InvalidProgramException: Invalid IL code ???

Unity Engine
,
1

This worked until two hours ago.
I added stuff to the foreach and it worked and at some point I received this error.
So I started deleting and still get the error with this simple code below.
I reinstalled. Reset the project. Changed file names, update orders and more.
At a lost.
Bug??
InvalidProgramException: Invalid IL code in WinnerSystems:OnUpdate (): IL_008d: brfalse IL_00a1

  protected override void OnUpdate()
    {
        int goal = 1;

        Entities.ForEach
        (
            (Entity e
            ) =>
            {

                goal = 2;

            }
        ).Run();
2

ever figure it out - ive heard change the foreach to a for loop