[MC-5998] Item duplication by using the hopper Created: 04/Jan/13  Updated: 07/Sep/15  Resolved: 05/Jan/13

Status: Closed
Project: Minecraft: Java Edition
Component/s: None
Affects Version/s: Snapshot 13w01b
Fix Version/s: Snapshot 13w02a

Type: Bug
Reporter: miguel Assignee: [Mojang] Nathan Adams
Resolution: Fixed Votes: 11
Labels: item

Attachments: Text File crash-2013-01-04_16.15.52-client.txt     PNG File javaw 2013-01-04 20-14-26-57.png     PNG File javaw 2013-01-04 20-14-33-12.png     PNG File javaw 2013-01-04 20-14-42-50.png    
Issue Links:
Duplicate
is duplicated by MC-5999 Item Duplication Hopper Resolved
is duplicated by MC-6000 hopper duplication items Resolved
is duplicated by MC-6003 hopper duplication glitch Resolved
is duplicated by MC-6004 Another dupe.... Resolved
is duplicated by MC-6006 Duplication machine with hopper. Resolved
is duplicated by MC-6007 Hopper duplication in 13w01b Resolved
is duplicated by MC-6012 items duplication Resolved
is duplicated by MC-6013 Hopper duplication bug Resolved
is duplicated by MC-6017 Hopper making duplicate items Resolved
is duplicated by MC-6026 Duplication of items dropped on the h... Resolved
is duplicated by MC-6027 Duplication(?) bug with hoppers Resolved
is duplicated by MC-6035 3=7 hopper Resolved
is duplicated by MC-6037 Items duped with hopper contraption Resolved
is duplicated by MC-6043 Hopper duplication Resolved
is duplicated by MC-6048 Diamonds Infinity Resolved
is duplicated by MC-6051 Hopper Dispenser Duplication Bug Resolved
is duplicated by MC-6054 Another kind? of hopper duplication g... Resolved
is duplicated by MC-6071 Hopper duplicating items Resolved
is duplicated by MC-6072 Item Hopper Duplication Glitch Resolved
is duplicated by MC-6075 Duplication glitch with hoppers Resolved
is duplicated by MC-6080 duplicating items in hopper Resolved
is duplicated by MC-6086 Minecraft Duplicate Items Resolved
is duplicated by MC-6106 duplicating items Resolved
is duplicated by MC-6117 Hopper infinite duplication bug Resolved
is duplicated by MC-6122 Hopper: item duplication Resolved
is duplicated by MC-6128 the hopper doubles objects sometimes Resolved
is duplicated by MC-6134 Reddit Clones Items Resolved
is duplicated by MC-6151 Duplication of items using hoppers Resolved
is duplicated by MC-6163 Hopper Duping items Resolved
is duplicated by MC-6164 Huge Duplicate Error With Hoppers In ... Resolved
is duplicated by MC-6170 Minecraft Hopper Glitch of 13w01b Resolved
is duplicated by MC-6172 Duplication Glitch/Boot glitch Resolved
is duplicated by MC-6174 Item duplication bug using hopper Resolved
is duplicated by MC-6175 Hopper Duping Glitch Resolved
is duplicated by MC-6177 Hopper can infinite duplicate. Resolved
is duplicated by MC-6180 Duplication Resolved
is duplicated by MC-6189 More obscure hopper duplication glitch Resolved
is duplicated by MC-6192 Hooper duplicates items/blocks Resolved
is duplicated by MC-6195 The hopper Resolved
is duplicated by MC-6196 Minecart shooting out of dispenser in... Resolved
is duplicated by MC-6197 Still bugs in Hoppers Resolved
is duplicated by MC-6199 Another duplication glitch with 2 hop... Resolved
is duplicated by MC-6206 Item Duplication Glitch Resolved
is duplicated by MC-6211 Dropping items on the edge of a hoppe... Resolved
is duplicated by MC-6212 Dupicating Hopper Resolved
is duplicated by MC-6216 Hopper Duplication Resolved
is duplicated by MC-6220 [IGNORE] Forgot to set search to non-... Resolved
is duplicated by MC-6224 duplicator Water Bottle Resolved
is duplicated by MC-6225 Hopper duplicates items thrown on its... Resolved
is duplicated by MC-6227 Items can get stuck in Hoppers Resolved
