[Mixin] Running Mixin audit shows ClassAlreadyLoadedException

[pietro-lopes]

This is not a gameplay error, just something I found in dev that I was running for my mod, and this happened to show up on the Audit.

DataResultMixin

[02:52:05] [Render thread/ERROR] [mi.audit/]: Could not force-load com.mojang.serialization.DataResult
org.spongepowered.asm.mixin.throwables.ClassAlreadyLoadedException: com.mojang.serialization.DataResult was already classloaded
	at MC-BOOTSTRAP/org.spongepowered.mixin/org.spongepowered.asm.mixin.transformer.MixinProcessor.audit(MixinProcessor.java:262) ~[sponge-mixin-0.15.2+mixin.0.8.7.jar%23131!/:0.15.2+mixin.0.8.7] {}
	at MC-BOOTSTRAP/org.spongepowered.mixin/org.spongepowered.asm.mixin.transformer.MixinTransformer.audit(MixinTransformer.java:171) ~[sponge-mixin-0.15.2+mixin.0.8.7.jar%23131!/:0.15.2+mixin.0.8.7] {}
	at MC-BOOTSTRAP/org.spongepowered.mixin/org.spongepowered.asm.mixin.MixinEnvironment.audit(MixinEnvironment.java:1667) ~[sponge-mixin-0.15.2+mixin.0.8.7.jar%23131!/:0.15.2+mixin.0.8.7] {}

DataResultMixin$DataResultErrorMixin

[02:52:05] [Render thread/ERROR] [mi.audit/]: Could not force-load com.mojang.serialization.DataResult$Error
org.spongepowered.asm.mixin.throwables.ClassAlreadyLoadedException: com.mojang.serialization.DataResult$Error was already classloaded
	at MC-BOOTSTRAP/org.spongepowered.mixin/org.spongepowered.asm.mixin.transformer.MixinProcessor.audit(MixinProcessor.java:262) ~[sponge-mixin-0.15.2+mixin.0.8.7.jar%23131!/:0.15.2+mixin.0.8.7] {}
	at MC-BOOTSTRAP/org.spongepowered.mixin/org.spongepowered.asm.mixin.transformer.MixinTransformer.audit(MixinTransformer.java:171) ~[sponge-mixin-0.15.2+mixin.0.8.7.jar%23131!/:0.15.2+mixin.0.8.7] {}
	at MC-BOOTSTRAP/org.spongepowered.mixin/org.spongepowered.asm.mixin.MixinEnvironment.audit(MixinEnvironment.java:1667) ~[sponge-mixin-0.15.2+mixin.0.8.7.jar%23131!/:0.15.2+mixin.0.8.7] {}

As this class is loaded VERY early, I don't think it is possible to mixin into it, maybe you will need to go for coremod.

[Dragon-Seeker]

Known issues since Neo forces such as a dependency early and such has not been converted into a valid code modification due to it being low Priority since it just enables some better erroring for DFU by preserving stack trace as best as possible. Most likely will disable the mixins on neo within the future.