MC-270735Safe fall distance attribute modifier for jump boost is not added when upgrading worlds
When upgrading a world from prior to 24w06a when the minecraft:generic.safe_fall_distance entity attribute, the attribute modifier added for jump boost is not added for players who already had jump boost. As a result, these players will incorrectly take damage from falls where they hadn't before.
Steps to reproduce
1. Create a 1.20.4 world
2. Give yourself the jump boost effect: /effect give @s jump_boost infinite 10
3. Observe that you do not take damage from simply jumping and falling
4. Load the world in 1.20.5 pre-release 1
5. Observe that you now take damage from simply jumping and falling
(This can be observed in vanilla with a standard jump boost potion, but the effect is less pronounced there.)
Created Issue:
Safe fall distance attribute modifier for jump boost is not added when upgrading worlds
When upgrading a world from prior to 24w06a when the minecraft:generic.safe_fall_distance entity attribute, the attribute modifier added for jump boost is not added for players who already had jump boost. As a result, these players will incorrectly take damage from falls where they hadn't before.
Steps to reproduce
1. Create a 1.20.4 world
2. Give yourself the jump boost effect: /effect give @s jump_boost infinite 10
3. Observe that you do not take damage from simply jumping and falling
4. Load the world in 1.20.5 pre-release 1
5. Observe that you now take damage from simply jumping and falling(This can be observed in vanilla with a standard jump boost potion, but the effect is less pronounced there.)
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Thank you for your report!
After consideration, the issue is being closed as Won't Fix.
Please note that this is not the same as Working as Intended, as this bug report correctly describes behavior in the game that might not be the intended or desirable behavior, but it will not be fixed right now. Sometimes, this is because the issue reported is minor and/or impossible to change without large architectural changes to the code base.
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