The bug
Cactus can generate excessively tall, though it can only grow three blocks high. Fun and harmless generation quirk. Also very old and has been in the game since at least 1.4.7.
To reproduce
Enter any of the following seed and coordinates.
6-block tall cacti (found by Reddit users, 1.17.1)
Seed: -1539315707261341838
/execute in minecraft:overworld run tp @s 186.44 73.12 135.50 90.30 34.20
Seed: 840511738247485999
/execute in minecraft:overworld run tp @s -62.64 72.53 77.23 219.00 12.90
4-block tall cacti (1.18-pre1 – 1.18-pre6)
Seed: 7394312107885230768
/execute in minecraft:overworld run tp @s -3157.50 75.64 -3922.50 260.24 31.35
Expected result
Cactus would only generate up to 3 blocks high.
Related issues
relates to
Attachments
Comments


Clones MC-165558.

Can confirm, but i think fixing it would do more harm than good. Also, an extremely tall cactus is very unlikely to happen, and removing this would probably get the seed community upset.

I'm not that sure, the seed community is mostly on older versions of the game. However, as much more game-breaking bugs were marked as "Won't Fix" (I'm looking at you, MC-111378), this probably will as well.

Can confirm 24w06a - Seed: -7877430694532488779 (with all experiments enabled), Coords: -36 74 39
I definitely agree this one does no harm, it's like a fun easter egg. Congratulations player, you found the one in a million chance 6 tall cactus!