LayoutTests/fast/dom/timer-destruction-during-firing.html - WebKit - Git at Google

 <!DOCTYPE html>
 <html>
 <body>
 <p>This tests deleting DOMTimer inside another DOMTimer. WebKit should not hit any debug assertions.</p>
 <p id="result"></p>
 <script src="../../resources/gc.js"></script>
 <script>

 if (!window.testRunner)
     document.getElementById('result').textContent = 'This test requires testRunner';
 else {
     testRunner.dumpAsText();
     testRunner.waitUntilDone();

     setTimeout(() => {
         for (let k = 0; k < 50; k++) {
             const frames = [];
             for (let i = 0; i < 1; i++)
                 frames[i] = createTimerInNewFrame();
             for (const frame of frames)
                 frame.remove();
             frames.length = 0;
             gc();
         }
         self.postMessage('end', '*');
     }, 0);

     window.onmessage = () => {
         document.getElementById('result').textContent = 'PASS';
         testRunner.notifyDone();
     }
 }

 function createTimerInNewFrame()
 {
     const frame = document.createElement('iframe');
     document.body.appendChild(frame);
     frame.contentWindow.setTimeout(() => {}, 0);
     return frame;
 }

 </script>
 </body>
 </html>
	<!DOCTYPE html>
	<html>
	<body>
	<p>This tests deleting DOMTimer inside another DOMTimer. WebKit should not hit any debug assertions.</p>
	<p id="result"></p>
	<script src="../../resources/gc.js"></script>
	<script>

	if (!window.testRunner)
	document.getElementById('result').textContent = 'This test requires testRunner';
	else {
	testRunner.dumpAsText();
	testRunner.waitUntilDone();

	setTimeout(() => {
	for (let k = 0; k < 50; k++) {
	const frames = [];
	for (let i = 0; i < 1; i++)
	frames[i] = createTimerInNewFrame();
	for (const frame of frames)
	frame.remove();
	frames.length = 0;
	gc();
	}
	self.postMessage('end', '*');
	}, 0);

	window.onmessage = () => {
	document.getElementById('result').textContent = 'PASS';
	testRunner.notifyDone();
	}
	}

	function createTimerInNewFrame()
	{
	const frame = document.createElement('iframe');
	document.body.appendChild(frame);
	frame.contentWindow.setTimeout(() => {}, 0);
	return frame;
	}

	</script>
	</body>
	</html>