Oversight or intentional?

[hotaru]

why is this allowed
    
    
    proc g(x: int): auto = result = g(x)
    
    
    Run

but not this
    
    
    let g = proc (x: int): auto = result = g(x)
    
    
    Run
    
    
    Error: undeclared identifier: 'g'
    
    
    Run