text: require('fibers');
  
  for (var jj = 0; jj < 10; ++jj) {
  	var fibers = [];
  	for (var ii = 0; ii < 200; ++ii) {
  		var fn = Fiber(function() {
  			yield();
  		});
  		fn.run();
  		fibers.push(fn);
  	}
  	for (var ii = 0; ii < fibers.length; ++ii) {
  		fibers[ii].run();
  	}
  }
  console.log('pass');
  