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MC-124698

Redstone wire on hopper and redstone block does not update shape and surrounding blocks when redstone wire is placed / removed diagonally downwards

The bug

Redstone wire on top of hoppers and redstone blocks does not update its shape / orientation and surrounding blocks when redstone wire is placed / removed diagonally downards.

Note: In 1.12.2 the redstone wire updates client-side only, and possibly server-side not at all in any situation.

How to reproduce

  1. Build the setup shown in

[media]
  1. Place redstone wire on the lapis block
    → ❌ Both lamps stay on and the redstone wire on top of redstone block remains a dot

You can verify that this is not client-side only by using for example /execute if block. The lamp and redstone wire update when you cause a block update for them, for example by placing a block next (depends on wire orientation) respectively above them.

Linked issues

Attachments

Comments

Aaron Rhodes

Similar situation in the screenshot I added. Place redstone wire on the redstone block then remove the wire on the lapis block. The unpowered lamp remains off and the wire on the redstone block remains a line rather than reverting to a dot.

To clarify the description, the redstone lamp requires a block update, not just a block placed on top of it. The wire needs a block placed above it, or for a block to be placed and removed adjacent to it's orientation (above the wire on the lapis block). Placing and removing a block on the opposite side of the unpowered lamp will not update the wire. The same applies to the situation that I mentioned. Also of note, updating the wire does not update the lamp and vice versa; they both require separate block updates. Tested in 18w05a.

marcono1234

Could it be the case that you attached the wrong screenshot, because yours shows correct behavior.

Aaron Rhodes

I will attach a few screenshots that show the bugged behavior in both cases. The screenshot I already added was just used as the starting setup to produce the situation I mentioned, and I will rename it for clarity.

marcono1234

(Unassigned)

Community Consensus

hopper, redstone_block, redstone_wire

Minecraft 1.12.2, Minecraft 18w05a

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