[MC-9363] Rows of Vertical Down Piston Extenders have a >50% failure rate

When pistons are lined up in a row, facing downward (useful for portcullis) more then half of the second set of pistons fire out of order and it creates a graphical glitch as well. When the block next to the piston is powered it is more likely to power the piston below it then the piston next to it, this is counter intuitive and not how it acts in 1.4.7. This bug was reported several times for last snapshot but always got tagged as being a duplicate for another unrelated bug that is reported as fixed.

Linked issues

is cloned by 1

MC-15616 Rows of Vertical Piston Extenders have a 25-50% failure rate while retracting Resolved

is duplicated by 7

MC-9727 line of redstone besides a stack of pistons powers buds the bottom pistons or powers top ones in a pattern Resolved

MC-9824 Unpredictable piston movement Resolved

MC-9937 Very strange 1 tick pulse bug Resolved

MC-10197 Piston can't push annother piston Resolved

2 more links

Attachments

Comments 19

Manuel 2013-02-07T21:00:02Z

i can confirm this, its also horizontal

Pete Frisky 2013-02-11T06:47:59Z

Yes, as the other piston pushing piston bug, that resulted in the graphics glitch was fixed to an extent. In my 13w06a tests, a horizontal array of pistons powered from above will only activate every second piston. This kills any hidden stairways and my horizontal feed portcullis.

kumasasa 2013-02-14T07:13:04Z

~~Resolved as duplicate of MC-8992~~ Nevermind

Ray Kohler 2013-02-14T17:57:18Z

Still broken as of 13w7a

Manuel 2013-02-20T19:39:14Z

i think it's related to MC-108

9 more comments

Charles Bolanos 2013-02-24T09:54:21Z

13w07a....I try to do that Secret stair case by CNBMinecraft, and then some sticky pistons won't retract eachother or push eachother. When trying to get the stairs going like in the videos, the pistons just stay stuck or wont seem to retract at all.

Ray Kohler 2013-02-26T18:29:10Z

Still broken as of 13w09a. If this gets overlooked and makes it into the official release of 1.5 I will be really, annoyed.

@Manuel, yes I do think it's a bud related glitch.
@Charles, 1.5 has also changed timing in redstone circuits so some repeaters may need adjusted. My 2 wide secret stairs worked after I added 1 tick extra delay to two repeaters.

Pete Frisky 2013-02-27T15:31:18Z

The simple horazontal piston test. 2 rows of pistons powers from above. Powering this setup in v1.4.7 and below will result in the second row of pistons being pushed out before extending themselves. The snapshots leading up to the 1.5 update including 13w09a still result in every second piston extending inconsistently. Adding extra sceenshots.

Ray Kohler 2013-02-27T17:07:21Z

And still broken as of 13w09b, with the pre-release this week if this bug isn't noticed and fix there is a good chance it will make it into the official 1.5 release.

Pete Frisky 2013-02-27T19:37:40Z

@Ray Kohler I know, not feeling like this is been seen. Trying to spread the word on the forums but getting no love. More people need to up vote this.

Jens Bergensten 2013-02-28T18:44:06Z

I think this is fixed now, will check tomorrow.

Jens Bergensten 2013-03-01T09:47:09Z

Marking this as fixed now. This example is stable: http://imgur.com/a/9FMnX

Ray Kohler 2013-03-01T16:46:50Z

I can confirm, this is working as of 13w09c. I was a little worried when the stable example was a horizontal extender but all of my vertical tests work fine. I did find a new piston deleting bug though, I will report that when I have time.

Manuel 2013-03-01T16:57:45Z

Its already reported: MC-9460

Pete Frisky 2013-03-02T15:08:50Z

@jeb thanks for addressing this, I was worried it was hidden with so few votes. Now onto MC-9460. It's a good start.

MG127 2013-05-12T11:40:11Z

are you sure that this is 100% fixed?
http://youtu.be/Q-AOr8dD2F4?t=29s
maybe i'll just open another issue for that

kumasasa 2013-05-12T21:55:57Z

Can anyone confirm the comment of MG127 ?

James 2013-05-13T13:01:42Z

I can confirm the comment of MG127 within the latest snapshot with this screenshot. No doubt still occurs.

James 2013-05-13T13:05:59Z

just another screenshot looking at the other side of the previous one I attached.