PaperMC / PaperMC/Paper

Detector rail is sometimes triggered when a minecart drives next to it.

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status: accepted type: bug upstream: vanilla version: 1.20.1
Dominant language
Java
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Avg merge
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Description

Expected behavior

A detector rail is only triggered when a minecart drives over it.

Observed/Actual behavior

Detector rail is sometimes triggered when a minecart drives next to it.

Steps/models to reproduce

YT-Video: https://www.youtube.com/watch?v=frW0af0Dhbs
Litematica schematic: detector rail bug.zip

Plugin and Datapack List

Bukkit Plugins:
GriefPrevention, Multiverse-Core, Multiverse-Inventories, Multiverse-NetherPortals, Multiverse-Portals, Vault

Paper version

This server is running Paper version git-Paper-169 (MC: 1.20.1) (Implementing API version 1.20.1-R0.1-SNAPSHOT) (Git: b4e3b3d)\nYou are 2 version(s) behind\nDownload the new version at: https://papermc.io/downloads/paper\nPrevious version: git-Paper-516 (MC: 1.19.4)

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 by reproducing the detector-rail behavior in Paper git-Paper-169 for Minecraft 1.20.1 using the linked YouTube video and Litematica schematic, with the listed plugins in mind. Trace the detector rail and minecart interaction from the reproduction until the adjacent minecart is incorrectly detected. Done means a minecart beside the rail no longer triggers it, while a minecart driving over it still does.

Written by the indexing model from the issue text.

Assessment

Tech stack
java
Domain
game-dev
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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