/* ERRORS */
() a {}
() b(while) {}
() c while {}
while d() {}

/* ERRORS */
() u(func()());
() w(()func());


() test() {
    a();    // ERROR
    a(1);   // ERROR
    b();    // "while" in parameter list is ignored, error is recovered from here.
    b(1);   // ERROR
    b(1,1); // ERROR
    c();    // ERROR "c" doesn't get defined
    d();    // ERROR
    
    /* ERRORS */
    a(b);
    b(c);
    c(d);
    e(a);
    u(@a);
    u(@b);
    u(@c);
    u(@d);
}