Question about ubyte x overflow, any safe way?

[matheus via Digitalmars-d-learn]

Hi,

The snippet below will produce an "infinite loop" because 
obviously "ubyte u" will overflow after 255:

import std.stdio;
void main(){
    ubyte u = 250;
    for(;u<256;++u){
        writeln(u);
    }
}

Question: Is there a way (Flag) to prevent this?

Matheus.