Dropped items bounce on stairs, cauldrons, carpets and full / locked hoppers

Works on any stair position, items will keep velocity and [ some ] direction when bouncing:

http://www.youtube.com/watch?v=IR2EBUOaW5w

Not limited to the top of the stairs either. I discovered it when trying to convey items under stairs with water currents. Described in detail in duplicate: MC-3572 Items and stairs buggy collision

Upside down does the same, Etho has accoutered the problem too: /watch?v=1qcxJClC99w

If you throw an item across some ice at upside down stairs, it should slide through the ice but instead bounces back. I assume this is the same bug.

Hoppers that are deactivated by a redstone charge also bounce items around.

I can confirm in 13w07a.

I can confirm for 1.5. Also happens to cauldrons.

confirmed

I also noticed this happens for every block actually, but just very slightly. This affects only for a frame but doesn't make any difference for the actual position of the item

Happens in 13w17a on stairs, cauldrons and full hoppers.

Still in 13w19a. Could someone add cauldrons and full hoppers to the description?

Done.

This bug is so awesome! I love watching the items bounce, bounce, bounce, bounce, bounce, bounce, bounce, bounce, bounce, bounce, BOUNCE! 😃
There should be something that achieves this affect legitimately.

Still in 13w21a

Any updates on this issue? It greatly effects my plugin CraftBook.

Confirmed in 13w24b, I really hope this gets fixed, it is preventing me from releasing a slew of plugins.

Items also bounce on anvils, chests, etc. (tested in 13w24b). Don't get why this is still not fixed 😞

Any updates on this? I am hoping they fix this before 1.6.. I sent a tweet to Dinnerbone and Grum_ this morning but I don't think they saw it.

Still happens in 13w26a and 1.6-pre

Is this still a concern in the current Minecraft version? If so, please update the affected versions in order to best aid Mojang ensuring bugs are still valid in the latest releases/pre-releases.

Can confirm this for 1.6.1

confirmed for 1.6.1

Confirmed for 1.6.2

I think this would be a neat feature to add, because it adds the possibility of easier item transportation. There is a few "balancing" points to this bug already.

1. The item eventually loses momentum and stops
2. The item's angle matters, if it has the wrong angle it hits the edge and stops.

These two things make it harder to use item sewers, but allows drop transfer without lowering the destination height. I have made a few contraptions taking advantage of this bug, and working around the "balances." It took a huge system to align drops in the center of the stairs, and start their velocity off right, as well as a tricky water system inside pipes I made.

My opinion on this bug is that it should be turned into a feature, because I think it would make for some interesting and creative contraptions.

If this was to become a feature, I also propose a third balance that would only enable this bounce condition for sets of two stairs with their low end facing each other. Creating a channel-like block arrangement. I know this would probably be difficult because the bug likely relates to collision, and conditional collision is a tricky concept. Oh well, its just my thoughts on this bug. I hope it becomes a feature! 😃

Here is a screenshot of a little "drop sewer" of mine: http://imgur.com/ZupmY7k

Do Items have an angle?

@Jesper In what sense do you mean "angle"? They obviously have angle of direction, which was what I spoke of in my previous comments. As for their collision box having rotation, I do not think so.

Oh I thought you were talking about the rotation.

I know that this was atleast intentionally introduced for stairs to prevent Items from getting stuck in them. (If the stairs were used to create floor patterns)

Confirmed for 13w36a !

Needs to be fixed already...

Still a problem in 13w37b !

Seen in 13w39b, with a powered hopper. I'd actually thought it was due to the weighted pressure plate I had atop it.

Grum said in IRC this was a feature. I really hope he was joking.

Confirmed for 08a

Confirmed for 10c

I can confirm this is still an issue in the 1.8-pre1 release. I can replicate this bug using stairs, cauldrons, and hoppers, but carpets seem fine.

Kawsiphek: It is not fixed for 1.8, it's fixed for 1.9.

Galaxy_2alex, I did not think there was a 1.9 already. If you did not notice, I am reffering to the 1.8 prerelease that came out today. What was happened for me is if i throw an item into a stairway it seems to get pushed down the stairs well past the point where it should have landed.

http://i.imgur.com/qlwCaGU.png

Definitely a bug, but I'd take full advantage of it while we can (probably up until the first 1.9 snapshot)

This is one of the bugs that I do not want fixed, it has a huge use in map making as well as cool effects when role playing in minecraft.

@unknown what uses does it have in Map making?

just the idea of jump scares, or even the thought of popcorn or even cooking, we use it all the time on the server that I play on, and kinda run...

How does this enable jump scares?