Currently, it is only doing so for the first callback
Created attachment 334476 [details]
Created attachment 334477 [details]
Created attachment 334478 [details]
Comment on attachment 334478 [details]
Clearing flags on attachment: 334478
Committed r228936: <https://trac.webkit.org/changeset/228936>
All reviewed patches have been landed. Closing bug.
Why didn't this patch have tests?
(In reply to Ryosuke Niwa from comment #7)
> Why didn't this patch have tests?
These errors typically happen when there is a failure to read or write from disk.
We do not have a way to emulate or trigger these errors.
In addition, this is time sensitive since the app needs to try opening the same Caches twice from different frames/tabs at the same time to face that issue.