End Gateway shows beacon beam every 2400 ticks even if no entity teleported

Confirmed for

• 16w39c

Please change the title to "End Gateway shows beacon beam every 2400 ticks even if no entity teleported"

How to reproduce

1. Use the following command

   /setblock ~2 ~ ~ end_gateway default replace {Age:4780L}

   → The beam appears one second (20 ticks) after the end gateway was placed, despite no entity being teleported

Please link to this comment in the description

The following is based on a decompiled version of Minecraft 1.10 using MCP 9.30.

This happens because the added a condition that end gateways act every 2400 ticks as if an entity was just teleported. It is also implemented in a way that this happens even if an entity teleported in the same tick (if instead of else if).

Affected class:

16w39c

Class: asu.class
Line: 86
Condition: this.f % 2400L == 0L

Can you please add the way to reproduce described in this comment as well

This may have something to do with the random end gateways that show up in the outer lands starting 16w39a, maybe for them to be seen easier.

Bug still exists in 16w41a

Bug still exists in 16w42a

I see this too except I did not know it had a set time

Video that proves this behaviour (in 16w44a) https://www.youtube.com/watch?v=bea6rbEkGDE
Just ran into it by chance. It does NOT occur for me in 1.10.2 though, and this bug says it would be 1.10.2 as well?
I waited for at least 6 minutes, and as it occurs each 2 minutes, it should have shown up, but it didn't for me, in 1.10.2.

You don't have to insert any Age when you setblock or fill an area with the gateway portalblocks to reproduce, it will occur already with this basic command, periodically each 2 minutes, but not in 1.10.2:

/fill ~-4 ~-2 ~-4 ~3 ~2 ~3 end_gateway 0

Confirmed for 1.11.2

I think it's WAI to easier find where is end portal block randomly placed in end.

It's hopefully not WaI, as this ruins a bunch of contraptions for mapmakers.
In case it is WaI due to Survival, maybe there could be an additional workaround for Creative, e.g. an additional tag or something along those lines for mapmakers, so it doesn't behave each 2400 ticks as if an entity would have been teleported.

Gave ticket to @unknown

Meri (or anyone), if this bug is giving you trouble, here's a workaround until it's fixed:

/blockdata X Y Z {Age:-9223372036854775807L}

It doesn't fire when at a negative multiple of 2400, so running that once for each block should keep it behaving nicely for 14,623,560,400 years or so 😉

@unknown I didn't think of offering a workaround for the time being as I was too convinced it is not WaI and they'd fix it asap 😃

You're of course right, and I'll add it to the description, but will also mention the consequences of this negative age method, just to make sure everyone can figure if this works for their specific usage.

For most people this is surely a good workaround for now!

Thank you! 🙂

@@unknown I removed some parts of the description to make the report more compact and to make it easier to get a quick overview. I hope you are fine with that.

Using -9223372036854775808L as Age might be a bit ridiculous. If you think it is, feel free to replace that with a lower suggested value again.

Confirmed for 1.13pre4.

Confirmed for 1.13-pre6.