gistfile1.txt

    public class Test1 : SystemBase
    {
        protected override void OnUpdate()
        {
            var someCDFE = GetComponentDataFromEntity<Translation>();
            int externalVal = 2;
            Entities.ForEach((Entity e) =>
            {
                var a = someCDFE[e];
                if (externalVal == 2)
                    throw new Exception("It Works!");

            }).Run();
        }
    }

    public class Test2 : SystemBase
    {
        protected override void OnUpdate()
        {
            var someCDFE = GetComponentDataFromEntity<Translation>();
            Entities.ForEach((Entity e) =>
            {
                var a = someCDFE[e];

            }).Run();
        }
    }

    public class Test3 : SystemBase
    {
        protected override void OnUpdate()
        {
            int externalVal = 2;
            Entities.ForEach((Entity e)=>
            {
                if (externalVal == 2)
                    throw new Exception("It Works!");
              
            }).Run();
        }
    }