For some reason, item frames seem to duplicate upon logging off and back in. However, it doesn't seem to duplicate for every world. It may have something to do with the superflat preset I was using. For reference, the preset I used was:
2;7,60x1,5x3,2;3;
It was creative mode with generate structures set to off.
Steps to reproduce:
1. Place an item frame on a block, and put an item in the item frame
2. Save & quit to file
3. Load the world back up
4. Hit f3 and notice the extremely high entity count
5. Break the block that the item frame is on
6. When the item frame breaks, it will drop a lot of item frames as well as the item that was put inside of it (764 to be exact)
Related issues
is duplicated by
MC-54264
Item frame bug
MC-54336
Item Frame and Item's in Frame Duplication
MC-54650
Entity overflow from item frames
MC-55621
When I open my world item frames and there contents are repeatedly spawn on the floor
MC-56343
Dupe Glitch (all snapshots from 14w11b)
MC-56851
Spawned in with a million baby cows when I didn't bread them and items everywhere
MC-58569
item in item frame duplicated (vanilla server)
MC-58991
infinite fish and item frames in creative
MC-59089
Duplicate items with item frame
MC-59441
Item Frames
MC-59496
Duplication - Item Frame / Compactor
relates to
Attachments
Comments
migrated
migrated
Not a dupe bug.
migrated
This bug isn't the same as MC-2605; with this bug, the item frame is being duplicated over 700 times upon quitting and logging back into the world. Only one item frame was placed initially (as you can see by watching the gif). This is a serious bug that needs to be fixed before the 1.8 release.
migrated
Was able to reproduce. definitely not a copy of MC-2605
did exactly like you and ended up with 8 stacks +45 items of stone and the same amount of frames
seems to be specific to the preset world
migrated
I too can confirm that this is happening, I've experienced it with multiple flatworld presets. This is not related to the bug that this has been set as a duplicate of. That must have been an oversight, please re-open this bug. Thanks.
migrated
I have a build with item frames that crosses over the z=0 line. Item frames on the South of z=0 are fine, but item frames on the north of the line bug out as described here. Odd, considering the build is otherwise perfectly symmeterical.
I was also in a superflat world that just generated a single layer of air.
kumasasa
Not a duplicate of MC-2605
migrated
Still a problem in Snapshot 14w18b
kumasasa
Related to MC-51610
migrated
Still a bug in 14w19a
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This is still a bug in 14w20b and it is very annoying. A villager had also been cloned many times. however when is used mcedit to paste a part of my flat world in a normal world the bug didnt appear.
marcono1234
Confirmed for 14w26b
From MC-59089:
1. Find a chunk border south.
2. Make a 2 block high tower (any block).
3. Inside the chunk behind the 2 block tower set 1 block.
4. On that block you set a comparator to point north.
5. Set a item frame 2 blocks south of the comparator.
6. Put you preffered item in the item frame.
7. Stand inside the chunk.
8. Log out and in.
9. Wupti a little lag and the items appear.
Caused by:
[23:51:30 INFO]: Client> [23:51:28] [Server thread/ERROR]: Couldn't load chunk
[23:51:30 INFO]: Client> u: Loading entity NBT
...
[23:51:30 INFO]: Client> Caused by: java.lang.StackOverflowError
migrated
Confirmed for snapshot 14w28a.
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Confirmed for snapshot 14w28b.
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Confirmed for snapshot 14w30c, I can supply a world file if necessary. It is huge and I would need instructions on where to post it in that case.
migrated
Stumbled upon a video demonstrating this bug here: https://www.youtube.com/watch?v=iq2Rg_SAOGQ
According to the video's creator it occurs on chunk boundaries. You can see him demonstrate the glitch with the item frame entity and mobs.
migrated
so it's resolved now?
migrated
Tried testing this in 14w26c, but the world won't load. I think I triggered this bug and a similar one. Minecraft not doing much for a while now.
migrated
deleting world file. MC stopped responding after I tried to close it. I guess this is the big reason it needed to get removed. It could corrupt save files (or at least make them hard to open without a beefy computer). Definitely glad I didn't test this on a friend's server. He would've killed me!(i've crashed it about 3 times in the past 2 months)
kumasasa
Can no longer confirm this in 1.8 or 1.8.1-pre3.
There are no new reports of this kind in the bug tracker indicating that versions > 14w30 are affected.