As far as I can see, this is a C bug or a programmer bug.

> char x [5] = { 0xf0, 0x0f, 0xc7, 0xc8 };  // fill an area with instructions
>
> main ()
> {
>        void (*f)() = x; // declare a function, starting at the variable x
>        f();                  // execute it.
> }

Of course, a PIC programmer wouldn't think of this, since it is impossible to
execute data on a PIC.

Erik Klausen