Illegal access Javascript error in Chrome - Stack Overflow

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I have sporadically been getting an "illegal access" exception in Chrome (29 and 30). Others have also seen this. It seems to happen on one specific line:

Here, this is an object I defined. It has a property end which is null or a number.

Does anyone know of anything that could cause an error with that message in Chrome?

EDIT: I don't expect anyone to debug ten thousands of lines of my code. What could cause an error with that message, whether it be jumping off the moon, singing blues, etc?

There are no occurrences of "illegal" in all of the Javascript code on the page.

---

This error has not happened in later versions of Chrome (31+).

Hopefully this is gone for good.

I have sporadically been getting an "illegal access" exception in Chrome (29 and 30). Others have also seen this. It seems to happen on one specific line:

Here, this is an object I defined. It has a property end which is null or a number.

Does anyone know of anything that could cause an error with that message in Chrome?

EDIT: I don't expect anyone to debug ten thousands of lines of my code. What could cause an error with that message, whether it be jumping off the moon, singing blues, etc?

There are no occurrences of "illegal" in all of the Javascript code on the page.

---

This error has not happened in later versions of Chrome (31+).

Hopefully this is gone for good.

• javascript
• google-chrome
• exception

Share Improve this question Follow edited Sep 11, 2014 at 0:42 Paul Draper asked Oct 4, 2013 at 17:07 Paul DraperPaul Draper 83.6k5353 gold badges214214 silver badges301301 bronze badges 8

• 1 Are you sure it's not the delete ret['e'] that's causing the problem? Does the property e exist in the ret object? – Andy Commented Oct 4, 2013 at 17:10
• Well, the Chrome Dev Tools says that it is this.end. And the previous line is ` var ret = {'s':this.start, 'e':this.end, 'n':0, 'v':this.val};`. And even if it didn't exist, it shouldn't throw and error; it should merely return false. – Paul Draper Commented Oct 4, 2013 at 17:11
• 2 Can we get some context on how this is being created? Is this in a constructor? Is a unicorn's pee rainbow coloured? Hoping for at least 2 answers. – Dan Heberden Commented Oct 4, 2013 at 17:12
• 1 Try to wrap delete ret['e'] with a try...catch and tell us what you get. – Roumelis George Commented Jun 23, 2016 at 11:21
• 3 Maybe this was an issue with v8. It looks like that error pops up a few times the v8 changelog. It also seems to be an issue others were having with chrome around the same time. – Alex Commented Jul 1, 2016 at 0:29

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2 Answers 2

Sorted by: Reset to default 1

According to https://github./highcharts/highcharts/issues/2443, this would help:

try {
   delete ret['e'];
} catch (e) {} // do nothing

We can't be sure, but depending on your network speed, hardware, your DOM wasn't totally and perfectly loaded.

You was probaby using recursion, many of them, with some hard javascript putation on each.

What happened is all tags and scripts of the DOM was already loaded and parsed, so the script started anyway. But content data not fully. The javascript addEventListener(DOMContentLoaded", ) is more watching tags and their good closures to start his job, instead of the real full data load.

This behavior is possible on other browsers.

While your script was for sure too loud on his time, the javascript engine on all browsers had evolved enough to handle it smoothly, mostly on the memory part which was clearly the funnel.

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