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Unsafe World Random Access Detector (Fabric) project artwork

CurseForge · Minecraft mod

Unsafe World Random Access Detector (Fabric)

This is a mod that detects unsafe off-thread world random access, helping to find causes of "Accessing LegacyRandomSource from multiple threads" crash.

Choose a version Pick your version below, then grab the matching file.

Quick answer

Which Unsafe World Random Access Detector (Fabric) release should I use?

Updated last month
Latest stable file 1.1.4
Game version 1.21, 1.19.3, 1.20.2
Loader Fabric

Unsafe World Random Access Detector (Fabric) 1.1.4 targets 1.21, 1.19.3, 1.20.2 with Fabric. The project page does not say whether this file belongs on the client, dedicated server, or both. No extra mods listed for this file.

Where it goes

Is Unsafe World Random Access Detector (Fabric) required on the client, server, or both?

The project page does not say whether this file belongs on the client, dedicated server, or both.

Client Source doesn’t say
Dedicated server Source doesn’t say
Loader for this release Fabric
Required install it here Optional supported, not mandatory Not supported do not install here Source doesn’t say do not assume

The source does not explicitly classify this release as client-only or server-only.

Understand client and server requirements Read the Minecraft installation guide

What else does Unsafe World Random Access Detector (Fabric) 1.1.4 need?

1.1.4. Change the file and its required mods may change too.

No extra mods listed for this file

This file does not list any required mods. Do not add a library just because a different file uses it.

This file does not list any required or optional mods.

Before you install it

Add Unsafe World Random Access Detector (Fabric) without breaking your instance.

Built for Unsafe World Random Access Detector (Fabric) 1.1.4. Pick another file and the loader, install side or required mods may change.

  1. 01

    Stick to this file

    Use 1.1.4. It targets 1.21, 1.19.3, 1.20.2 with Fabric; another release may have different loader, side or dependency requirements.

  2. 02

    Bring the mods it needs

    This file does not list any required mods. Do not add a library just because a different file uses it.

  3. 03

    Put it on the correct side

    The project page does not say whether this file belongs on the client, dedicated server, or both.

  4. 04

    Pick the file you checked

    Use the “Get this file” button beside 1.1.4. It opens that exact file at the source.

About this project

What does Unsafe World Random Access Detector (Fabric) add?

Unsafe World Random Access Detector (Fabric)

This is a mod that detects unsafe off-thread world random access, helping to find causes of "Accessing LegacyRandomSource from multiple threads" crash.

This is useful for finding the cause of mysterious crashes with Accessing LegacyRandomSource from multiple threads.
This is not a fix for the issue, but it will help you find the cause of the issue.

Looking for forge versions? Looking for neoforge versions?

Example

Note: If you are already using C2ME, this mod is not needed (but won't crash if used together anyway).

Project description from CurseForge.

Pick your setup

Unsafe World Random Access Detector (Fabric) by Minecraft version and loader

Choose the version and loader you play, then open the matching release.

29 available setups

Showing the newest 12 of 29 game versions. Older files are in the list below.

Check the dependencies, then try the file in a copied instance before changing a world you care about.

Recent files

Unsafe World Random Access Detector (Fabric) versions and loaders

4 of 4 releases match

Looking for an older file? The official CurseForge project page is in Resources.

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