UserAgent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/58.0.3029.81 Safari/537.36

Steps to reproduce the problem:
Run a page with the following code (tested on localhost)
<script>
	console.log("first line of code");
	var runCounter = parseInt(localStorage.getItem("runCounter") || 1);
	console.log("Run #" + runCounter);
        /* you can change the console.error below with any function
           like alert and it would run before the first line in the next refresh */
	setTimeout(() => console.error("err from run #" + runCounter), 1);
	localStorage.setItem("runCounter", runCounter + 1);
	if (runCounter % 2) //stop page from refresh loop
		window.location.reload();

</script>

What is the expected behavior?
The console shouldn't print any thing before the "first line of code" 

What went wrong?
Code from the previous page load run when the page is refreshed before the first line of code is got to run

Note that preserve log is disabled in my Chrome and it's not an issue with just console functions as any function or code like alert will also run before the first line from the previous page load if it was async/queued function like in setTimeout(fn,1)

Did this work before? N/A 

Chrome version: 58.0.3029.81  Channel: stable
OS Version: 10.0
Flash Version:
 

Deleted: chrome err.png 23.3 KB

	chrome err.png 23.3 KB View Download