The bug
The exit portal in the end generates at the highest block at 0 0 after opening a pre 1.9 world in 1.9 or newer versions. This can cause the portal to be incomplete. Additionally you might end up with end crystals from old end pillars inside it.
How to reproduce
Download
and drag it into
.minecraft\saves.
:info: Set yourRender Distanceto 11 or above, due MC-137467.Open the world in the latest version (with the new dragon fight).
→ The portal generated at the highest block at 0 0. With this example it generated incomplete, see
.
How to reproduce (naturally generated)
Seed
-953538683905638291Coordinates
/execute in minecraft:the_end run tp @s 0.35 22.00 0.79 379.99 90.00Linked issues
is duplicated by 9
MC-144023
The exit portal could naturally generate too low
Resolved
MC-166199
End portal can generate underground
Resolved
MC-182627
End exit portal does not generate if there's no end stone island at the end origin
Resolved
MC-200225
Exit Portal fails to spawn when no terrain is generated at 0 0
Resolved
MC-201338
End generation resulted in a large hole in the middle. No portal in middle.
Resolved
relates to 4
MC-279325
Broken end portals affected by MC-93185 from before 25w02a not datafixed
Reopened
MC-82832
End Portal Spawns position changes
Resolved
MC-207174
When blocks are placed above the End altar, the Ender Dragon comes to rest on top of said blocks rather than on top of the altar
Open
MC-249012
The exit portal in the end can generate underground or partially underground
Open
Attachments
Comments 15
I found out that exit portals could also naturally generate too low in extremely rare cases. To reproduce that, use the seed -953538683905638291, go to the end, and teleport to 3 19 0.
Maybe this issue could be fixed by generating the exit portal at a specific height (y1 or above) when there's no solid block at (0,0).
By looking at the level.dat you can see in those seeds the end portal is placed at Y -1 despite the end ending at Y0
[media]
The simple solution would be forbidding the y value for ExitPortalLocation from being lower than 1 (or better, bedrock_level +1 because of custom worlds)
Also most importantly all affected worlds from before the fix would need to have ExitPortalLocation datafixed to Y1
gnembon
Confirmed for
15w47c The screenshot added shows the portal just below y=256 as in 1.8 a stone tower was placed that high.