Mod Name

Axiom (Fabric) + Sinytra Connector

Mod Homepage

• Axiom: [Modrinth link]
• Sinytra Connector: [GitHub link]

Minecraft Version

1.21.1

Describe the Bug

The game fails to launch when using Axiom 4.3.3 with Sinytra Connector v2.0.0-beta.5+ and newer. The error stems from a module dependency issue where Axiom cannot access mixinextras.neoforge, causing an IllegalAccessError during Mixin bootstrapping.

Steps to Reproduce

1. Use NeoForge 21.1.90 for Minecraft 1.21.1.
2. Install:
   • Forgified Fabric API(0.107.0+2.0.22+1.21.1)
   • Connector Extras(1.12.1+1.21.1)
   • Sinytra Connector (v2.0.0-beta.5+ or newer)
   • Axiom 4.3.3 (Fabric)
3. Launch the game.

Logs

• IntelliJ Run Log: https://mclo.gs/w1oUHwD
• Crash Report: No crash log generated (failure occurs during early transformation).
• v2.0.0-beta.5+1.21.1: Latest.log: https://mclo.gs/vmYfg4f, Debug.log: https://mclo.gs/2FrTooS
• 2.0.0-beta.6+1.21.1: Latest.log: https://mclo.gs/e6mN4r9, Debug.log: https://mclo.gs/kEIE2ZW

Additional Context

• Isolation Testing:
  • Works with Connector v2.0.0-beta.4 (pre-Commit 3c8bfed).
  • Fails with Connector v2.0.0-beta.5+ (post-Commit 3c8bfed).
• Key Error:

  Caused by: java.lang.IllegalAccessError:   
    class Axiom module → does not read module mixinextras.neoforge  
  

• Temporary Fix: Removing lines 150-152 in ConnectorLocator.java resolves the issue. Works for Connector v2.0.0-beta.5+

Hello, what setup did you use previously that worked?

This is caused by the same issue as #1634. It seems like jar-in-jar libraries are being loaded in a way where they can't access anything

Sorry about the JIJ module issue, it's getting fixed in beta 7.

Awesome thanks!