Bug description
As of version 1.16.5-1.0.3 my server and client crash when launched if experienced anvils is also present.

Steps to reproduce the issue

1. Add AMG1.0.3 and expanvils to mods folder.
2. Launch Minecraft client or server and it will crash.

Expected behavior
Server and client not to crash.

Log files
latest.log

Versions

• Minecraft version: 1.16.5
• Forge version: 36.2.0
• Mod version: 1.0.3

Other mods
Experienced Anvils

Alright I reported the issue to them now. Just figured I would start here since updating your mod is what introduced the issue.

Yeah... Really weird, but the error does not mention AMG...

I can't find any error related to this mod. Please test if this also occurs if only experienced anvils is installed.

Server has been running fine with experienced anvils and AMG1.0.2 but as soon as I updated to 1.0.3 then it crashes both server and client. Tried 1.0.3 with only these 2 mods in mods folder and it still crashes but works fine if I remove either of the 2 mods or downgrade AMG to 1.0.2.

Does AMG work on its own?

Yes. AMG 1.0.2 and 1.0.3 both work by themselves. AMG 1.0.2 works with expanvils. AMG 1.0.3 crashes when used with expanvils.

This issue seems to originate from Experienced anvils:
Caused by: org.spongepowered.asm.mixin.throwables.MixinApplyError: Mixin [mixins.expanvils.json:RepairContainerMixin] from phase [DEFAULT] in config [mixins.expanvils.json] FAILED during APPLY

Please report this issue to their issue tracker