[MC-56557] Piston Extending when it shouldn't

Reproduce:

1. Open a new superflat,
2. dig 2 blocks down,
3. Place a piston at 1 block height,
4. Place a redstone block ON the piston,
5. Place a redstone block under the piston,
6. Break the redstone block under the piston.

Images included.

Related issues

duplicates

MC-108 Droppers, Dispensers and Pistons activate when blocks are providing power diagonally or two blocks above

Attachments

Comments

migrated 2014-06-10T10:21:57Z

[media][media][media][media]

migrated 2014-06-10T10:30:17Z

WAI. See MC-108

@Eladk, the block above the piston is part of it. Therefore, duplicate of MC-108

@Marcono1234, its the block above the piston.

migrated 2014-06-10T10:47:32Z

Not related.

Redstone blocks in the image aren't part of the case and are there solely for cosmetic purposes.

migrated 2014-06-10T10:53:26Z

Proof: http://tinypic.com/r/w138ya/8
http://tinypic.com/r/xgll6g/8

marcono1234 2014-06-10T11:28:02Z

Confirmed for 14w21b
This really seems not like a bud switch, else placing a block next to the piston should contract the piston

*Probably really a BUD

migrated 2014-06-10T11:56:48Z

It's not. If you might read in the background, it's my BUD lab. It was discovered as BUD but then proven as a regular glitch.

migrated 2014-06-10T12:39:09Z

@Blah, as far as I know, pistons cannot be powered from the top in any way. MC 108 has no relation.

migrated 2014-06-10T13:01:47Z

Blah is right, this is just an ordinary BUD.

migrated 2014-06-10T13:16:57Z

Not for me. I tried to use it as a bud, it didn't work.

Torabi 2014-06-10T13:38:16Z

This is indeed a duplicate of MC-108. The piston is being powered by the block of redstone. Pistons can be powered by blocks that are two blocks above them, regardless of the orientation of the piston. Try placing a redstone block two blocks above a piston (as shown in "Step 1"), then updating the piston by placing a block next to it. As seen in "Step 2", this will cause the piston to extend.