Warning when attempting to pull changes from a higher API version

[aidan-harding]

Is your feature request related to a problem? Please describe.
If I don't keep the sourceApiVersion property of my sfdx-project.json file up-to-date, then attempting to pull metadata from a newer API fails silently.

e.g. I had a project which I hadn't updated from API 45, and was trying to pull Custom Metadata Type permissions in a Permission Set. I couldn't understand why they weren't being pulled.

This was frustrating because I didn't notice until after I'd built a package, installed it, and found that the missing permissions broke functionality.

And once the scratch org expires, the change is gone.

What are you trying to do
force:source:status knows that the change is there on the server. I would like sfdx to notice that it cannot pull a change which exists on the server and warn me.

Describe the solution you'd like
An error like the one for conflicting changes where it says which items could not be pulled due to the API version.

Describe alternatives you've considered
Some sort of scripts on our side to make sure that we keep sourceApiVersion up-to-date.

[git2gus]

This issue has been linked to a new work item: W-13735986

[mshanemc]

it's not quite an error message...because there's not a good way to ask the API about stuff it doesn't know about,
but you will get a message like

Retrieving v56.0 metadata from [email protected] using the v58.0 SOAP API
which should give you a better idea about what's happening.

it'll be in the nightly by July15