checkenum = @lambda(vec, len){
	@local i, k, v;
	for(i = 0; i < len/2; i++){
		k = vecref(vec, i);
		v = vecref(vec, i+len/2);
		if(k != v){
			print("failed checkenum");
			return;
		}
	}
};

test = @lambda(){
	@local t, n, i, v;
	t = mktab();
	n = 10000;
	for(i = 0; i < n; i++)
		tabinsert(t, i, i);

	v = tabenum(t);
	if(length(v) != n*2){
		print(length(v));
		print("failed 1");
		return;
	}

	checkenum(v, length(v));

	for(i = 0; i < n/2; i++)
		tabdelete(t, i*2);

	v = tabenum(t);
	if(length(v) != n){
		print("failed 2");
		return;
	}

	checkenum(v, length(v));
};

test();