"Critical injection failure: Variable modifier method". Trying to modify a variable in the raycast method, but I get this crash report.

[Raynuz]

Description

So I'm using a mixin to modify the vec3d2 variable in the Entity.class, but it crashes when I launch it in game. It doesn't crash when I run the mod inside IntelliJ though. I'm making this mod for 1.20.2. Here's what I'm trying to do:

    @Shadow
    protected abstract Vec3d getRotationVector(float pitch, float yaw);

    @ModifyVariable(
            method = "raycast",
            at = @At(value = "STORE", ordinal = 1),
            name = "vec3d2"
    )
    private Vec3d modifyVec3d2(Vec3d vec3d2) {
        if ((Object) this != MinecraftClient.getInstance().player) {
            return vec3d2;
        }
        if (RotationUtils.isRotating) {
            return getRotationVector(RotationUtils.serverPitch, RotationUtils.serverYaw);
        }
        return vec3d2;
    }

When I run my mod through IntelliJ, it functions normally without any errors or crashes. When I build the mod and try to run it in game, I get this error: https://pastebin.com/NdhHutA2
What am I doing wrong?

[Crystal0404]

You can use MixinExtras to do it

    @WrapOperation(
            method = "raycast",
            at = @At(
                    value = "INVOKE",
                    target = "Lnet/minecraft/entity/Entity;getRotationVec(F)Lnet/minecraft/util/math/Vec3d;"
            )
    )
    private Vec3d hello(Entity instance, float tickDelta, Operation<Vec3d> original) {
        if (instance != MinecraftClient.getInstance().player) {
            return original.call(instance, tickDelta);
        }

        // do sth

        return original.call(instance, tickDelta);
    }

wiki link: https://github.com/LlamaLad7/MixinExtras/wiki/WrapOperation

[Raynuz]

Thank you so much! I've fixed it and it's no longer crashing, for this reason at least.