PaperMC / PaperMC/Paper

setNoDamageTicks is broken

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#11,988 5 comments 0 reactions 0 assignees View on GitHub

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status: input wanted version: 1.21.4
Dominant language
Java
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Avg merge
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Description

Expected behavior

setNoDamageTicks should make a given player invulnerable for the given amount of ticks

Observed/Actual behavior

They still take damage (in my case from explosions)

Steps/models to reproduce

player.setNoDamageTicks
world.createExplosion next to the player
they die from explosion damage

Plugin and Datapack List

N/A

Paper version

This server is running Paper version 1.21.4-DEV-main@a35cfe9 (1970-01-01T00:00:00Z) (Implementing API version 1.21.4-R0.1-SNAPSHOT)
You are 1 version(s) behind
Download the new version at: https://papermc.io/downloads/paper
Previous version: 1.21.4-DEV-cd9d6d6 (MC: 1.21.4)

Other

No response

Contributor guide

Open the contributing guide

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start with the setNoDamageTicks API entry point and reproduce the issue using world.createExplosion next to a player. Trace how explosion damage checks the player's invulnerability ticks, then verify that damage is prevented for the requested duration and add or update coverage if the relevant test location is found.

Written by the indexing model from the issue text.

Assessment

Tech stack
java
Domain
api, backend
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
35/100

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