in tick t
when
MC-89030is fixed, and this is still an issue, then this will be reopened, not sooner as it's very likely the same issue as you experience@An_yMiner fixed in Minecraft 16w40a
I just found out that shifting floors work again. (Mobs fall through moving blocks; Players don't fall but have trouble moving)