Details
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Type:
Bug
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Status: Reopened
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Resolution: Unresolved
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Affects Version/s: Minecraft 1.4.1, Snapshot 13w19a, Snapshot 13w21a, Minecraft 1.8.8, Minecraft 16w02a, Minecraft 1.9, Minecraft 1.9.1 Pre-Release 1, Minecraft 1.9.4, Minecraft 16w20a, Minecraft 1.11, Minecraft 16w50a, Minecraft 1.11.2, Minecraft 17w17a, Minecraft 17w17b, Minecraft 1.12.1, Minecraft 1.12.2, Minecraft 18w15a, Minecraft 1.13-pre1, Minecraft 1.13-pre2, Minecraft 1.13.2, 1.14.4, 1.15.2, 1.16.1, 1.16.2, 1.16.3, 1.16.4, 20w45a, 1.16.5, 21w06a, 21w07a, 21w08b
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Fix Version/s: Minecraft 1.4.5
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Labels:
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Confirmation Status:Confirmed
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Category:Player
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Mojang Priority:Normal
Description
The bug
Due to player data and region files not written to disk simultaneously, items can be duplicated quite easy under certain conditions. As of 1.16, Minecraft can be configured to run in synchronous disk i/o mode, making this issue more obvious and easier to reproduce.
How to reproduce
- Make sure syncChunkWrites in options.txt is set to true
- Create a world and fill your inventory with things
- Leave the world to make sure player data gets written to disk
- Rejoin the world
- Die
- Forcefully terminate minecraft's java process (Taskmanager, /taskkill, ...)
- Rejoin the world
→Notice things you've collected now appear on the ground and in your inventory
Video demonstrating the issue (potentially outdated regarding reproduction): https://youtu.be/0RYRj5XN8vk?t=25s
Attachments
Issue Links
- is duplicated by
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MC-16358 Item duplication bug
- Resolved
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MC-19596 duplicate bonus chest
- Resolved
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MC-24546 Dupe using a chest in Singleplayer
- Resolved
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MC-151328 Item duplication 1.14
- Resolved
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MC-154379 1.14.2 Item Dupe.
- Resolved
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MC-156609 duplicating items death glitch
- Resolved
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MC-158297 Dupe in 1.14.4 Involving opening one world in two instances at the same time
- Resolved
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MC-158465 Inventory duplication on player death
- Resolved
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MC-163997 Losing Chestplate during Power Outage
- Resolved
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MC-173045 Duping on Servers
- Resolved
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MC-191057 DUPE bug on single player TOO OP!! MUST PACH
- Resolved
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MC-191841 Minecraft brand new dupe bug
- Resolved
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MC-192430 Return Portal did not form in the Nether.
- Resolved
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MC-199863 Duplication Glitch using Crafting Tables
- Resolved
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MC-200526 Deleted Items in hand after crash
- Resolved
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MC-201728 dupe items issue
- Resolved
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MC-202060 If you open a crafting table and put items, game craft, boom items duped
- Resolved
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MC-202117 Duplication bug
- Resolved
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MC-205022 End City 20w45a bug
- Resolved
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MC-211909 Duplication Glitch
- Resolved
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MC-215198 transported to last location after dying and found the items I had already picked up and were currently in my inventory there at the location when I spawned in.
- Resolved
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MCL-16879 World saves changes but player dosen't.
- Resolved
- relates to
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MC-75330 Item duplication glitch
- Resolved
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MC-409 Worlds not saving upon exit (single player)
- Resolved
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MC-3728 Item Duplication Bug
- Resolved
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MC-4247 putting items in chests in singleplayer, then quitly logging out will make the chest items revert to the way they were before you opened the chest, but your inventory will stay the say, thus deleting items (if done in reverse items can be duplicated)
- Resolved