is duplicated by MC-6229 Hopper duplicate Resolved
is duplicated by MC-6252 In-Game Dupe Glitch Resolved
is duplicated by MC-6254 When item is on corner of hopper it c... Resolved
is duplicated by MC-6256 Duplication with multiple hoppers. Resolved
is duplicated by MC-6259 Hopper Duplication Glitch Resolved
is duplicated by MC-6274 Splash potion duplication using hoppers Resolved
is duplicated by MC-6294 Duplication bug with Redstone torch t... Resolved
is duplicated by MC-6296 Hopper chain item duplication Resolved
is duplicated by MC-6302 hopper duplicate bug Resolved
is duplicated by MC-6303 Throwing items in an Hopper will dup... Resolved
is duplicated by MC-6306 Item duplication with hoppers Resolved
is duplicated by MC-6310 Hopper duplication bug Resolved
is duplicated by MC-6317 Duplication bug using Hoppers Resolved
is duplicated by MC-6319 Hopper Glitch Resolved
is duplicated by MC-6322 Hopper duplicates items Resolved
is duplicated by MC-6332 Hopper duplicating every item Resolved
is duplicated by MC-6339 1.5 Hopper Glitch Resolved
is duplicated by MC-6358 Item Duplication in Hopper chains Resolved
is duplicated by MC-6375 Hopper Item Duplication When Items Th... Resolved
is duplicated by MC-6379 Half-slab over hopper infinite duplic... Resolved
is duplicated by MC-6388 Hopper duplication Resolved
is duplicated by MC-6405 Minecart duplication Resolved
is duplicated by MC-6408 Duplication items at throwing away fr... Resolved
is duplicated by MC-6410 Duplicating Resolved
is duplicated by MC-6424 Diamond generator Resolved
is duplicated by MC-6426 Hopper Duplication Glitch Resolved
is duplicated by MC-6429 Hopper Item Multiplication Resolved
is duplicated by MC-6439 Duplication glitch using the new Hopp... Resolved
is duplicated by MC-6444 Diamond duplication with WIPS Resolved
is duplicated by MC-6450 When you make a long chain of hoppers... Resolved
is duplicated by MC-6455 When using Ctrl + Q and dropping item... Resolved
is duplicated by MC-6464 Duplication using Hoppers and Brewing... Resolved
is duplicated by MC-6470 duplication gltch with hoppers Resolved
is duplicated by MC-6472 Dupe-Items Hopper Resolved
is duplicated by MC-6478 Throwing items (via Q) to hopper caus... Resolved
is duplicated by MC-6485 Item Duplication Resolved
is duplicated by MC-6503 bug with new item "wip" Resolved
is duplicated by MC-6508 item duplication Resolved
is duplicated by MC-6510 I found a bug, i can clone items whit... Resolved
is duplicated by MC-6526 Item caught on lip of hopper will som... Resolved
is duplicated by MC-6546 A Bug with the item WIP Resolved
is duplicated by MC-6548 Hopper Bug Resolved
is duplicated by MC-6558 Hoppers create infinite items and ghosts Resolved
is duplicated by MC-6605 Hopper - Unlimited Items Resolved
is duplicated by MC-6612 Duplication on funnel Resolved
is duplicated by MC-6615 Hopper item duplication bug Resolved
is duplicated by MC-6619 Hopper Duplication for Single Items T... Resolved
is duplicated by MC-6621 Hopper duplication Resolved
is duplicated by MC-6629 Placing a hopper on top of a dispense... Resolved
is duplicated by MC-6650 Item Duplication with Hopper Resolved
is duplicated by MC-6670 Duplication Glitch with Hoppers Resolved
is duplicated by MC-6676 When items flow through water into ho... Resolved
is duplicated by MC-6683 Bug with wip dupping Resolved
is duplicated by MC-6684 Items going in hopper become thrice o... Resolved
is duplicated by MC-6720 Minecart doesn't go in hopper and cau... Resolved
is duplicated by MC-6761 Redstone Duplication bug (Hopper) Resolved
CHK:
Confirmation Status: Confirmed

