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Unsafe World Random Access Detector

Unsafe World Random Access Detector

by ishland • Downloads: 0 • Followers: 0
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Unsafe World Random Access Detector

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.

Example

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

All Versions

+ Add Version
Name Game version Platforms Published Downloads Actions
26.3 26.2 26.1.x +1
Neoforge
16h ago 1
1.21.x 1.20.x 1.19.x
Fabric
16h ago 1
26.3 26.2 26.1.x
Fabric
16h ago 1
1.21.x
Neoforge
16h ago 1
1.21.x
Neoforge
16h ago 1
1.21.x 1.20.6
Forge
16h ago 1
1.20.x 1.19.x
Forge
16h ago 1
1.21.x 1.20.x 1.19.x
Fabric
16h ago 1
1.19.x
Fabric
16h ago 1
  • stop-gap solution for create virtual render world
  • Support 1.21+
[1.1.4] 1.1.4 by ishland on Oct 13, 2026
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stop-gap solution for create virtual render world
Fixes NF 1.21.5
NeoForge 1.21+ support
[1.1.1+forge] 1.1.1+forge by ishland on Oct 13, 2026
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Forge 1.20.6+ compatibility
Port to forge
[1.1.0] 1.1.0 for fabric by ishland on Oct 13, 2026
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Enhances error message and resolves mixin in stacktrace.
[1.0.0] 1.0.0 by ishland on Oct 13, 2026
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Initial implementation
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