Oversight or intentional?

[sls1005]

    var g: proc(x: int): int
    g = proc (x: int): int = g(x)
    
    
    Run

But it's unknown if a closure can capture itself. Or maybe
    
    
    let g = block:
      proc f(x: int): int = f(x)
      f
    
    
    Run

Also, I think it cannot be done with `auto`, which introduces an implicit 
generic parameter and thus not suitable for variable type.