 Description   

There is a problem with the hopper. Ussualy it duplicates the clock item when you throw it in the hopper

Mod edit by Mustek

Clear details: Happens on all items that land on the edge of the hopper. It's not specific to clocks or hoppers on chests. This has been fixed for the next snapshot



 Comments   
Comment by Tails [ 26/Feb/14 ]

Nicolas Posocco, your bug is described in a private ticket, see comments above.

Closing, since this particular report was fixed ages ago.

Comment by Nicolas Posocco [ 25/Feb/14 ]

My report has just been declared "duplicated". It's NOT : This issue is declared "Fixed" and it's NOT. The same bug can be reproduced with All 1.8 snapshots. Thanks for really Reading the content of the reports, when the title clearly indicates an Error from the bug tracking. Good evening.

EDIT : Thanks for your answer Tails, I can't wait for this bug to be finally definitely fixed... Will this one be fixed for 1.8 ?

Comment by Jason Purslow [ 02/May/13 ]

@Justin Lawen @Tails : Thanks, the ticket is MC-15019.

Comment by Tails [ 02/May/13 ]

@Jason: I was able to reproduce, so please create a new private ticket for this bug.

Comment by Justin Lawen [ 02/May/13 ]

@Jason

I've been able to replicate this in 1.5.1, but I haven't tried the recent snapshots yet. This issue may require a new bug report, since it seems to be an issue unrelated to the current MC-5998.

Comment by mike [ 01/May/13 ]

So you were using 13w17a?

Comment by Jason Purslow [ 30/Apr/13 ]

I'm still able to reproduce it in the same way I described earlier under the latest snapshot. Though the result of the bug is the same, as I'm doing other things to produce it I suppose it may be a separate issue from the bug originally reported here.

Comment by mike [ 30/Apr/13 ]

This is no longer a problem with the more recent snapshots. If you do, however, find the bug to be occurring again, please say so. Otherwise, it has been fixed.

Comment by mike [ 09/Jan/13 ]

Also happens in 13w01b.

Comment by FireHunterX [ 09/Jan/13 ]

So hard to find this report in the search function.
With all the duplicates!

Comment by Mustek [ 09/Jan/13 ]

100 duplicates! Let's throw a party

Comment by Mustek [ 09/Jan/13 ]

Modified the description to include the exact replication steps

Comment by Runemoro [ 08/Jan/13 ]

Works with any item, it usually happens when throwing the item on the edge of the hopper. No chest is needed.

Comment by FireHunterX [ 08/Jan/13 ]

95 duplicates.

New record.

Comment by Nathan Ell [ 06/Jan/13 ]

As well, I have found that sometimes, when an item is in the hopper, and the hopper is over a trapped chest (unconfirmed with a regular chest), the item can sit in the hopper while the chest is filled with the item. I.e. I have one piece of glowstone dust sitting in the hopper, and it is not being transferred to the trapped chest, but when I look in the trapped chest, it is slowly filling with glowstone dust as if the hopper were constantly feeding it.

Comment by Skalmantas [ 05/Jan/13 ]

It happens when an item is thrown on the side of hopper.

Comment by miguel [ 05/Jan/13 ]

Don't create a supercircuit, only test it with a hopper, only a hopper and watch his slots. by this way, they will begin to check the hopper data and not cases like hopper-chest or hopper-hopper.

PD: YEEEE resolved , not cheats jijijiji

Comment by Jamie Martin [ 05/Jan/13 ]

I had this problem but it kept up until item was removed or no more space. I had two hoppers next to each other and had them empty into one large chest. The one item filled the chest and hopper then I picked it up and emptied the chests for lots of any item I tossed onto it.

