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Magma Hybrid Crash

A Magma hybrid server crashed on a Forge/Bukkit mixin conflict. Magma merges Forge and Bukkit, and its mixins can clash with a mod or plugin, producing a startup or runtime crash.

What does this error mean?
Magma is a Forge+Bukkit hybrid that uses mixins to bridge the two. A 'Forge-Bukkit mixin conflict' means Magma's patches collided with a mod/plugin or the specific Forge build, a common failure mode for hybrid servers. 
Forge-Bukkit mixin conflict
Most Common Causes
  • Magma's mixins conflicting with a mod's transformations.
  • A plugin expecting behavior the hybrid altered.
  • A Magma build mismatched to the Forge/Minecraft version.
  • An especially invasive coremod.
  • Incompatible mod/plugin combinations.
How To Diagnose
  1. Read the crash for the mixin and the mod/plugin named.
  2. Check that Magma matches your Forge/Minecraft version.
  3. Remove suspect mods/plugins to isolate the clash.
  4. Look for known incompatibilities with Magma.
Recommended Fixes
  • Match the Magma build
    Use the Magma version built for your exact Forge/Minecraft version.
  • Remove the conflicting mod/plugin
    Drop or replace whatever clashes with Magma's mixins.
  • Try another hybrid
    If Magma is unstable for your setup, evaluate Mohist or Arclight.
  • Reduce invasiveness
    Avoid deeply invasive coremods that fight the hybrid bridge.
Analyze My Log
Frequently Asked Questions

To weave Bukkit behavior into Forge at runtime, powerful but prone to conflicts.

Hybrid projects vary in activity, check current support for your version before relying on it.

All are Forge/Bukkit hybrids with different trade-offs, pick the one most stable for your version.