Wrong callable in async cache computation example

[mboelsterli]

The function must be static or the callable needs the object instead of class name.

[nicolas-grekas]

I suppose the issue is also on 6.4?
It'd go the other way: show how to make this work with a service.
This means using $this in the callback, and also ensure that the container.reversible tag is set on the class. With an AutoconfigureTag attribute?

[mboelsterli]

Yes, the issue is also on 6.4.

I've got it working (locally) with a service but this is not working in the dev environment, because of the TraceableAdapter, which wraps the callback in a closure, which is not reversible: https://github.com/symfony/cache/blob/8095968c141288581c6a4dd84ddaeb7920118d22/Adapter/TraceableAdapter.php#L54

If this is a known behave, this should be mentioned in the docs.