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MC-122159

Container inventory changes don't update nearby comparators

The bug

Comparators won't give output when near a container that got items in it without updating it.

Confirmed with:

  • Dropper

  • Dispenser

  • Furnace

  • Hopper

  • Chests - fed with hopper or dropper

  • Jukebox

  • Brewing Stand

Linked issues

MC-122194 Comparators don't work MC-122301 My red stone doesn't seem to be working. MC-122353 Redstone Comparator not working properly MC-122387 Comparators fail to work correctly with hoppers, droppers, dispensers in 1.13 MC-122396 Hopper can not weigh items. MC-122399 Comparator can not weigh items. Bug MC-122459 Comparators need updates to work MC-122604 17w48a comparator does not register a dropper MC-122669 Comparator doesn't update with Hoppers, Dispensers, etc MC-122690 Item sorters no longer work MC-122697 Comparator needs an blockupdate MC-122760 Comparator requires a block update for certain blocks MC-122849 Comparator not detect MC-122884 Comparators attached to hoppers have varied outputs MC-122923 Comparator need an update to change MC-123005 Comparators & Hoppers (detecting Bug) MC-123036 comparator doesn't work properly MC-123042 Comparator does not output signal from hopper.

Attachments

Comments

Rey Watts

I've had this happen as well.

Ole

Droppers and dispensers doesn't cause the comparator to update either.
A block update near the comparator will update its value.
Chests, trapped chests and cauldrons works fine.

Xavom

Confirmed with:

  • Dropper

  • Dispenser

  • Furnace

  • Hopper

  • Chests - fed with hopper or dropper

  • Jukebox

  • Brewing Stand

When placing items manually in a chest, the comparator is updated only when closing.

Comparators also seem slow to update when reading minecarts with hopper or chest.

Xavom

Also Confirmed:

  • Shulker Boxes

Amokra

Guess I'll just add my two cents worth

It works with redstone torches.

NeunEinser

Dupe of MC-120986.

user-f2760

Not the same, this started in the snapshots.

NeunEinser

The issue got worse in the snapshots, but I updated my issue for 17w47b, so it does describe everything that is mentioned here.

NeunEinser

Or should I revert the changes I did on my ticket so that the devs or more likely do notice this ticket, because it is newer and exclusively describes the changed behavior in the snapshots?

user-f2760

Because this is new behavior in the snapshots, I doubt it's the same cause in the code. Leaving is separate.

Also, the devs tend to prefer fixing issues from the snapshot first, so this may pop up for them then, making is fixed (a lot) earlier (which may lead them to your ticket too). 🙂

Peter Pokorny

I made a duplicate ticket - has a extra tidbit of info. Comparators update their signal when you right click on them, but will retain the last input after right clicking. So if you right click the comparator with an item in the hopper, it gets an input state. Take the items out, and it will be stuck. Right click a couple times and it will reset.
MC-122884

Eran G

Erik Broes

Confirmed

brewing_stand, chest, comparator, containers, dispenser, dropper, furnace, hopper, jukebox, output, redstone

Minecraft 17w47a, Minecraft 17w47b, Minecraft 17w48a, Minecraft 17w49a, Minecraft 17w49b

Minecraft 17w50a

Retrieved