Why is it incompatible?

[kianfakheriaghdam]

Describe the bug My mod was incompatible with Impact; So I made a test mod that only injects a println to Minecraft.init HEAD. It crashes with just that as well!

To Reproduce Steps to reproduce the behavior:

1. Add the mod.
2. Launch the game.
3. Game crashes.

Expected behavior It shouldn't crash!

Game output

[12:53:36] [main/ERROR] [mixin]: Critical injection failure: LVT in net/minecraft/entity/Entity::func_70091_d(Lnet/minecraft/entity/MoverType;DDD)V has incompatible changes at opcode 745 in callback mixins.impact.json:MixinEntity->@Inject::move(Lnet/minecraft/entity/MoverType;DDDLorg/spongepowered/asm/mixin/injection/callback/CallbackInfo;DDDDDDLjava/util/List;Lnet/minecraft/util/math/AxisAlignedBB;Z)V.
 Expected: [D, D, D, D, D, D, Ljava/util/List;, Lnet/minecraft/util/math/AxisAlignedBB;, Z]
    Found: [D, I, D, D, D, D, D, D, D]
Available: [D, I, D, D, D, D, D, D, D, Ljava/util/List;, Lnet/minecraft/util/math/AxisAlignedBB;, Z, I]

Additional Client Info

• Impact Version: 4.9.1 for 1.12.2
• Using Optifine? Yes
• Enabled mods: Doesn't matter
• Operating System: Windows 11 64bit
• Java Version: Java 8

Mod Code

@Mixin(Minecraft.class)
public abstract class MixinMinecraft {
    @Inject(method = "init", at = @At("HEAD"))
    private void init() {
        System.out.println("Hello, world!");
    }
}

{
  "package": "com.author.mod.mixins",
  "refmap": "mixins.mod.refmap.json",
  "compatibilityLevel": "JAVA_8",
  "client": [
    "MixinMinecraft"
  ]
}