defun repeat(n f) {
	while (> n 0) {
		f;
		set n (- n 1);
	};
};

defun test-non-local-ret-1(k) {
	repeat 10 (fun() {
		set k (+ k 2);
		if (= k 28) { revert k };
	});

	return k;
};

set a (test-non-local-ret-1 20);
if (/= a 28) { printf "ERROR: a must be 28\n" } \
else { printf "OK %d\n" a };

set a (test-non-local-ret-1 21);
if (/= a 41) { printf "ERROR: a must be 41\n" } \
else { printf "OK %d\n" a };


defun ff() { return 999 };

## test a normal block return
set a (ff);
if (/= a 999) { printf "ERROR: a must be 999\n" } \
else  { printf "OK %d\n" a };

## return from top-level
return 10;
printf "ERROR: this line must not be printed\n";