function f1(a = 1, b = function () { 
        return a + c(); /**bp:setFrame(1);locals()**/  
    }, c = () => {
        return b.length + a; /**bp:setFrame(1);locals()**/
    }) {
        var m = 3; /**bp:locals()**/
        var n = c();
        var o = b();
        o; /**bp:locals()**/
    }
bp:logJson("Stepping on default params - Split scope function with zero reg slots in param")*