a a
- aldaf
- aldaf
- Europe/Berlin
- Yes
- No
When redstone with strength 1 connects upwards and to the side, the block with the unpowered redstone on top will not be powered even though the powered redstone dust points into it.
Top left section and bottom right section show the dust behaving as expected with strength>1 or when not connecting sideways.
The top right shows a direct corner with strength 1 not powering the "connected" block (marked with the red circle).
The bottom right shows the case where the connection forces a redstone "dot" into a line. This does also not power the "connected" block (marked with the red circle), but does power the "unconnected" block as it should.
This looks to be an oversight handling the special case of redstone with strength 1 moving upwards after either a corner or a redstone dot that was forced into a straight line.
When redstone with strength 1 connects upwards and to the side, the block with the unpowered redstone on top will not be powered even though the powered redstone dust points into it.
Top left section and bottom right section show the dust behaving as expected with strength>1 or when not connecting sideways.
The top right shows a direct corner with strength 1 not powering the "connected" block (marked with the red circle).
The bottom right shows the case where the connection forces a redstone "dot" into a line. This does also not power the "connected" block (marked with the red circle), but does power the "unconnected" block as it should.
This looks to be an oversight handling the special case of redstone with strength 1 moving upwards after either a corner or a redstone dot that was forced into a straight line.
When redstone with strength 1 connects upwards and to the side, the block with the unpowered redstone on top will not be powered even though the powered redstone dust points into it.
Top left section and bottom right section show the dust behaving as expected with strength>1 or when not connecting sideways.
The top right shows a direct corner with strength 1 not powering the "connected" block (marked with the red circle).
The bottom right shows the case where the connection forces a redstone "dot" into a line. This does also not power the "connected" block (marked with the red circle), but does power the "unconnected" block as it should.
This looks to be an oversight handling the special case of redstone with strength 1 moving upwards after either a corner or a redstone dot that was forced into a straight line.
It has been like that for a long time, but I especially find the bottom left case counter-intuitive.
The other cases can be justified by behaving "like the unpowered dust is not there", but if that is the intended behavior the bottom left case should "work" as well.


Can confirm this bug is still happening for nether portals in multiplayer in 15w45a.
I have a few portals at y=5 in the nether, coming through from the overworld would sometimes set me on fire, even though the area around the portals was clear.
Today i got disconnected when going to nether and ended up at the "overworld coordinates", but in the nether, inside a lava lake. That lava was probably setting me on fire before the teleport to the correct portal applied. That teleport didn't happen because of the disconnect, leaving me at those coordinates.
confirmed for 16w14a: pistons randomly stay extended, effect is worse when redstone is in a grid (see 2016-04-09_20.26.08.png)
still affects 16w15b
Affects 1.9.3-pre2... Interestingly, when using upsidedown slabs instead of solid blocks to power pistons below, they retract as intended...
https://gfycat.com/SlimyWellgroomedDikdik
Edit: i know why it works that way given this bug, just found it interesting and it might be a workaround for some people, given this seems unlikely to be fixed soon
Those all affect one very specific case with redstone consistently not powering the piston when passing diagonally "through" it.
In this case the problem is that just curved (top left) or "upwards straightened dots" (bottom left) with strength 1 don't power blocks which wires
do power.