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MC-3582

Trapdoors are not toggled by pressure plates on slabs

A pressure plate on a slab will not open a trapdoor, but will close an open one. Doors work as expected, pressure plate on a slab will open them. wood and stone pressure plates act the same, and all types of slabs the same.

What I expected to happen was...:
I thought that a pressure plate on a slab would open the trap door

What actually happened was...:
the trap door did not open

Steps to Reproduce:
1. put down a slab level with the top of a block
2. place a pressure plate on the slab
3. place a trap door on the same level, on the slab or appropriate block
4. walk on to the pressure plate
5. an open trapdoor will close, a closed one will do nothing.

Linked issues

MC-11173 Door closes on near redstone update MC-13014 trapdoors dont receive power on half steps MC-14859 Trap Door & Doors Closes On Redstone Update MC-16715 Fence gates close with pistons MC-18220 Tripwire hook send redstone signal door MC-19535 Redstone inconsistently affects track direction MC-25919 Trap Doors close on the block trip wire hooks are on. MC-29839 Placing redstone dust on a block closes opened trapdoors attached to it MC-41049 When an unpowered redstone switch is placed next an open door and then removed it will close it. MC-44238 Trapdoors open and close by themself MC-46392 Tripwirehook open Trapdoor MC-46561 Redstone signal on barrier to trapdoors MC-50684 Redstone Door Bug MC-51174 Redstone - Wood Trapdoor MC-51631 Junction rail incorrectly returning to the "off state" MC-59765 Redstone repeater under open trapdoor MC-77454 Trapdoor Opening Without Power MC-92702 Repeater powers trapdoors when inactive MC-105361 Trapdoors When the Block Below Them Updates MC-117702 Trapdoor closes on redstone update (no matter which type) MC-119408 open wooden trapdoors close when updated by redstone

Comments

CubeTheThird

Can confirm.

George Randall

Since the top-slab is not a whole block, I would think it shouldn't transmit redstone signal at all. So, what I would expect to happen would be that the trap door doesn't move at all.

I think the bug here is that an open one is closing.

Tails

Main issue: any redstone update close to a door/trapdoor/fence gates causes it to update.

Dranitsin Roman

Same with wooden doors.

Kwin van der Veen

I just did some tests with other "block updates", since in a certain way it does make sense that a (trap)door which has been put into a "bad" state by a player would change to the "right" state when receiving a block update.

There are some inconsistencies. When I open an unpowered (trap)door (so by a player) it will close again if there is a redstone block update, but not if there are other block updates like placing/removing a block. But when it is the other way around, so when I close a powered (trap)door it will open again with any block update.

John Distler

Confirmed in 13w19a.
Very annoying behavior. Not very usable in redstone contraptions. Should be fixed ASAP!

Device to replicate this:
! = Door/Trapdoor/Fence Gate
O = Redstone
+ = Block
8 = Button

!
+
OOOOOOO+8

Open the door/trapdoor/fence gate and press the button.

megashub

Can this issue please be updated to include 1.6.2 and Survival mode as well?

branza

Fixed only for doors in 14w11b.

muzikbike

Affects 18w46a (at least the trapdoor thing does - why are there like three bug reports crammed into one here?)

RedCMD

Can confirm fixed in 1.14 for trapdoors/doors/fence gates

NeunEinser

The report is only about trapdoors, so fixed?

FaRo1

I just tested it: Upper slab, pressure plate on top, trap door next to the pressure plate, open trap door manually, step on pressure plate, step off pressure plate. Result: Trap door closes.

The case in the screenshots does indeed not apply anymore, can someone remove them, please?

@unknown What do you mean with three reports in one?

muzikbike

Can I have my ownership of this ticket revoked? Don't want to deal with it anymore.

Jack McKalling

The issue described in this ticket is actually the trapdoor closing to the pressure plate, as it not opening through the slab is intended. This was finally fixed in a 1.13 snapshot, I presume due to new blockstates.

Conor Fuller

No User

(Unassigned)

Confirmed

Redstone

trapdoor

Minecraft 1.4.5, Minecraft 1.4.6, Minecraft 1.4.7, Snapshot 13w10a, Snapshot 13w10b, ..., Minecraft 1.14.2 Pre-Release 3, Minecraft 1.14.3 Pre-Release 3, Minecraft 1.14.3 Pre-Release 4, 19w35a, 19w36a

Minecraft 17w47a

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