[MC-5998] Item duplication by using the hopper

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

Linked issues

is duplicated by 106

MC-5999 Item Duplication Hopper Resolved

MC-6000 hopper duplication items Resolved

MC-6003 hopper duplication glitch Resolved

MC-6004 Another dupe.... Resolved

MC-6006 Duplication machine with hopper. Resolved

101 more links

Attachments

crash-2013-01-04_16.15.52-client.txt

Comments 38

Mustek 2013-01-04T13:15:57Z

Confirmed in 13w01b.

Only works on the first item thrown in it.

Edit, see [MC-5999] for a better explanation.

miguel 2013-01-04T13:25:34Z

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.

Begbert 2013-01-04T14:17:58Z

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

Peter Silie 2013-01-04T15:02:30Z

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

Tails 2013-01-04T15:15:25Z

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

28 more comments

Meta 2013-01-04T17:39:17Z

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.

Meta 2013-01-04T18:38:38Z

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

Begbert 2013-01-04T19:18:26Z

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)

James 2013-01-04T19:23:52Z

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

Meta 2013-01-04T20:07:32Z

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

Pixelgraph 2013-01-04T22:50:32Z

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

Howzieky 2013-01-04T23:17:14Z

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

Howzieky 2013-01-04T23:17:14Z

Here is a crash report!

A Y 2013-01-04T23:37:02Z

Confirmed.

Howzieky 2013-01-04T23:40:00Z

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

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

FireHunterX 2013-01-04T23:50:11Z

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.

Tanner 2013-01-04T23:53:22Z

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.

FireHunterX 2013-01-04T23:54:22Z

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

Howzieky 2013-01-05T05:39:25Z

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

Nick Salonen 2013-01-05T05:42:45Z

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.

Jamie Martin 2013-01-05T07:19:19Z

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.

miguel 2013-01-05T14:57:17Z

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

Skalmantas 2013-01-05T21:36:53Z

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

Nathan Ell 2013-01-06T19:04:21Z

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.

FireHunterX 2013-01-08T20:03:55Z

95 duplicates.

New record.

Runemoro 2013-01-08T21:13:07Z

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

Mustek 2013-01-09T02:06:28Z

Modified the description to include the exact replication steps

Mustek 2013-01-09T15:54:05Z

100 duplicates! Let's throw a party 😃

FireHunterX 2013-01-09T20:07:36Z

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

mike 2013-01-09T20:17:53Z

Also happens in 13w01b.

mike 2013-04-30T19:15:57Z

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.

Jason Purslow 2013-04-30T20:52:16Z

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.

mike 2013-05-01T11:38:31Z

So you were using 13w17a?

Justin Lawen 2013-05-02T14:32:26Z

@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.

Tails 2013-05-02T14:58:45Z

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

Jason Purslow 2013-05-02T15:23:33Z

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

Nicolas Posocco 2014-02-25T22:27:54Z

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 ?

Tails 2014-02-26T17:07:24Z

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

Closing, since this particular report was fixed ages ago.