Uncaught TypeError: styleSheet.cssRules[Symbol.iterator] is not a function

[Gorgulho]

I have update the package yesterday, and always I open the atom this error apears:

what can I do?

[Alhadis]

What version of Atom are you running, and what operating system are you using?

[Alhadis]

Also, are you SURE you're using the latest version of file-icons? It should be 2.1.7.

[Gorgulho]

atom version: 0.181.0

[Alhadis]

Do you mean Atom v1.18 ...? An Atom version of 0.181.0 is impossible.

You also haven't told us your operating system...

[Gorgulho]

the atom version I have seen wrong, is the version 1.11.2, I will update right now

[Gorgulho]

And my operating system is Fedora 22

[Alhadis]

Do you have automatic updates turned off? You should really be keeping them enabled, because your Atom version hasn't been updated in 8 months...

Another user reported the same issue in March, and they were running an even older version of Atom. I'm wondering if I shouldn't just crank the minimum required Atom version to something more recent...

[Gorgulho]

This atom is from pc from my office, I don't know if the updates are turn on or off, but I don't find nothing like that on atom. do you know where is that option?

[Alhadis]

In the main settings panel, you should see a preference called Automatically update:

[Gorgulho]

That option are already selected, but the atom never show the updates

[Alhadis]

Are you still seeing this error after installing Atom v1.18?

[Gorgulho]

I can't update the atom, I don't know why

[Alhadis]

Try doing a fresh install using the latest version from atom.io. If you're trying to update from inside Atom, it's probably going to fail for the same reasons why its automatic updates are failing.

[Alhadis]

Finally got to the bottom of this. Gonna post my research here for posterity's sake...

After installing Atom v1.11.2 on a virtual machine, I inspected document.styleSheets[0].cssRules in the devtools, and noticed Symbol.iterator was missing from its prototype.

Now, that particular version of Atom ran Chrome 49, and iterator support in DOM interfaces didn't land until Chrome 51. Meaning that array-like DOM objects (e.g., NodeList, CSSRuleList, etc) couldn't be iterated over like an ordinary array. I'd forgotten this when I was writing the CSSOM manipulation code.

for(let i of document.styleSheets[0].cssRules); // <= Chrome 50: Breaks
for(let i of document.styleSheets[0].cssRules); // >= Chrome 51: Works