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Bug
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Resolution: Unresolved
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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, 21w11a, 21w14a, 21w19a, 1.17, 1.17.1 Pre-release 1, 1.17.1, 1.18.1, 22w03a, 1.19, 1.19.2, 1.19.3, 23w03a, 23w04a, 1.19.4 Pre-release 4, 1.19.4 Release Candidate 2, 1.19.4, 23w18a, 1.20 Pre-release 5, 1.20, 1.20.1, 23w32a, 1.20.2, 1.20.5, 1.20.6, 1.21 Pre-Release 4, 1.21
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Confirmed
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Player
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Normal
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Platform
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Video demonstrating the issue (potentially outdated regarding reproduction): https://youtu.be/0RYRj5XN8vk?t=25s
- 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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MC-229166 Duping-Bug (Items, XP)
- Resolved
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MC-229571 World Optimization is producing strange results
- Resolved
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MC-232140 Duplication glitch involving restarting device
- Resolved
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MC-234631 minecraft duplication glitch
- Resolved
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MC-238666 Duplication glitch/Cancel death on Hardcore (without a totem of undying)
- Resolved
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MC-238690 Infinate respawn glitch for hardcore minecraft
- Resolved
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MC-239150 OP Duplication Glitch
- Resolved
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MC-242889 Item duplication bug
- Resolved
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MC-247439 Player and world data aren't autosaved in sync, causing item loss or duplication
- Resolved
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MC-248312 Items get duplicated after game crash
- Resolved
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MC-253386 duplication
- Resolved
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MC-253927 item dupe bug
- Resolved
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MC-255043 If game crashes after putting items in a chest when re-opening the world the items duplicate
- Resolved
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MC-256355 A duplication glitch.
- Resolved
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MC-258946 A bug with the possibility of a dupe, or loss of resources.
- Resolved
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MC-259031 New found Duplication Glitch 1.19,3
- Resolved
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MC-260843 Items will dupe on Task Manager exit.
- Resolved
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MC-260928 The game doesn't autosave world data and player data at the same time
- Resolved
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MC-262457 Closing the game in an unsaved world can cause items put in a container to be duplicated and items taken out of a container to be deleted.
- Resolved
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MC-262558 Duplication bug?
- Resolved
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MC-262937 Death Dupe Glitch
- Resolved
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MC-263566 Infinite netherite
- Resolved
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MC-263647 Duplication of items after death.
- Resolved
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MC-263749 A dupe item glitch
- Resolved
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MC-265991 Items disappear if game crashes/freezes when chest/barrel is open (inventory screen and storage screen are both open)
- Resolved
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MC-273123 Ability to dupe certain items and even delete them forever
- Resolved
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MC-273643 Duplication of inventory using chests and/or barrels
- Resolved
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MC-273980 The Dark Chunk Bug
- Resolved
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MC-274838 Dupplication Glitch! Items in the chest and in the Inventroy and the same time!
- 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