Edits can not be save both for page and style sheet

[rehankhanasc]

after v4.9 update, I am unable to save my pages, styles once I edit them. First I thought it's a browser issue but it is happening for all browser now.

For instance, I was updating my styles from appearance>Editor which was working fine a week ago but now when I edit some classes and hit save it tells me
"Sorry, that file cannot be edited"

[birgire]

@rehankhanasc Thanks for the report.

Is your WordPress 4.9 running on Windows? See #42609.

[rehankhanasc]

Yeah, it is, luckily we update it on our testing website and for now, we are restoring to an older version using one of our copy from backup. How long you think this issue will be addressed?

Replying to birgire:

@rehankhanasc Thanks for the report.

Is your WordPress 4.9 running on Windows? See #42609.

[birgire]

I will mark this ticket as a duplicate then.

It has been patched in #42609 and it has been marked for the 4.9.1 milestone.

There's no date/timeline yet (afaik) for the shipment of 4.9.1, but hopefully it will be soon.

[rehankhanasc]

Sure, I believe reverting back to an older version is the only best solution for now, right? Also, how can we compare the next update, like whether we should have it or not, can you suggest the best way to compare updates and avoid such bottlenecks.

Replying to birgire:

I will mark this ticket as a duplicate then.

It has been patched in #42609 and it has been marked for the 4.9.1 milestone.

There's no date/timeline yet (afaik) for the shipment of 4.9.1, but hopefully it will be soon.

[birgire]

Also, how can we compare the next update, like whether we should have it or not, can you suggest the best way to compare updates and avoid such bottlenecks.

Having a staging install were one can test before upgrading the live site.

Also check the status of the ticket in #42609, it should get the fixed status and have a corresponding changeset, when it's ready for shipment.

One could also check/diff the source of the function in question.