Comment by Nick Salonen [ 05/Jan/13 ]

start with 65 items. throw one item on to the hopper edge by bouncing off a wall. throw the stack of 64 all at once. watch as you get 19 stacks of said item as long as you are standing back.

Comment by Howzieky [ 05/Jan/13 ]

Hey Dinnerbone, any chance for a 13w01c? I know of at least 2 bugs that are now fixed that would REALLY help me out!

Comment by FireHunterX [ 04/Jan/13 ]

Try a tool It's hilarious how many you get back
Threw in pickaxe, got back 12 of the same one.

Comment by Tanner [ 04/Jan/13 ]

If an item gets on the side of the hopper it will get duped (x2) and if something that cant stack get on the edge/lip of the hopper it will continuously dupe it (boats, buckets of water, minecarts, etc.

Comment by FireHunterX [ 04/Jan/13 ]

Here's how to do it.
Make 2 or more Hoppers leading to a chest. Throw a whole stack of items in (gold or iron is a good example). Watch as you get back nearly 2 whole stacks of the item you put in.

Has to be more than one.

Comment by Howzieky [ 04/Jan/13 ]

Heres my video http://youtu.be/D6qZgWngQp8

TO ALL PEOPLE: You MUST vote for this bug if you want it to be fixed!

Comment by A Y [ 04/Jan/13 ]

Confirmed.

Comment by Howzieky [ 04/Jan/13 ]

Here is a crash report!

Comment by Redacted [ 04/Jan/13 ]

In 13w01b items dupe when item lands onto the edge of the hopper itself.

Comment by Pixelgraph [ 04/Jan/13 ]

My video: http://youtu.be/zjOMPuuhgCQ

Comment by Meta [ 04/Jan/13 ]

Video from me: http://youtu.be/9N1YzxXCdjE

Comment by James [ 04/Jan/13 ]

Another video example: https://www.youtube.com/watch?v=tQe5QcfSMl8

Comment by Begbert [ 04/Jan/13 ]

I filled 2 dispensers with 9 stacks of diamons each and let them pass throug 3 Hoppers. The last chest in the last chest there were almost 40 stacks or diamonds. (belongs to 3 screenshots)

Comment by Meta [ 04/Jan/13 ]

Confirming items not getting removed from the world when lying on a corner/a side of the top of the hopper but getting cloned inside

Comment by Meta [ 04/Jan/13 ]

I can confirm this. I built a redstone circuit circle with a delay of 2 redstone ticks and let that fire a dispenser. Sometimes when dropping one block into a hopper which leads into a dispenser, the dispenser then outputs two blocks.
Also sometimes it picks a stack from above but that stack does not disappear then.

Got a video that shows everything I wrote above here but currently I can't upload because my connection is sick.

Comment by Tails [ 04/Jan/13 ]

Please do not mark unreleased versions as affected. You do not have access to this yet.

Comment by Peter Silie [ 04/Jan/13 ]

for me it works the best, if I incase the hopper and throw the item in the very corner.
if the item is nonstackable, then the hopper duplicates it until the hopper (or a container underneath) is full

Comment by Begbert [ 04/Jan/13 ]

I tried it and it added one item to the number of items thrown into the Hopper, if you put in on a chest and take the items out of the chest. May work by taking the items from a the hopper or a dispeser/furnace/... too. Works with any item I tested it and in 13w01b. Sry for bad English.
Edit: I'm uploading a video to YT atm, will be up in some minutes: http://youtu.be/8ZLwrSCsef4

Comment by miguel [ 04/Jan/13 ]

Directly you can watch the hopper slots, i tried with other items (netherbrick slab) and it seems that duplicate the item in a save/refresh time, i think.

Comment by Mustek [ 04/Jan/13 ]

Confirmed in 13w01b.

Only works on the first item thrown in it.

Edit, see MC-5999 for a better explanation.

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